Roof waterproofing is the basis of comfort, warmth and coziness in the house, but only subject to compliance with building codes. Roof waterproofing materials

The tightness of the roof is the most important condition for the durability of the building and the comfort of living in it. Currently, the industry produces a wide range of special quality materials, allowing you to perform reliable waterproofing of all types of roofs, regardless of the climatic zone of the location of the building.

Roofing without additional construction measures cannot guarantee tightness, especially for technological and engineering communications. Flat and sloping roofs have their own technology and waterproofing materials.

When choosing specific types of waterproofing, you need to pay attention to the following parameters:

• practicality and economy;
• manufacturability and maintainability;
• safety and environmental friendliness;
• cost and operating time.

Each type of roof has its own architectural features, which affects the materials of manufacture and application technology. To facilitate the choice, we recommend that you familiarize yourself with a short list of well-known brands.

Table. Most well-known manufacturers waterproofing materials.

Manufacturer's name	Technical specifications	Variation in prices depending on the brand
	Used for waterproofing flat roofs, built-up, SBS-modified. It is made on the basis of fiberglass, fiberglass or polyester, can be coated with stone chips or double-sided film coating. The waterproofing is built-up roll.	90–130 rubles
	Base: fiberglass, polyester, frame fabric. Roll welded waterproofing for flat roofs. Differs in the increased indicators of flexibility at negative temperatures, protective coating - modified bitumen.	70–110 rubles
	The front side has a coarse-grained stone dressing, the working side is protected by a polyethylene film. During heating, the protective film is self-removing. Waterproof coating - oxidized bitumen, resistant to the negative effects of harsh ultraviolet rays.	65–85 rubles
	It is made on the basis of fiberglass or fiberglass, stone chips are applied on one side. Roll welded waterproofing for flat roofs. Before starting work, the base should be coated with a bitumen-based primer.	50–65 rubles
	Traditional roll waterproofing based on cardboard, is now rarely used due to unsatisfactory performance. Advantage - low cost.	45–55 rubles
	It is used for waterproofing flat and sloping roofs, it can be non-reinforced and reinforced. Service life not less than 30 years, does not lose elasticity at negative air temperatures. Not afraid of UV rays.	400–500 rubles
	Business-class polymer membranes are made on the basis of durable polyvinyl chloride, due to reinforcement, mechanical strength indicators are significantly increased. It has absolute water resistance, does not support open fire.	350–410 rubles
	Mastics based on modified bitumen, universal use. They can be used alone or as additional means of waterproofing various roofing materials.	1800–2800 rubles
	Mastic for a wide range of purposes, can be made on the basis of bitumen or artificial rubber. It has high adhesion with various building materials. Application is allowed only on dry surfaces.	1400–2300 rubles
	It is made using modified bitumen, applied cold. It has high adhesion values, does not react to hard ultraviolet radiation. Easy to use long time retains its original characteristics.	1000–1100 rubles

Prices for waterproofing mastic Bitumast

Materials for waterproofing flat roofs

When choosing waterproofing materials for flat roofs, one should be guided by the provisions of SP 17.13330.2011. According to regulations, on roofs with a slope of 1–6° it is allowed to use rolled bituminous and bitumen-polymer materials with a protective coating of the outer surface with fine-grained dressing, for roofs with a slope of up to 14° it is allowed to use waterproofing materials with coarse-grained dressing. Polymer coatings it is allowed to use for flat roofs with a slope of at least 1–3 °.

SP 17.13330.2011. Roofs. Updated edition of SNiP II-26-76. Download file (click on the link to open the PDF file in a new window).

Currently, several types of waterproofing are used for flat roofs.

Prices for coating waterproofing

For example, consider the option of waterproofing flat roof the most modern rolled material based on durable synthetic fabrics coated with modified bitumen.

Step-by-step instructions for waterproofing flat roofs

Statistics show that approximately 80% of leaks on flat roofs occur not due to the fault of the materials used, but due to technological errors of builders: the wrong choice of waterproofing materials, improper mating angles, poor-quality foundation preparation, bad weather conditions during work, etc. e. Technical indicators of modern waterproofing coatings guarantee operation for at least thirty years, but only if used correctly.

We perform waterproofing of a flat roof (in this case, a garage)

Step 1. Decide on the choice of materials. All roll waterproofing materials are divided into two classes: bitumen and bitumen-polymer. The latter, in turn, can be made from SBS or APP modified bitumen. If the house is located in a region with a warm climate, then choose materials based on APP, they are more resistant to high temperatures and will not leak during heating in summer. For cold climates better fit material based on SBS, this modification of bitumen retains its elasticity at low temperatures and does not crack in winter period. Calculate the roof area, buy the required amount of waterproofing, taking into account the width of the overlap and overlap. Each roll has a mark indicating the overlapping line of the rows.

What you need for work - waterproofing for a flat roof, bituminous primer, rollers, roofing knives, spatulas, brushes

Step 2 Prepare the base of the roof. On an improperly prepared base, the life of roofing is significantly reduced. What are the requirements for foundations?

Step 3 Prime the roof surface. It is recommended to use bitumen-based materials as primers. The primer must be done carefully, do not leave gaps. Particular attention should be paid to various joints and corners. Prime the vertical elements of the structure to the height of the roll.

Step 4 Start laying the waterproofing layer. The recommended side overlap is at least 8 cm, but each manufacturer can change this parameter. Pay attention to the designations on the rolls, there are special lines or other marks to control the overlap. End overlaps ≈15 cm, while placing them at a distance of at least 50 cm from each other.

Practical advice. Roll waterproofing materials based on bitumen are recommended to be laid in two layers, the second should be done with an offset so that the overlap seam is located in the middle. Permissible distance between the side joints - at least 30 cm.

If you plan to do two layers, then the first should be without sprinkling, due to this, adhesion increases and tightness increases.

Step 5 After the base has dried, roll out the first roll on it. Correct its position, taking into account overlaps and overlaps. If everything is normal, gently roll it up, for relief it is recommended to use metal pipe appropriate length. Be careful not to change the position of the roll during rolling.

Step 6 Cut the protective film and, carefully removing it, begin to roll out the roll.

waterproofing membrane prices

waterproofing membrane

Features of sealing complex nodes

Vertical architectural elements must be even and smooth; piece masonry materials must be plastered. The main waterproofing carpet must be laid on vertical surfaces above the transitional ledge. The first layer without sprinkling should go onto a vertical surface to a height of at least 25 cm, the second with sprinkling by about 10 cm. Horizontally, the overlap is within 15 cm. To increase the reliability, it is recommended to additionally fix the upper abutment line with metal profiles. How to seal the junction of vertical surfaces?

1. Cut off a piece from the roll, its length is equal to the design vertical height plus the design length of the horizontal abutment.
2. Roll the material into a roll and stick it to the place of gluing. Check position.
3. Hold the lower end with your foot or hand, and heat the upper end with a burner. Stick it on as it warms up.
4. Bend the lower end, heat the bitumen and glue the canvas to the first layer of waterproofing.

Practical advice. If bottom layer has a dressing at the junction, then it must be warmed up well with a burner, and the pebbles should be pressed into the bitumen with a metal flat spatula.

Funnels for draining water should be located at the same distance, at least two drain points should be made in each area. Waterproofing technology depends on their design and manufacturer's recommendations.

Prices for various types of gas burners and blowtorches

Gas burners and blowtorches

Materials for waterproofing pitched roofs

Pitched roofs have a truss system, roofing can be made with soft and hard roofing materials. Waterproofing should be selected taking into account architectural features truss system, type of roof (warm or cold), angle of inclination, etc. Another important point – the truss system is designed for a certain weight, increase the mass roofing cake Not recommended. Accordingly, waterproofing for pitched roofs must have a minimum specific gravity. Today in the implementation there are the following types of hydroprotection.

For an example of waterproofing a pitched roof, consider the option of membrane waterproofing.

Step-by-step instructions for waterproofing pitched roofs

Let's talk about the most complex and expensive technology for installing waterproofing on pitched roofs. In practice, some stages can be skipped, the quality of the roof will not suffer from this.

Step 1. Attach a dropper to the wind boards with self-tapping screws, water from the waterproofing will drain onto it. The dripper is sold as a set with roofing or separately. The specific design does not matter, they all perform their tasks perfectly.

Step 2 Stick butyl rubber tape on the dripper, and a thin double-sided tape on top of it. These elements are needed to securely fix the edge of the waterproofing membrane and prevent it from being torn off by gusts of wind.

Step 3 Start laying the membrane. The edge should be glued to the dropper, the outlet above the wall should be at least 15 cm. You will have to either leave it in this position, or start all work from the beginning. Fix the membrane to each rafter with a stapler. The number of staples is not of great importance; in the future, the material will be additionally pressed by a counter-batten.

Practical advice. In order to facilitate the process of gluing the material to the dropper, it is recommended to temporarily fix the boards to the rafters to support the legs. In the future, they will be removed, in their place a counter-lattice and a crate will be nailed.

Step 4 After the first row of waterproofing is laid, begin to fasten the counter-lattice of slats approximately 20 × 50 mm in size. To the bottom of the rails, it is recommended to glue a special sealing tape, it will hermetically close the holes from under the brackets and will not allow water to enter the rafters.

Fasten the counter-lattice with self-tapping screws or ordinary smooth nails. The first type of hardware is currently very popular, but it is expensive and difficult to work with. Professionals always use nails, the fixation strength is enough, the crate will not go anywhere.

Step 5 Attach the crate to the counter-lattice, it is easier to arrive from top to bottom. Before starting work, prepare a hard board, it should rest against the screws. Pay great attention to the stability of this board, do not violate safety regulations.

We have already mentioned that this technology is the most complex and expensive. In practice, builders do not install a counter-lattice. Why? The purpose of this element is to provide ventilation between roofing sheets and waterproofing. We assure you that the battens provide the same effective ventilation. There is no need to waste time and money on Additional materials and construction operations.

Video - Flat roof waterproofing

Video - Waterproofing a flat roof garage

Roof waterproofing and materials for it are an integral part of the structure. A large load is constantly placed on the roof and it is she who receives all the flows of water: snow, rain and moisture. That is why the roof covering must be airtight and absolutely waterproof. It is thanks to roofing waterproofing that you can do this by extending the operational life of the roof.

There are many different materials used for sealing. They differ in configuration, composition and their properties. On sale you can find mastics, roll materials and various liquids. Since there are many types of roofing, roofing waterproofing also varies. We will review all products, find out the features of the materials and their scope.

What are waterproofing materials for?

No matter how perfect roofing materials are, none of them is able to 100% protect the under-roof space and roof elements from moisture. The weak point is the joints between the materials. If the coating was monolithic, then there would be no problems with operation. In addition, the places of contact with the walls, the outlet of ventilation, chimney pipes and other elements also become places of leakage. Even self-tapping screws and other fixing elements cannot be screwed in absolutely hermetically.

Another point is the problem inside. Moisture and water vapor are formed in the house. Sources are kettles, boiling pots, iron, human breath, etc. They rise up. Even with insulating material, steam can reach the roof. Only vapor barrier films can protect the roof from moisture penetration. But by arranging cold roof, vapor barrier is not mounted. This means that condensation will form due to the temperature difference.

It turns out that the roofing material is subjected to a double load - from the outside in the form of rain and snow, and from the inside as condensate. Ventilation and waterproofing under the roof will help to cope with such a problem (dew point). The task of waterproofing is to prevent moisture from passing through, which destroys the attic or attic room. Without it, problems will arise during operation. Therefore, steam and waterproofing of the roof is the most important stage. We suggest considering the materials that can be used.

According to the physical state, the materials are divided into:

1. Roll products.
2. Powder.
3. Membrane.
4. In the form of mastics.
5. waterproofing films.

Differences in application method:

1. Adhesive materials.
2. Cast.
3. Backfilling.
4. Mounted.
5. used for coloring.
6. Deep penetration.
7. Plaster.
8. Impregnation.

The set is really huge, so there is plenty to choose from. It remains to understand in which cases to apply one or another option.

Flat roof waterproofing

Flat roofs are called, the angle of inclination of which is not more than 5%. Such options are used for multi-storey buildings and outbuildings. Waterproofing materials for them are as follows:

1. Built-up.
2. Coating.
3. Mounted.
4. Sprayable.

The built-up waterproofing is overlapped, after which it is melted with burners. In the process, a monolithic coating is formed. This is a roll waterproofing for the roof, which does its job perfectly. Previously, roofing material and glassine were used for this purpose. They are cheap, but short-lived and burn. They were replaced by polymer roll materials and bituminous products. Another good option is euroroofing material made of bitumen, synthetic rubber and polymer. Products are much stronger, since synthetic fabric and mineral dressing are used instead of cardboard. Roof waterproofing roll is laid as follows:

Sprayed roof waterproofing allows you to create a monolithic layer or membrane on the surface. It is practical and can withstand various loads. Mechanical strength and moisture resistance high level. True, there is one problem, in order to get the job done, you will need special equipment for spraying, which not everyone can afford.

Advice! It is easier and cheaper to hire workers for spraying. They will quickly and efficiently perform the work, and you do not have to buy expensive equipment.

Powder waterproofing is very popular. It includes synthetic resins, cement, hardeners and plasticizers. Waterproofing goes on sale in the form of a dry mixture, which must be prepared before use. Another option is water repellents. The composition includes silicic acids, silicones and organic solvents. These compounds are absorbed into the concrete, protecting the surface from leakage.

Coating materials are much simpler, as they are applied with a paint brush or roller. To work, you will need mastic for waterproofing the roof. This is a plastic compound that can be used to repair bituminous or built-up roofing and apply it to concrete. Roofing mastic for waterproofing is sold in different forms. It can be liquid rubber, primer, bitumen-rubber and bitumen-polymer compounds. All mastics are divided into two types:

• cold;
• hot.

As for the materials to be mounted, these are film materials. On sale there is a waterproofing film for the roof, a polymer membrane or liquid rubber. The material is laid in the form of a substrate and prevents the penetration of moisture.

Note! Separately, I would like to note the self-adhesive waterproofing of the roof. It's kind roll materials, which are mounted by gluing to the surface.

You can see more details about this simple method in the video.

Waterproofing materials for pitched roofs

Pitched roofs have a different configuration. The difficulty lies in a certain slope of the slope. In this case, similar or different materials are used for waterproofing. The most common - roll. It can be both various kinds of membranes, films, and roofing material or glassine. Only now the laying becomes more complicated, since the material has to be attached to the crate. The peculiarity of products for pitched roofs is that they are mounted under the obligatory roofing material. The main task is to protect the under-roofing space, insulation and structural elements.

Suitable for work:

• single-layer membrane based on rubber;
• single-layer membrane made of polyvinyl chloride (PVC);
• three-layer membrane made of polypropylene (PPN).

An excellent representative of rolled products is isospan roof waterproofing. This is a film that acts as a hydro- and vapor barrier. From the video you can see the features of the material and the method of its installation.

Some people ask what kind of waterproofing is best for a roof. It is impossible to answer this question unambiguously. But many note the simplicity, low cost and practicality of simple films for waterproofing. They are laid on top of the insulation layer (if any), on the crate. Roofing material is covered from above. Fixation is carried out with screws or staples. To ensure high-quality sealing, when installing the film, an overlap of 15-20 cm is made. And adhesive tape for waterproofing the roof will help make the junction airtight. Minus the films - they do not breathe.

Membrane materials are another matter. They embodied all the positive aspects of the brothers. The membrane creates a durable barrier that will not let moisture through. At the same time, the material successfully passes steam, preventing the formation of condensate. The membranes breathe, so in some cases a ventilation gap is not required. An excellent representative of such membranes is Tyvek products. Roof waterproofing and the technology itself is visible in this photo.

Waterproofing a metal roof or any other is done in the same way. And to strengthen the waterproofing, the joints of the metal roof can be treated with special sealants. They are also suitable for those cases when holes are made in the roof for the chimney and other structural elements.

Summing up

No one can do without roof waterproofing. This is a simple, but at the same time necessary product, which is more than enough on store shelves. Some of them are difficult to process and require the intervention of professionals. Others are easy to mount for beginners with their own hands. Therefore, everyone will be able to choose those products that suit him the most.

The roof is one of the main elements of any structure, and is designed to protect the walls and premises of the building from precipitation and wind, maintain a comfortable environment for people living in the house or favorable conditions for objects placed inside. Roof waterproofing film, selection and installation - such aspects always raise a lot of questions, since the creation of a reliable barrier against moisture penetration will always be one of the most important stages in

Today, in the assortment of construction stores you can find a considerable variety of rolled waterproofing materials, and it can be very difficult to immediately understand the features of a particular film. Therefore, in order to decide which of the types is best suited for the planned roofing, there is a need to take a closer look at the characteristics, as well as the features of the installation work.

The main purpose of waterproofing for the roof

For starters, you can recall that earlier, when building private houses, waterproofing pitched roofs It was by no means always settled down - basically this process was carried out on flat or low-slope roofs of multi-storey buildings, and for these purposes, as a rule, roofing material was used. The technology of mandatory waterproofing of roofs came along with materials intended for this purpose from abroad, and it must be said that it has taken root very well in the Russian construction industry.

Nowadays, the construction of a private house is no longer complete by including such a stage of work in the project, since it is one of the most important for the overall protection of the structure from moisture penetration. Waterproofing the truss system helps to avoid frequent repairs and extends the life of the building as a whole.

Of particular importance is the protective film if the under-roof space is insulated with one of the types of thermal insulation materials that can absorb moisture - the same condensate that forms during temperature changes. The waterproofing material is able to reliably protect the insulation, create conditions for its free evaporation into the atmosphere or for removal from under the roof - into a properly equipped gutter, fixed along the slope on the cornice board.

In addition, no one is completely insured against leaks in the roofing, due to its aging, accidental mechanical damage, or even banal errors during installation. The waterproofing barrier will not allow atmospheric moisture to immediately enter the attic directly and spread further, and the owners will have the opportunity to take adequate measures to eliminate the emergency.

Waterproofing membranes are usually sold in 50 m rolls with a width of 1500 mm, and the weight of the roll may vary depending on the thickness and type of film.

glassine

Glassine is a roofing cardboard impregnated with a composition of refractory bitumen with the addition of plasticizers. Glassine goes on sale in rolls and is used for hydro- and vapor barrier of various structural elements.

Many owners of private houses, wanting to buy glassine, are wondering what it is, a hydro or vapor barrier material? For roofing, glassine is used in both one and the other capacity - they vaporize the insulation from the side of the premises and form additional waterproofing for the roofing "pie", laying it under the roofing material.

Several types of roofing glassine are produced with different markings:

• P-300 GOST and P-300 TU - the material has an average density, is waterproof, is characterized as a reliable waterproofing agent, but is inferior to the P-350 brand.

• P-250 is an economy class material, as it is made from low quality raw materials. However, despite this, it has high strength properties, is water and frost resistant, and is also quite elastic.
• P-350 GOST and P-350 TU - this material is the most High Quality of all brands of glassine, as it has abundant impregnation with bitumen. In addition, the advantage of this material lies in its ability to "breathe", so when it is used, a ventilated roofing "pie" is created.

These diagrams represent three ways of using glassine in roofing, where it is used as a waterproofing and vapor barrier layer.

• The first scheme represents the installation of glassine on a flat roof as a vapor barrier layer.

1 - Roofing material.

2 - Concrete screed.

3 - Insulating mats.

4 - Glassine.

5 - Concrete floor.

• Second scheme. Here glassine acts as a waterproofing layer for a pitched cold roof:

1 - Roofing.

2 - Glassine.

3 - Plank solid crate.

• The third scheme represents the location of glassine in the roofing "pie" of the insulated gable roof, in which he plays two roles at once - waterproofing and vapor barrier:

1 - Roofing material.

2 - Glassine (in the role of roofing waterproofing).

3 - Control lathing.

4 - Insulation.

5 - Glassine (vapor barrier from the side of the room).

6 - Rafters.

7 - Drywall (internal sheathing of the attic).

Breathable perforated or diffuse membranes

This type of waterproofing material provides adequate protection for the roofing system from direct penetration of atmospheric precipitation, and at the same time does not prevent the evaporation of water vapor coming out from the inside from the layers of the roofing "pie".

High vapor permeability can be achieved due to the perforation of the material. The film is a non-woven fabric made of synthetic fibers, and is used as a wind and waterproof layer. This material can be laid directly on the insulation, which saves on the arrangement of the control battens. In order for the material to function "correctly", it is necessary to fix it right side to the heater. At the same time, it should be noted that on the construction market you can find both one-sided and two-sided membranes, which, accordingly, can be laid on the insulation on either side. Therefore, when purchasing a film, special attention should be paid to this factor.

The advantage of "breathing" membranes is that they meet all the requirements for roof waterproofing and heat saving. Well, the disadvantages, I must say - conditional, include their high price, in comparison with other similar materials.

For the rest, they can be called the most the best option for roof waterproofing.

According to the level of vapor permeability, "breathable" films are divided into three categories:

• Diffuse, having an average vapor permeability.
• Super diffuse membranes have the highest degree of vapor permeability.
• Pseudo-diffuse films with low vapor permeability, requiring mandatory arrangement between them and the insulation of the ventilation gap.

Overview of commercially available waterproofing materials

A fairly wide range of materials for waterproofing roofs is presented on the Russian market. Some brands can be singled out as a separate line, as they managed to establish themselves exclusively with positive side when used in various climatic conditions, these are Ondutis, TechnoNIKOL, Yutacon, Folder Dorken Delta-Roof, DuPont, Izospan and others.

The technical and operational characteristics of some of them are presented in the table, but they also have general parameters. For example, the size of rolls - the total area of ​​the material is 75 m², with a coating width of 1500 mm and a film length in a roll of 50 m.

Material name	Main technical and operational characteristics	Price, rub/roll as of May 2016
"Ondutis RV100"	It is an environmentally friendly material made from polymers that are inert to bacterial attack. - weight 90±10% g/m²; - vapor permeability (24 h) - 10 g/m²; - strip breaking load 50 mm, N, (along/across): 650/500.	1200÷1500
"Ondutis RS"	This is a reinforced film with good performance characteristics, which is able to provide wind and waterproofing protection. The membrane is resistant to ultraviolet radiation. – weight: 100±5% g/m²; - vapor permeability (24 h): 10 g/m²; - operating temperature range: from -40 to +80°С; - UV stability without coating: 1 month; - strip breaking load 50 mm, N, (along/across): 250/200.	1850
"Ondutis RVM"	This is a non-woven fabric equipped with a heat-reflecting surface, so it protects the insulation from atmospheric humidity in winter, and from overheating in summer, reflecting ultraviolet rays. Thanks to this layer, frost does not form on the roof. – weight: 125±10% g/m²; - vapor permeability (24 h): ÷10 g/m²; - operating temperature range: from -40 to +80°С; - UV stability without coating: 2 months; - strip breaking load 50 mm, N, (along/across): 250/130.	2500
"Folder Minima D98"	This material can be used if there are ventilation gaps in the design. - vapor permeability (24 h): 30 g/m²; - operating temperature range: from -40 to +80°С; - UV stability without coating: 2 months; - strip breaking load 50 mm, N, (along/across): 550/650.	1500-1700
"Folder Anticondensat"	This is an anti-condensation film, which also requires the formation of ventilation gaps. - vapor permeability (24 h): zero; - operating temperature range: from -40 to +90°С; - strip breaking load 50 mm, N, (along/across): 400/450.	1500-1700
"Yutafol D 96 Silver"	Waterproofing two-layer laminated perforated film made of polypropylene. – weight: 96±5% g/m²; - vapor permeability (24 h): 18 g/m²; - UV stability without coating: 3 months; - strip breaking load 50 mm, N, (along/across): 600/400	1395
"Yutafol D 110 Standard"	Three-layer reinforced, laminated on both sides, waterproofing film. – weight: 110 ±5% g/m²; - vapor permeability (24 h): 41 g/m²; - UV stability without coating: 3 months; - strip breaking load 50 mm, N, (along/across): 600/400.	2590
"Yutavek 115"	Super diffuse three-layer film. – weight: 115 ±5% g/m²; - vapor permeability (24 h): 1200 g/m²; - strip breaking load 50 mm, N, (along/across): 260/145.	4950
Tyvek Soft	Single-layer polyethylene waterproofing material with high vapor permeability. – weight: 60 ±10% g/m²; - vapor permeability (24 h): 1375 g/m²; - UV stability without coating: 4 months; - strip breaking load 50 mm, N: 140.	5650
"Tyvek Solid"	Single-layer polyethylene vapor-permeable membrane of increased strength. – weight: 80 ±5% g/m²; - temperature range: from -73°C to + 100°C; - vapor permeability (24 h): 1300 g/m²; - UV stability without coating: 4 months; - strip breaking load 50 mm, N: 250.	6950

Video: a brief overview of roofing film materials of the Ondutis brand

Installation of waterproofing film

The main difficulty in installing waterproofing roof systems, as well as laying any roofing materials, is that the work is carried out at a height, that is, to comply with increased security measures. Otherwise, it is not difficult. To fix the film, you only need a construction stapler and staples.

Glassine prices

glassine

General rules for laying a waterproofing roof barrier

The waterproofing film is laid over the insulation laid between the rafters. If a “breathing” membrane is chosen for the flooring, then it is possible not to provide a gap between it and the insulation material. When choosing a polyethylene film, before fixing it, to create a ventilation gap, counter rails with a thickness of about 30 ÷ 50 mm are fixed to the rafters, and waterproofing material will already be fixed on them. This is especially important to consider if one of the metal coatings will be used for the roof - or

The presented diagram shows a "roofing cake" using a vapor-permeable "breathing" super-diffuse waterproofing "Izospan". It consists of the following elements:

1 - Metal tile.

2 - Wind-hydroprotective super-diffuse membrane.

3 - Counter rails.

4 - Thermal insulation layer (mineral wool).

5 - Vapor barrier film.

6 - Rafters.

7 - Sheathing of the attic.

8 - The crate on which the roofing is attached.

• If a waterproofing film with a width of 1500 m is purchased, then its installation on a pitched truss system is carried out from the eaves. The film is spread across the rafters, that is, along the cornice line, evenly, without folds, and fixed on each of the rafter legs with stapler brackets.
• If an anti-condensate film is selected, then it is not stretched, but, on the contrary, laid in such a way that it sags by 10 ÷ 20 mm in the inter-rafter space.

This type of membrane should be located at a distance of about 40 ÷ 60 mm from the insulation, therefore, when choosing it, it is necessary to provide for the appropriate width of the rafter board and the thickness of the insulation. Cloths of an anti-condensate film, after their flooring, are necessarily glued together with a special moisture-resistant adhesive tape.

The second sheet of waterproofing is laid above the first and overlapped on it. The size of the overlap will depend on the slope of the roof. Recommended material overlap parameters can be found in the table below:

In some cases, for example, on short sections of the roof, where the distance between the rafters allows it, the waterproofing can also be fixed vertically, but the overlap size indicated in the table is also observed, depending on the angle of the roof slope.

• The canvases are laid according to the described principle to the top of the roof, and a canvas is laid on the ridge, which will be found immediately on both slopes. Since the canvas must be overlapped, on the sheets fixed below, the ridge part of the roof is waterproofed last.

Very important nuance! It is only permissible to completely cover the ridge with a film only if a superdiffuse membrane is used, with a vapor permeability of at least 1000 ÷ 1200 g/m² per day.

When using any other film material, a gap of about 200 mm is necessarily made between the waterproofing sheets in the ridge area - it is necessary to ensure normal ventilation and evaporation of condensate.

• After the membrane is fixed, a counter-lattice is fixed on top of it on the rafters, which is a slats 30 × 20 or 40 × 25 mm. They are attached to the rafters with self-tapping screws.
• Lathing boards are fixed on top of the counter-lattice for the installation of roofing. The step of the lathing depends on the choice of roofing, it can be rare, frequent or continuous.

For example, if soft bituminous tiles are chosen to cover the roof, then a continuous crate of boards or plywood with a thickness of 10 ÷ 15 mm is installed. In this case, another layer of waterproofing is additionally laid on top of it, and materials such as glassine or technonicol are often used for this. If bitumen-based waterproofing is used, for example, glassine, then the edges of the canvases are laid on a continuous crate, which will protect against moisture penetration under the waterproofing.

• For hard roofing material, depending on the size of its sheets, boards of a rare or frequent crate are attached to the counter-lattice. The most common size of its installation step for the elements of the crate is 350 ÷ 400 mm.

• On top of the crate, the selected roofing material is laid and fixed.

Organization of the removal of condensed moisture

Separately, it is necessary to say about fixing the waterproofing film on the cornice board, since the condensate formed under the roofing and not evaporated into the atmosphere must be discharged into the gutter. If this is not foreseen, moisture can get under the cornice board, where fungus can form, which will lead to the destruction of the wood.

This diagram shows the design of the system for draining condensate from under the roof along the waterproofing material, wound up on the cornice metal bar, along which the water will drain into the gutter.

If the design of the gutter has a solid fastening to the eaves board, then the waterproofing material can be fixed directly to it and passed under the metal strip.

Another option for draining condensate is formed by installing a special metal element - a dropper, which is fastened to a waterproofing material and brought out under the gutter.

Valley waterproofing

The problematic place of the roof can be called a valley - a fracture of the slope, that is, the junction of two planes under a certain one, which is carried out at a certain internal angle. The crate that forms the valley is two or four boards fastened together at an angle of junction of the roof slopes.

Before installing the general waterproofing on the crate of the roof slopes, on the boards of the valley, a solid sheet of waterproofing material is laid from the ridge to the cornice strips. It should be evenly distributed on both sides of the valley and securely fixed to them with bitumen, brackets or waterproof construction tape.

Only after the installation of the film on the valley is completed, the waterproofing sheets begin to be fixed to the rafters of the roof slopes from the eaves. Horizontal canvases are laid on top of a vertical hydro-barrier fixed on the valley, so a double layer of waterproofing is necessarily formed here. Only after that, a metal element of the valley is laid in the gutter between the slopes, through which the water will drain.

Installation of vapor barrier films

Vapor-proof waterproofing films can also be used as a vapor barrier, but the principle of their installation is already completely different. To understand the difference, the main technological methods of roof vapor barrier from the inside will be given.

There are two main ways to install a vapor barrier membrane - from the attic side and from the outside. The first method is more technologically advanced and is used more often, since when performing work, the master sees the entire truss system, which practically eliminates errors.

Installing a vapor barrier on the roof side

Work is carried out in the following order:

Illustration	Brief description of the operation to be performed
	This diagram represents the location of all elements of the roofing "pie".
	If the first option for fixing the vapor barrier is chosen, then you need to start with sheathing the slopes of the rafter system from the side of the attic. They can be sheathed with clapboard, plywood or drywall. Finishing material fixed on the rafters, or on a crate fixed to them. Exactly interior decoration will become the basis for the flooring on the outside of the roofing frame of the vapor barrier and insulation material.
	So, from the outside, a thin layer of insulation is laid on the prepared base, its thickness can be 15 ÷ 20 mm. This layer will protect the vapor barrier film from punctures and damage by self-tapping screws that fixed the interior trim. If there are no sharp elements, then a layer of insulation is optional. Further, starting from the cornice, film sheets are laid on all surfaces of the base and rafters. Secure the material with a stapler and staples.
	In order for the film to fit snugly at the junctions of the rafters and the inner lining, it is first gently pressed in the corner with a beam, which will help straighten it well.
	Then, the film is fixed with staples on the rafters. Thus, the first layer of vapor barrier is laid.
	The next step is to lay the second sheet of material, overlapping on the bottom. The size of the overlap, as well as during the installation of waterproofing, depends on the angle of the roof slope, and it is quite possible to be guided by the parameters indicated in the table above.
	After laying the overlapping sheets, they are securely sealed with a special waterproof adhesive tape.

After the installation of the film, a heater is laid between the rafters, which is then covered with waterproofing, sheathed with a crate, on top of which the roofing is laid.

This approach has its own significant drawback. It lies in the fact that by choosing this installation option, the work will have to be done in one day, or you can guess the period during which it is guaranteed not to rain.

Installing a vapor barrier in the attic

In the second option, the vapor barrier is fixed from the inside of the attic, and this work is carried out after the installation of roofing materials is completed. In this case, the process goes in the following order:

• The first step is to lay a waterproofing membrane on the rafters.
• Then, the material is fixed on the rafters with slats of the counter-lattice.
• Next, the batten boards are fixed to the slats.
• Roofing is mounted on them and the ridge is closed.

Now that the truss system is closed from atmospheric influences, you can safely insulate it from the attic side.

• Mats of insulating material are installed between the rafters, they are pressed against the sheets of a waterproofing film fixed on the outside.
• Then, the insulation is tightened with a vapor barrier membrane. It can be fixed horizontally or vertically to the rafters. If fixing will be done horizontally, then you need to start fastening the film from below. The second canvas is stretched and overlapped by 150 ÷ ​​200 mm on the first, and so the process is repeated to the top.
• After the vapor barrier is fixed, the canvases are glued together with adhesive tape.

• Then, on top of the film, a crate of timber is installed, on which the sheathing of the attic space will be fixed.

This option is more comfortable than the first one, since half of the work is carried out in safe conditions, under the finished roof.

In conclusion, I would like to remind you once again that you should not indiscriminately purchase any material that is called waterproofing. It is necessary to approach the choice with all responsibility, having studied the characteristics in advance and deciding which of the films is more suitable for a particular coating.

Video: a good example of waterproofing a roof with a vapor-permeable membrane "FAKRO EUROTOP"

When building a new building object or the reconstruction of an old building, it is necessary to pay close attention to the moisture insulation of the roof. It is she who, first of all, is at risk, since she takes on all atmospheric loads.

If the roof is not sufficiently protected from external precipitation and condensate, increased humidity will remain in the room, and this entails the formation of mold and fungus. Against the background of leaks, the interior decoration of the building will quickly become unusable.

All these problems can be avoided by carrying out high-quality waterproofing of the roof in time. It is especially important to protect a flat roof from moisture, which has almost no slope for water flow.

By their own design features flat roofs are divided into:

• Cold (roofing lies on the frame without insulation);
• Ventilated (with grooves for moisture removal);
• Closed insulated (with insulation, but without ventilation holes in the base plates);
• Monolithic (from foam or aerated concrete blocks that do not need insulation);
• Inversion (structures in which there is a heater, protected from below by roofing material, and from above covered with screenings, turf, concrete and other materials);
• Operated (they can accommodate various infrastructure facilities such as sports grounds, courts, swimming pools).

For all types of flat roofs good decision will arrange a drainage system consisting of gutters and catchment funnels.

It is also recommended to create the necessary slope during the installation process. This technological technique is carried out in several ways using inert materials, cement-sand mixtures, additional layers of insulation, specialized systems. The slope will solve the problem of water accumulation, however, the main protection of the roof lies in the insulation device.

Flat roof waterproofing methods

When choosing waterproofing, you need to proceed from the design of the floor, the intended purpose of the roof, its area and other factors. By far the most popular insulating materials are:

Pasting the roof with a built-up coating is a long-known, traditional way of protecting against water. The main component that provides adhesion to the insulated surface is bitumen. The process of applying the material is accompanied by heating the contact surface to the melting point, which explains its name.

Until recently, roofing material was the most popular material among the welded materials, but due to the short service life and a large number of shortcomings, it is currently used less frequently.

Among modern materials, free from most of the shortcomings and providing the best waterproofing, you can note:

To create a reliable waterproofing layer, it is not enough knowledge about modern types materials. Even one of them that costs more may be ineffective if the laying technology is violated.

Before starting work, it is important to understand that the main disadvantages of any welded roll material are the presence of seams, a low coefficient of stretching and not one hundred percent adhesion to the surface to be treated.

When laying built-up waterproofing, it is important to follow these recommendations:

• prepare the surface with high quality, clean it from dust, oil and treat it with a bituminous primer for better adhesion;
• lay the material sheets in several layers with the location of each subsequent layer above the joints of the previous one;
• withstand optimum temperature bitumen base heating. Insufficient heating is the main cause of poor adhesion, overheating leads to burnout of the insulating sheet;
• carry out the deposition of the material on a completely dry surface, otherwise corrosion processes may continue under the waterproofing layer;
• take into account the rate and percentage of shrinkage of the structure when using welded waterproofing;
• carry out insulation work at a positive temperature, in view of the fragility of the frozen material of this type.

It is advisable to use this material for roofs of complex construction: multi-layered, insulated, with a secret drainage system or operated, where great importance is attached to environmental and fire safety.

It is recommended to use it when insulating the roof with fibrous or inert materials(such as expanded clay), reinforced with a concrete screed. The emulsion is sprayed either before or after the insulation, insulating it with a film coating.

Liquid rubber is an elastic mixture of latex and bitumen, which is applied to the surface by cold spraying and creates a durable homogeneous membrane. It reliably protects the roof from leaks at temperatures from -50°C to +80°C, without requiring restoration.

The cover adheres tightly to the base and does not let moisture in. The material provides maximum moisture protection of the internal space and is currently considered the most popular. Its only downside is high price. At the same time, waterproofing with liquid rubber lasts up to 50 years and, of course, pays for itself.

Usage example: TN-ROOF Light system for a non-operated roof without thermal insulation on a concrete base.

Installation conditions: when installing a new and reconstructing an old roof without insulation, when installing a cold attic, when overhaul roofs with the replacement of all layers of insulation.

Algorithm:

1. Technoelast EPP, STO 72746455-3.1.11-2015
2. Technoelast EKP, STO 72746455-3.1.11-2015
3. Reinforced cement-sand screed with a thickness of at least 50 mm

Advantages:

According to the conclusion of the Federal State Budgetary Institution VNIIPO EMERCOM of Russia, the roof structure has a fire hazard class K0 (45) and, depending on the parameters reinforced concrete slab fire resistance limit REI 30 - REI 90, which allows the system to be used as coatings in buildings and structures of any degree of fire resistance and with any class of constructive fire hazard.

Regardless of the brand of material, the process of installing liquid waterproofing looks like this:

• The surface to be insulated is cleaned of debris, degreased and dried with a propane burner;
• If there are chips and cracks in the monolith, they are sealed with concrete mortar, and the protruding elements and reinforcement are removed;
• Using pneumatic equipment, liquid rubber is sprayed with a layer of 3-4 mm, starting from the corner. First of all, seams, areas with elevation changes, as well as brick or concrete fences along the perimeter of the roof are processed. Any protruding elements (rain outlets, chimney and ventilation pipes, fasteners) are covered with a sealed film and treated with liquid rubber 15 cm above the roof surface. After spraying the waterproofing, the excess film is cut along the contour and removed. The sections of transitions on the main surface of the roof are also treated with a spade up to 15 cm - this will help to avoid the formation of seams on the membrane.

Like liquid rubber, this type of waterproofing is characterized by durability, frost resistance and a high coefficient of elasticity. For a roof of a large area, this will be the best solution, since the membrane is available in rolls of solid width.

With this material, you can economically cover the roof of any configuration, minimizing the number of seams. PVC membrane is ideal for a simple flat roof with a slight slope - it is this design that is most popular today, because it is cheaper than a pitched one and provides additional space for organizing utility and infrastructure facilities.

The undeniable advantages of membranes include:

• simplicity and efficiency of installation;
• light weight rolls;
• environmental safety, the presence of a fire certificate.

The peculiarity of laying is that this rolled material does not need to be completely glued to the surface, like rolled welded insulation. Membrane sheets are lined with rows with a slight overlap, and the joints are heated by a burner and reliably soldered.

Usage example: built-up waterproofing of the operated roof for pedestrian loading.

Installation conditions: for efficient and aesthetic use of the roof as extra bed rest, during major repairs or reconstruction with the replacement of all layers of insulation.

Algorithm:

1. Bipol EPP, STO 72746455-3.1.13-2015
2. Extruded polystyrene foam TECHNONICOL CARBON PROF, STO 72746455-3.3.1-2012
3. Sloping layer of expanded clay gravel
4. Reinforced cement-sand screed 50 mm thick
5. Bituminous primer TECHNONICOL No. 01, TU 5775-011-17925162-2003
6. Technoelast EPP in two layers, STO 72746455-3.1.11-2015
7. Drainage membrane PLANTER geo, STO 72746455-3.4.2-2014
8. Leveling layer (gravel with a fraction of 5-10 mm)
9. paving slabs

Advantages:

This solution contains all the best latest materials and technology. The vapor barrier material Bipol EPP reliably protects the roofing pie from moisture. Heat-insulating extruded polystyrene foam T.N. Carbon Prof has ultimate compressive strength and low water absorption. The PLANTER geo profiled membrane not only helps to quickly remove moisture from under the coating, but also protects the waterproofing carpet from mechanical damage. A leveling layer of gravel laid with zero slope ensures a comfortable stay on this type of roof.

In the TN-ROOF Standard Pavement system, it is also possible to lay tiles on a gravel layer using a cement-sand mortar or a dry cement-sand mixture, and the finish coat can be paving slabs of any modifications, used in the improvement of residential areas and is characterized by high frost resistance and resistance to pedestrian loads.

The article tells how to choose and buy waterproofing for the roof. What factors should be taken into account in the first place - the purpose of materials, installation features and, of course, cost. You will learn about the differences between sub-economy and economy class materials, standard, business and premium roofing. Considered options for pitched and flat roofs.

On flat roofs, bituminous rolled waterproofing is the most common way to create a waterproof layer. Source youla.ru

Any modern system the roof of a private house includes a layer of waterproofing. Only for some types of flat roofs, coating or sprayed waterproofing compounds based on bitumen or its modified variants are used. In the vast majority of roofing systems, this function is performed by roll materials.

Functions of waterproofing on flat roofs

At first glance, it seems that rolled waterproofing, as a separate layer, is not needed here. After all, roofing according to its purpose refers to waterproofing materials.

For flat roofs using "soft" bituminous roofing materials, it is. But on condition that the roofing cake consists of one waterproof layer - the top one. And if you look at the description of their structure and composition, you can see that they are very similar to similar materials used for waterproofing the foundation, the basement of a house or the floor of a room with a “wet” mode of operation. The fundamental difference lies only in the fact that such rolled waterproofing for roofing has an upper dressing that protects bitumen from destructive impact sun and improves resistance to mechanical damage (increases wear resistance).

Sprinkling of rolled roofing waterproofing of the upper layer has a characteristic appearance. Source 2gis.ru

In two-layer flat roof types, the protective functions are redistributed. The top coat also remains the main layer, which fully absorbs the effects of precipitation, ultraviolet radiation and mechanical stress. And the lower, purely waterproofing layer, but without sprinkling, "insures" upper layer from leaks in violation of its integrity. It is this device that TechnoNikol recommends when arranging new and repairing old flat roofs.

Functions of waterproofing pitched roofs

At pitched systems not everything is clear.

Mansard roofs, regardless of the roofing materials, as part of the "pie" have a waterproofing layer to protect the insulation from getting wet. These are vapor-permeable membranes that protect the insulation from getting wet, but allow moisture to erode from it.

Cold roofs with metal roofing require the mandatory arrangement of a waterproofing layer of polymer films. And it's not even about the "piece" nature of the coating, the tightness of the joints of which is not always perfect. In this case, it is important to protect the internal space of the attic and the truss system from condensate, which forms almost daily on the inner surface of the roof during daily temperature changes.

This is what condensation looks like on the inner surface of a metal roof Source decorexpro.com

Ondulin and slate on cold roofs can be laid without waterproofing - condensation does not form on their surface. But the manufacturer himself indicates the insufficient reliability of such a roofing pie and recommends it as an economy option. For example, for garden houses and unheated commercial buildings. For residential buildings, waterproofing is recommended as an additional protection against leaks.

Polymer films are laid under modern ceramic tiles according to technology. And the lining carpet under soft tiles is one of the types of rolled waterproofing for roofing on a continuous crate of a pitched roof.

On our website you can find contacts of construction companies that offer turnkey roof installation and repair services. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".

Roll waterproofing for flat roofs

Roll materials for roof waterproofing can be divided into several groups by price. To be precise, the division occurs according to the service life guaranteed by the manufacturer. And the reliability and service life depends on the base material, the composition of polymer modifiers and mineral additives in bitumen, and the total thickness. In combination, these indicators determine the tensile strength, elasticity, the lower limit of the "flexibility" temperature, the upper limit of temperature resistance and the degree of water resistance at a certain pressure of the water column.

Ruberoid with talc for gluing with bituminous mastic - the "eldest" in its class Source hi.decorexpro.com

Another domestic manufacturer, CJSC Orgkrovlya, has four groups: economy, standard, business and premium.

The Filikrovlya group of companies offers in the catalog three groups of roof waterproofing, the prices in which are defined as "standard", "business", "premium".

On a note! The same waterproofing material according to the “basic” name differs in cost not only depending on the thickness, but also on the nature of the top coating. If it's meant for the top layer soft roof, then in its lettering there is the letter “K”, which can be interpreted as “crumb” (another term is “granulate”). The price of such a coating is 10-15% higher than that of the rolled waterproofing of the lower layer, in which the letter “P” is present in the marking instead of “K” - a film (for roofing material and rubemast, instead of a film, talc).

The film that protects the material from sticking during storage and transportation melts easily when heated with a gas burner Source ctd.volokno.ru.net

Below are the prices for 1 m 2 of the main types of waterproofing materials of domestic manufacturers. The indicated cost, although it is “approximate”, allows you to estimate the level of costs for materials.

When calculating the cost of waterproofing a roof, it is necessary to take into account overlaps between panels and on surfaces adjacent to the roof. Lateral overlaps for two-layer laying should be at least 80 mm, for single-layer (materials marked "solo") - 120 mm. End overlaps (elongation of the strip) are at least 150 mm. Connections to vertical surfaces performed in two layers with separate canvases. The first layer must have a horizontal part of at least 150 mm and a vertical part of at least 250 mm. The second layer should be larger than the first: horizontally - by 100 mm, vertically - by 50 mm.

The edge of the side overlap is often marked on the roll itself by the manufacturer. Source legkovmeste.ru

On our website you can find contacts of construction companies that can accept payment by maternity capital. You can directly communicate with representatives by visiting the exhibition of houses "Low-Rise Country".

Sub-economy and economy class

Ruberoid- sub-economy class. Estimated service life is about 5 years. The basis is roofing cardboard. Glued to the base with bituminous mastic, and its consumption must be taken into account in the cost of materials. The price range is 18-35 rubles / m 2.

Rubemast- sub-economy class. Service life 5 years. The basis is roofing cardboard. Welded material. The price range is 50-70 rubles / m 2.

Stekloizol. According to the classification of TechnoNikol - sub-economy class, in the Orgroofing catalog it belongs to the economy class. Service life 5-8 years. The base is fiberglass or fiberglass. Welded material. The price range is 36-82 rubles / m 2.

This is how the Stekloizol waterproofing pallet looks like. IN vertical position rolls must be transported and stored Source domir.com.ua

Bikrost, TechnoNikol. Economy class. Service life 10 years. The basis is fiberglass, fiberglass, polymer fabric. Welded material. The price range is 60-90 rubles / m 2.

Standard

TechnoNicole. Bicroelast- 75-115 rubles / m 2, Bipol - 85-130 rubles / m 2, Linokrom - 70-105 rubles / m 2. The basis is fiberglass, fiberglass, polymer fabric. Service life 10-15 years. Welded materials.

Orgroofing. glass chrome- service life of 10 years, price range 63-107 rubles / m 2. Glass flex - service life 12 years, price range 70-120 rubles / m 2. Elastobit - service life 15 years, price range 80-130 rubles / m 2. Basis - fiberglass, fiberglass, polyester. Welded materials.

Filikrovlya. filigiz– service life of 10-15 years. The price range is 71-96 rubles / m 2. The basis of fiberglass and fiberglass. Welded materials.

Business Class

TechnoNicole. Uniflex, Uniflex EXPRESS, Uniflex VENT, Ecoflex - service life 15-25 years. The price range is 100-180 rubles / m 2. Welded materials.

TechnoNicole. Uniflex C. Service life 15-25 years. The price range is 155-165 rubles / m 2. Self-adhesive material.

Orgroofing. Stekloelast– service life not less than 20 years. The price range is 110-163 rubles / m 2. Welded material.

Filikrovlya. Filikrov– service life of 15-20 years. The price range is 126-178 rubles / m 2.

Premium class

TechnoNicole. Service life 25-30 years. The general name of materials of this class is Technoelast. In addition to the standard purpose, there are modifications for arranging different kind exploited roofs, including "green roofs", or roofs with increased requirements for fire-fighting properties. Technoelast S is a self-adhesive material, Technoelast-FIX is intended for fixing with mechanical fasteners. The price range is 125-220 rubles / m 2.

Orgroofing. Rubitex- service life of 25 years. The price range is 125-210 rubles / m 2. Welded material.

Filikrovlya. Filizol– service life of 25-30 years. The price range is 182-244 rubles / m 2. Welded material.

Filizol - premium class waterproofing from a domestic manufacturer Source baurex.ru

Roll waterproofing of pitched roofs

If you omit the polymer films and membranes that are attached to rafter legs pitched roofs, that is, the only type of bitumen-based rolled waterproofing is lining carpets for bituminous tiles. Even the type of roofing itself is nothing but roll roofing premium class with stone granulate dressing, which is cut into small plates with curly cutouts. And when laid, it imitates a classic ceramic roof.

Due to the "small" size of the plates and the piece laying of soft tiles on a solid base, this type of roofing material for pitched roofs has its own waterproofing technology. IN mansard roofs a superdiffusion layer is laid on top of the insulation waterproofing membrane, attached to the rafters wooden block(provides a ventilated gap), a solid crate is attached to the bar, on top of which a lining carpet is laid and soft tiles. At cold roofs, a solid crate, lining carpet and tiles are immediately mounted on the rafters. That is, regardless of the presence of insulation, this roof always has a “separate” layer of rolled waterproofing - lining carpets.

The places of attachment of the lining carpet to the base are additionally coated with liquid waterproofing Source 4handsmaster.com

Underlayment carpets are fixed to the base with the help of mechanical fasteners. For roofs with a slope of more than 18 °, only valley carpets are required, which are laid in the places of the most likely leaks: on valleys, ribs, ridges. The company TechnoNikol for this type of roll waterproofing of the roof has a price for 1 m 2 - about 400 rubles.

On the slopes of roofs with a slope of 12° to 18°, “ordinary” lining carpets are laid (not counting the valley ones). Their price is comparable to the cost of premium roll waterproofing - about 150 rubles / m 2.

Video description

Clearly about the types of rolled waterproofing, their pros and cons, in the following video:

Video description

Visually about the choice between self-adhesive and built-up waterproofing, see the video:

Video description

About laying rolled waterproofing in the following form:

Conclusion

This short review shows the prices of bitumen-based waterproofing roll materials for any type of flat roofs. Moreover, the cost range covers the materials of the lower and upper layers of a standard roofing pie. And although the modifications of the lower layer are cheaper than the upper, the cost square meter in the actual assessment, it is necessary to double the top bar due to overlap tolerances. You can reduce costs by using "solo" materials, which are laid in one layer, but we must remember that the reliability of such a roof will be lower. And in any case, only specialists in the design of the roof can give an accurate calculation of the costs under the item “roll waterproofing”.