Bituminous waterproofing of buildings and structures. Bituminous mastic for the foundation - step-by-step application technology Bituminous paint for the foundation

Waterproofing a house is a guarantee of its durability, strength and reliability. Using bitumen for the foundation, you can protect the building from the harmful effects of moisture and loosening of the foundation. A well-insulated building structure extends its lifespan. Bituminous mastic is applied simply and financially.

What are the types of bitumen

As raw materials in the manufacture of mastic for the foundation are used sand, cement, mineral wool diluted with petroleum bitumen. According to the type of binding components, they are divided into:

bituminous in its pure form;
rubber-bitumen;
bitumen-polymer.

Bitumen without additives is the most economical option of all types, but not as strong and durable. Rubber-bitumen mastics are more expensive, have excellent waterproofing properties. Bitumen-polymer - require more money, compensating for costs with such characteristics as reliability, durability, moisture resistance.

According to the application method, bitumen for waterproofing is divided into two types:

cold;

Due to the seamless coating of the underground structure, moisture access to it does not contribute to the destruction of the foundation, and the impact on it is minimal. The ease of use of the material allows you to perform waterproofing with your own hands, eliminating the need to spend additional cash for the wages of hired workers.

cold mastic

Most often used during construction work. Its main merit is no need to use special technical means or have certain skills in the industry.

For foundation waterproofing in temperate climates usually water-based or polyester mastic is used. For northern latitudes, a bitumen group with the presence of polymer components is more suitable, which can be used even at sub-zero temperatures. At the same time, both foreign manufacturers and domestic ones guarantee the quality. Cold mastic, depending on the amount of ingredients included in its composition, is:

one-component;
two-component.

One-component mastic can be used immediately after pre-mixing. But on the other hand, her working hours are longer than those of the other group. After completing one of the stages of work, it is enough just to close the container with bitumen until the next moment of use.

With a two-component material, the situation is more complicated. He requires thorough mixing and instant application on the work surface, because it freezes almost immediately. Among the advantages of the material - long shelf life and strength.

Hot type of bitumen

Waterproofing the foundation with hot bitumen is used in exceptional cases when it is necessary give the base maximum strength. The difficulty of working with a hot product is the need to preheat to 300 degrees. This process requires the involvement of professional workers and the use of special equipment.

At the same time, it is important to observe safety precautions and not ignore the rules. If there is no experience in handling hot bitumen, and there is no toolkit either, contact the specialists or choose the option of cold mastic.

Pros and cons of using for the foundation

Using bituminous mastic for waterproofing the foundation, you should familiarize yourself with it distinctive features and their role in the building process.

Due to the exceptional properties of bitumen over the entire area of the foundation a durable and waterproof film is created. It not only clogs cracks, fills pores, but also prevents the appearance of fungal plaque, as well as mold on the surface. Good adhesion indicates readiness to interact with any base material under monolithic walls.

Favorably tolerates temperature changes - withstands fluctuations in the range from -70 degrees to +1200. This allows to carry out construction works using bituminous mastic at any time of the year. After final drying, it envelops the foundation with a membrane that can withstand significant mechanical stress from the outside due to its strength and elasticity.

It shows resistance to aggressive chemical environments and at the same time is characterized by non-toxic application technology and ease of installation process. To do this, you do not need to have special skills or have additional equipment available - the only exception is the use of hot polymer-based bitumen. The price remains reasonable.

Bituminous mastic is easy to transport, and you can work with it quickly, as there are ready-made mixtures that do not need to be diluted and mixed. The coating does not swell, does not crack under the influence of water.

During the period of work with large areas of coverage, the complexity of the process increases. Need to spend time on layer polymerization, but these are not so significant disadvantages compared to the existing mass of advantages.

- This is a homogeneous plastic substance made on the basis of bitumen and various additives that improve its properties. It has excellent physical and chemical characteristics, which make it an ideal waterproofing and adhesive material. After being applied to the surface, the mastic quickly hardens.

Bituminous mastics are used in any field of construction, covering most surfaces with them, including their use:

for the roof

With bituminous mastic for roofing, you can quickly and efficiently seal the surface, without the use of equipment. Mastic can be applied to any cleaned and even roof surface.

Brief instruction-reminder:

Bituminous mastic is applied with a hard brush or brush in a thin layer. On a small damaged surface, it is better to apply with a spatula.
When repairing soft roof the place of swelling is cut crosswise, the interior is cleaned and dried, and then carefully treated with mastic.
Mastic patches are sprinkled with sand to protect them from overheating.
Cracked roofing material after cleaning is covered with hot mastic, when working with which you must be as careful as possible. Coating waterproofing is the simplest, most reliable and economical type of repair work.

Roofing with bituminous mastic:

Roofs treated with mastic have a long service life. If she still needs repairs, it will be very easy to repair the roof.

To repair the roof with bituminous mastic, the following work is carried out:

Eliminate coating defects.
Cut the bubbles present on the coating by making cuts in the form of a cross and dry them.
The surfaces inside the incision are smeared with mastic.
The edges of the incision are connected, aligned and fixed.
A layer of mastic is applied to the cuts, fiberglass is laid in the form of a strip 10 cm wide and the mastic is reapplied.
Large cracks and gaps are treated similarly.

For roofing material

Mastic for roofing material is one of the most reliable methods of its fastening. Mastic helps to securely fasten the roofing felt to the roof, remove air pockets. The surface of the roof is smooth and perfectly withstands loads. Suitable for hot and cold mastic.

For waterproofing

To protect structures in the ground from moisture, waterproofing mastic is used. She waterproofs bathrooms, pipelines, arranges seamless waterproofing coatings in basements, wells and pools.

Buildings treated with bituminous mastic for waterproofing acquire protection from fire.

For foundation

For all types of waterproofing, one cannot do without mastic made from petroleum bitumen, to which organic and mineral solvents and fillers are added.

This mastic is the best waterproofing material due to the following properties:

elasticity;
frost resistance;
good adhesion;
resistance to ultraviolet radiation;
ease of application.

The foundation is treated in several layers with bituminous mastic from all sides, making it completely hydrolyzed. The cheapest coating is with hot bitumen, but it is more difficult to work with it. To avoid difficulties, it is better to choose a cold bituminous mastic with organic solvents (polymer). To work with it, you only need brushes and a spatula.

To process the inside of the foundation, water-based mastic is used. It has a neutral smell and dries quickly. In industrial construction, bitumen-latex emulsions are applied mechanically.

Waterproofing the foundation with mastic is carried out using brushes, rollers, any tools that can be used to apply the composition to the surface. The mastic is applied in two layers, maintaining a technological pause between them. Its value depends on the characteristics of the composition.

On the video - how to properly waterproof the foundation with bituminous mastic:

For floor

For floor protection devices, modern bituminous mastic is often used. It is non-toxic and dries quickly. Bitumen mastic for the floor does not emit unpleasant odors. Most often it is used for waterproofing the bathroom.

For parquet

For fixing parquet floors on concrete or cement-sand screeds, cold mastics are used:

bitumen-cookersalt;
bitumen,
rubber-bitumen;
coumaron-cookersalt.

The use of cold mastics is due to the fact that their setting is slow, which allows you to accurately connect the strips into a ridge and groove. On bituminous mastic, you can lay parquet with an oblique edge.

For wood

Bituminous mastic MBU is used for wood processing. Processing is especially important wooden surfaces that are buried in the ground. If the mastic is very thick, it is heated with the lid open and thoroughly mixed after that.

For linoleum

Each type of linoleum is put on "its" mastic:

Bituminous for a fabric basis.
Dispersion - for a heat-insulating substrate.
Mastics with the addition of synthetic resins and rubbers are suitable for baseless linoleum.
Before laying linoleum on mastic, the floor is pre-primed. Mastic is applied to the floor with a notched trowel.

Gluing linoleum to mastic

For laminate

When laying laminate on bituminous mastic, the floor is warm, sound and moisture insulated. Equip it in the same way as when laying parquet.

For metal

For metal and automobiles, bitumen-polymer and rubber-bitumen mastics are most suitable. It perfectly protects the car, but before processing, the metal must be cleaned of dirt and rust, washed and dried.

For concrete

Although concrete is a monolithic product with increased strength, it always has microcracks and small pores through which water easily seeps through. Because of this, the reinforcement may rust over time, the foundation block may burst and sink into the ground. Therefore, concrete structures are treated with bituminous mastic, which reliably protects all cracks, pores and interpanel seams.

To do this, use various mastics made from:

solid bitumen;
liquefied;
waterproofing bitumen-rubber.

For expansion joints

Commercially available hot bituminous or cold mastics can be used to seal joints in concrete pavements. They withstand more than 200 defrosting and freezing cycles.

Bituminous mastic for bridge expansion joints:

For asphalt

To repair asphalt and seal the roadway, special mastics are used. They withstand strong compression and stretching, have good adhesion, can be used for low temperatures. Within an hour after work pavement can be exploited.

For ovens

To perform work on facing fireplaces and stoves, heat-resistant bitumen-polymer mastic is used. It withstands temperatures up to +1200 °C and above. It dries quickly, does not emit odor, and prevents the development of fungi and mold. It is a heat-resistant, reliable, durable, bactericidal adhesive material.

For the pool

To seal the pool, thiokols and rubber-bitumen mastics are most often used. Mastics harden right in the seam and eventually turn into an elastic black sealant. To fill the seams use a pneumatic syringe with replaceable cartridges.

Application of special mastic on the bottom and walls of the pool

For Styrofoam

Recently, bituminous mastic began to securely attach polystyrene sheets to metal, concrete, expanded clay, brick and wood. During work, vertical sheets of expanded polystyrene are fixed with temporary supports for a reliable connection, and a load is placed on the horizontal sheets.

How to work with mastic

To create an effective waterproof layer, the bituminous mastic is vigorously mixed using a drill or mixer.

For ease of application and increase plasticity, you can heat it. Since the layer is elastic, it is better not to apply hot mastic on surfaces that are often subjected to strong mechanical stress. A hot solution penetrates into the pores better, as it has an increased fluidity and, therefore, adheres more strongly to the material being processed.

The preparation of hot mastic must be carried out, observing safety precautions. more beneficial for large scale projects. Cold mastic is sold ready for use, it is safe to use and more convenient. But it costs more than hot.

They work with bituminous mastic at air temperature from -10° to +50°C. The mastic itself should be heated in a water bath to +15 degrees and above.

When working with mastic, you need to be aware of its fire hazard and toxicity. It is forbidden to heat it up open fire and also store near the source of fire. If work is carried out indoors, it is necessary to create ventilation.

Preparation of hot bituminous mastic:

Consumption and consumption rate

Consumption of bituminous mastic per 1m? depends on its type. The consumption indicator depends on the type of material. Hot bituminous mastics do not decrease in thickness after hardening, therefore they are considered non-shrinking. To apply bituminous mastic in one layer with a thickness of 0.2 cm, it is required from 2.0 to 2.4 kg / m2.

An important characteristic of mastic consumption is the indicator of dry residue content. This is its amount that remains on the treated surface after it has dried and hardened. With a small dry residue, the consumption of the original mastic increases in order to form a film of a given thickness.

In the dry residue, to create a layer 2 mm thick, 3.4-3.8 kg / m? bituminous mastic. Most ready-to-use mastics have a solids content of 20 to 70 percent.

Applying mastic

In order for the mastic to adhere well to the treated surface, it is necessary to carefully clean the treated area from all types of contaminants. After that, the finished surface is thoroughly dried and heated. Thanks to this approach, the mastic will be applied evenly and you can save on its consumption.

The most popular tool for applying it is a brush or roller. They apply mastic regular paint without rubbing hard into the surface. After drying, re-processing is done.

Bituminous-latex compounds can be applied by machine airless spray. With this method, a uniform layer is obtained, and material consumption is low.

You can also apply the mastic using bulk application, for this it is poured onto the surface and leveled with scrapers, mops or long-handled rollers. Although with this method, productivity is higher, more material is consumed.

What can dilute the mastic

Bituminous mastic is diluted with white spirit, solvent, toluene or kerosene until the required consistency is formed. After that, it is thoroughly stirred.

A few more words about the basics of using bituminous mastics:

To protect concrete structures from destructive impact moisture perform a complex of measures. One of the options is to close the access of water to the fittings concrete product is . It is often used for painting or plastering foundations, as well as in everyday life for covering concrete floors and interfloor ceilings in bathrooms and showers.

Despite the fact that concrete is a monolithic product of increased strength, it has small pores and microcracks. Through them ground water can seep into the inner frame of steel reinforcement. It provides strength and resistance to bending and breaking of the entire concrete element.

It can be imagined that if the reinforcement rusts over time, then the multi-ton load of the building on the foundation will lead to the fact that the foundation block or the supporting concrete pad will burst and sink into the ground. This will cause deformation of the whole house and cracks in the walls.

To prevent this from happening, all concrete structures that may come into contact with water must be isolated from it. For this, one of the types of protection is used - bituminous. It will reliably clog all the pores and cracks in the concrete.

Materials for bituminous waterproofing

The following materials are used for painting or coating concrete elements:

Solid bitumen BN-3, BN-4, BN-5
Liquefied bitumen BN-3, BP-5, DH-1V
bitumen-rubber mastics
Mastic bituminous polymer waterproofing

For painting concrete structures, solid bitumen is melted in a strong metal container (barrel or bucket). During the melting process, bitumen is dehydrated, which is extremely important when it is applied to a concrete surface.

It is important to know! Before applying the coating concrete pavement must be dried thoroughly.

Otherwise, moisture will boil on contact with hot resin and bubbles will form under the insulation layer. Detachment of the bituminous layer will not clog pores and cracks in concrete.

Molten bituminous coating is applied with a brush or wide brush. Hot bitumen is collected in a metal ladle, a brush is dipped and the melt is applied from top to bottom. The next strip is carefully rubbed into the concrete surface with an overlap on the previous one of at least 10-15 cm.

Note! The bitumen cooling time in the ladle from the temperature of the liquid state equal to +160-170 degrees to the solidification temperature is about 1-2 minutes. This is the main disadvantage of working with solid bitumen.

Therefore, a minimum of 2 people are required when performing hot painting. The stoker maintains the fire and adds pieces of crushed bitumen to the container. The performer collects a bucket of 20-25 kg and makes a coating. Bitumen consumption per 1 m2 is 1.5-2 kg. The layer thickness must be at least 2 mm.

To check the layer thickness and clarify the bitumen consumption rate, it is necessary to cut a square segment measuring 2 x 2 cm in an arbitrary place with a sharp knife. Its thickness is measured with a caliper. If necessary, waterproofing is applied twice.

Worth knowing! Bitumen becomes brittle and cracks when the temperature is below zero, so it is not recommended to use it in cold weather.

After processing the concrete structures of the foundation, it is necessary to backfill and compact the soil. If metal pipelines were processed, then they also need to be covered with a layer of thermal insulation.

Liquefied bitumen does not require constant heating. In this case, finely chopped resin is poured with a solvent. Most often it is automotive low-octane gasoline. After thorough mixing, a mass similar to jelly is obtained.

Liquefied bituminous mastic for waterproofing is conveniently applied with a brush and a brush and you should not be afraid of quick hardening. Such a mastic polymerizes after 24 hours on outdoors. It is more resistant to frosty conditions, but mixtures with gasoline are combustible, and their vapors are explosive. This requires special security measures from performers and the complete exclusion of smoking and open fire.

The use of bitumen and polymer mastics

Bitumen-polymer coating significantly outperforms bituminous and bitumen-thinned coating in its characteristics. The polymers included in its composition have excellent adhesion and do not require thorough drying of the concrete surface. However, when using it, constant filtration of water and puddles on the surface is unacceptable.

Such mastics are easily applied at low temperatures. They can also be thinned with gasoline, kerosene or white spirit. Gasoline "kalosh" is also suitable, although solvents must be dosed moderately so as not to turn viscous into broth.

Coating waterproofing bituminous mastic is applied with a brush on concrete and metal constructions. The interval between subsequent layers is 24 hours. Such mastics are great for waterproofing bathrooms, toilets and showers in apartments and private houses.

The use of bituminous mastic as waterproofing material- this is a time-tested way to protect the lower part of the foundation from the effects of water. Bitumen is applied seamlessly and allows you to protect reinforced concrete, wood and other types of base from moisture, the consumption of waterproofing material is not large.

Advantages and disadvantages

As with any waterproofing material, the bituminous mixture has its advantages and disadvantages.

Processing with bitumen makes it possible to make a seamless layer;
The consumption of waterproofing material is negligible;
Any type of base can be treated with bitumen;
Processing is possible without assistants;
Usually processing does not take much time;
Bitumen has a long service life;
Work can be carried out at any time of the year;
The protective waterproofing layer is resistant to aggressive environments;
Mastic can be bought at any major building market;
The waterproofing layer does not swell from exposure to moisture and does not crack;
Special components in the composition protect the base from mold and mildew.

The disadvantages of such waterproofing include the complexity of the work when processing a large base. Sometimes you have to wait until the waterproofing hardens.

As a result of processing the foundation with bituminous grout, you will receive:

Increased building durability.
foundation reliability.
Excellent protection against penetration of mold and mildew.
No high humidity in the rooms.

Mastic for the base: composition, types and features of work

Bituminous waterproofing is a homogeneous mass consisting of modifiers, acetone (or other solvent) and a base. Components that protect the base from corrosion, mold and fungi can also be added to the composition. The main component of such waterproofing is bitumen - a viscous composition of natural origin.

There are several types of bituminous waterproofing:

Bitumen-polymer waterproofing;
Bitumen-emulsion waterproofing (used in preparatory processing, other types of mastic are applied on top of it);
Construction bitumen (for work, bitumen is heated to 300 degrees. The consumption of such material is much higher.);
Bitumen-rubber waterproofing (the mixture is applied heated).

Now bitumen-rubber (bitumen with the addition of crushed rubber) and bitumen-polymer mastics are especially popular. They have an increased service life (the service life is 25-30 years longer than that of conventional mastics).

Consumption of bituminous waterproofing

For an accurate calculation required material you need to find out the area of \u200b\u200bthe base, to know what material was used for its construction.
The presence of chips, holes and microcracks increases consumption.
If bitumen is used as a link between the base and roll waterproofing, then the consumption will be insignificant (1.5 kg per 1 sq. M.).
If bituminous mastic is used as the main means of waterproofing, then the layer must be at least 3 mm (3.5 kg per 1 sq. M.).
If you use hot mastic, then its consumption will be greater.
On the mastic label, the manufacturer indicates the approximate consumption.

Stages of waterproofing with bituminous mastic

Stage 1

To carry out waterproofing work, you need to properly prepare the base. This will help reduce consumption, and increase the adhesion of the layer to the foundation surface.

If the surface to be treated has many holes, chips and cracks, it must be rubbed with a concrete solution (thoroughly mixed). If you do not prepare, the bituminous layer may burst and then additional application of mastic will be required, and this will significantly increase its consumption.

If the base to be processed has sharp scallops, then they must be removed with a grinder. sanding attachment. The sharp corners of the base should also be processed (cut and rounded).

The entire surface of the base must be free of cracks, recesses and protrusions, sharp corners must be rounded. With the help of simple preparatory work you can reduce material consumption by about one and a half times!

Having made the surface smooth, the base should be cleaned of dirt. Then dry the entire surface to be treated with a building hair dryer. This will protect the mastic from swelling and cracking.

A simple test can be performed to ensure that the substrate has dried sufficiently. Take a plastic film and put it on the foundation for a day. If the next day moisture does not appear on it, then you can start working, and if moisture appears on the film, then the foundation needs to be dried.

stage 2

To reduce the consumption of bituminous mastic, and improve the adhesion of the material to the surface, primer treatment with a primer is required. The primer must be selected according to the mastic you have chosen.

The primer is applied evenly over the entire base and in one layer. A roller can be used to apply the primer with primer. After completing the application of the preparatory layer, it needs to dry (from two to five hours).

Layers of mastic should be continuous and without breaks. Bituminous waterproofing is applied with a roller or brush from the bottom up. Subsequent layers of waterproofing are applied after the previous ones have completely dried.

After finishing the application of the last layer, the surface should be sprinkled with soft turf. This will increase the life of the waterproofing.

To reduce the consumption of waterproofing mastic, you need to carefully monitor the thickness of the layers. A thickness gauge can be used to accurately control the application.
When applying bituminous waterproofing mastic in several approaches, each of the layers should not be more than 1.5 mm.
For regions with high humidity and frequent rainfall great solution there will be waterproofing from polymer-bitumen mastic.
The bituminous waterproofing layer can be applied using airless units.
solidification different types mastics may take different times. If you doubt whether the mastic has dried, just touch it. If the finger sticks, then you should wait for some more time. On average, complete freezing takes five hours.
On horizontal and vertical surfaces, the consumption of waterproofing material may vary.
The purchase of bituminous mastic should be approached responsibly: buy material only from trusted suppliers and in large construction hypermarkets.

Bituminous mastic for foundation waterproofing updated: February 26, 2018 by: zoomfund

Coating waterproofing is one of the most common methods for waterproofing a foundation, which is due to the ease of applying mastics, the absence of seams, the possibility of using complex configurations on building elements and mechanized application (sprayed waterproofing).

The main disadvantage in the use of these materials is shrinkage, which can lead to rupture of the waterproofing. The mastic is applied from the water pressure side (on the clamp), and before backfilling, the coating waterproofing requires mandatory protection, which can be made in the form of protective walls, using flat drains (profiled membranes), thermal insulation (XPS), etc.

Coating waterproofing should be used mainly to protect against capillary (ground) moisture and soil water in draining and low-moisture soils, when groundwater is 1.5-2 m below the basement floor level. With hydrostatic head, it can be used if the pressure does not exceed 2 m for waterproofing from bituminous mastic and 5 m for waterproofing from bitumen-polymer mastic.

Coating waterproofing from pure liquefied bitumen is not recommended due to insufficient durability of bituminous coatings.

Waterproofing thickness

Bituminous or bitumen-polymer mastic should be applied 2-4 layers. The total depends on the depth of the foundation (see table).

Due to the fact that they are applied in a liquid state, compliance with the design thickness of the waterproofing layer plays a decisive role. In this regard, the control should include measurements of the thickness of the coating in wet and dry conditions. Wet film thickness is controlled with a comb or disk, dry film thickness is measured with universal thickness gauges.

The disadvantage of mastic coating is that it is difficult to achieve a guaranteed thickness of the insulating film, especially on large slopes and uneven surfaces. Therefore, it is necessary either to carefully prepare the surface, or to increase the consumption of material. Both lead to an increase in the cost of coverage.

Consumption per 1 m2

Consumption of coating bituminous waterproofing in 2 layers - 2.0-2.5 kg / m2

Interlayer intervals

Each layer of bituminous mastic is applied only after the previous one has completely dried or hardened. If the subsequent layer of mastic is applied over the wet previous one, this may lead to delamination or lack of necessary adhesion of the mastic coating to the base.

A waterproofing layer made of mastic is considered dry if its surface is not sticky for inspection. The drying time of the mastic layer depends on the composition of the bituminous mastic, temperature and humidity, both the ambient air and the base.

Waterproofing device (technology)

Foundation preparation

The base for coating waterproofing must be solid and solid, with rounded (radius 3-5 cm) or chamfered corners and edges. At the transitions from horizontal to vertical surface fillets (fillets) must be made to ensure smooth mating of intersecting planes.
concrete surface with big amount shells from air bubbles in order to prevent the formation of bubbles bursting after 10-15 minutes in a freshly applied mastic layer, they are rubbed with fine-grained cement mortars from dry building mixes.
For mastic waterproofing, “scallops” with sharp and prickly protrusions, which form at the joints of formwork sheets, are especially dangerous, which must be removed.
The base surface is cleaned of dust, dirt, debris.
The surface to be waterproofed must be dry.

Substrate moisture- the most important indicator of surface readiness for applying bituminous mastic. The presence of moisture leads to the formation of blisters or delamination of the mastic from the surface.

Permissible surface moisture for bituminous (bitumen-polymer) mastic should be no more than 4%. Water-based mastics can be applied on damp (up to 8%), but not wet substrates.

The simplest test for moisture involves laying a 1x1 m polyethylene film on the prepared concrete surface. If condensation does not appear under it in 4-24 hours, then applying bituminous waterproofing is possible.

Primer application

To improve the adhesion (adhesion) of the mastic to the concrete surface, the prepared base is primed (with a ready-made bituminous primer).

The primer can also be prepared from bitumen (grades BN 70/30, BN 90/10, BNK 90/30) and a rapidly evaporating solvent (gasoline, nefras), diluted in the ratio
1:3-1:4, by weight or bituminous mastic with a heat resistance above 80 ° C, diluted to the desired consistency.

The type of primer (primer) should correspond to the applied mastic.
The primer composition should be applied over the entire surface in one layer, at the junctions along the grout from a cement-sand mortar - in two layers.
Bituminous primer is applied to the surface with a roller or brush. The base, dried after priming, is ready for the start of the coating waterproofing device.

Applying mastic

Bituminous mastic is applied to prepared surfaces humidifying side (water pressure side).
Mastic is applied in layers with a roller, brush, spatula, or in bulk. Each layer should be continuous, without breaks, of uniform thickness, parallel stripes. The direction of applying bituminous mastic is from bottom to top.
The next layer of mastic should be applied after the previous one has hardened and dried (no traces of binder should remain on the attached tampon).

Reinforcement of waterproofing

In places of junctions and interfaces where cracking is possible, locations of cold joints, identified cracks in monolithic concrete, etc. defects, the coating waterproofing must be reinforced.

The fiberglass material is recessed into the first layer of mastic and rolled with a roller, which ensures a tight fit of the panel to the base without the formation of voids under it. After the "bituminous mastic - reinforcing material" system has dried, a second layer of mastic is applied. The overlap of a strip of fiberglass or fiberglass on both sides of the axis of the problem area must be at least 100 mm.

The presence of a reinforcing material in the waterproofing coating leads to the distribution of the tensile load over the entire strip of insulation, reduces the elongation of the material at the crack opening, which ensures its continuity, reliability and durability of the waterproofing.

Backfilling of walls with coated waterproofing should be carried out only with soft soil; in this case, a protective coating (screeds, walls) is not required.