Laminate for underfloor heating from water heating: choice of laminate class, cost, detailed installation instructions

The technology for installing water heated floors appeared relatively recently, but has already won the hearts of many residents of private houses and apartments. Among all the varieties of heated floors, water occupies not the last place in terms of economical operation. This is what makes it popular. The question is what kind of finishing floor covering can be used and how to properly fit laminate onto a warm water-heated floor, because this material is controversial and even capricious when it comes to moisture and temperature changes. Therefore, it is important to purchase a laminate with the necessary set of performance characteristics so that the coating lasts for many years and does not lose its attractiveness.

Laminate flooring for water heating

Installation of a warm water floor

Before moving on to considering the types of laminate, you should understand what a warm water floor is. Water is used as a coolant.

The “warm water floor” system includes:

1. Pipeline.
2. Pump and mixing module.
3. Collector.
4. Pipes (metal-plastic, cross-linked polyethylene).

Basic elements of a water heated floor

Advantages and disadvantages of heated floors

The following positive qualities of heated floors can be highlighted:

1. The versatility of the system regarding the choice of finishing material (linoleum, tiles, laminate, carpet, etc.).
2. Installation of the system does not require major financial investments.
3. Heated floors can be autonomous, not dependent on power outages, or connected to an existing heating system - boiler or central heating.
4. The result of choosing a heated floor is the abandonment of standard heating devices, which allows you to save living space and make it more attractive.
5. The energy efficiency of a residential building increases - thermal energy savings amount to up to 30%.

Warm floors will be appreciated by all family members

The disadvantages include the following:

1. It is rare that the installation of this type of heated floor can be implemented in an apartment. Most often, a water system is used in private homes.
2. It is impossible to regulate the heating intensity of the coolant when connecting it to the central heating system. In stand-alone mode, heating control is limited.
3. Flooding is possible if pipeline damage is detected late.

Types of water heated floors by type of installation

There are two ways to install a water heated floor: using concrete and flooring technology.

Table 1. Methods for installing a water floor

One of our articles will help you calculate a warm water floor. In it you will find a special calculator, calculation examples and instructions.

Where is it advisable to install water heated floors?

Warm water floors are more often used in private houses than in apartments. This is due to the fact that the current legislation of our country prohibits residents from making unauthorized changes to the central heating system of an apartment building.

Changes to the apartment heating system, according to SNiP, can only be made on the basis of obtaining official approval from representatives of the Heating Network and Housing and Communal Services and, as practice shows, this is possible only if the project provides for the organization of autonomous heating of the apartment.

In the event of flooding of the neighbors below, you may incur serious material costs for compensation for damage, restoration of the damaged heating system and payment of fines

There are no obstacles to installing flooring in a private residential building, except that in small rooms it is problematic to position the pipes properly.

Foundation installation on concrete

The installation of the floor surface begins with cleaning and inspecting the screed to identify irregularities and cracks. If defects are detected, a thin leveling screed, 2 to 4 cm thick, is poured. Next, waterproofing is performed: bitumen-roofing felt, or using polymer films.

Then extruded polystyrene foam insulation (EPS) 3-4 cm thick is laid. A reinforcing mesh is mounted on the EPS layer to secure the coolant pipes, or they are fastened with staples to the expanded polystyrene.

Laminate - a brief overview of the material

To understand whether laminate can be used when installing a water-heated floor system, you need to have an idea of ​​the structure and properties of this material.

Laminate flooring is popular in modern interiors because of its main feature - a realistic imitation of the natural pattern, shade and texture of natural wood.

Conventionally, the structure of the laminate is divided into four layers: facial protective, decorative, load-bearing (core) and stabilizing. Let's look at them in more detail:

1. The topmost layer of the laminate, protective, is a transparent polymer, high-strength and wear-resistant coating based on melamine resin and small particles of corundum (crystalline aluminum oxide). The thickness of this layer determines the class of the laminate; the higher it is, the thicker the protective layer.
2. To form the appearance of the floor covering, a decorative layer of special paper is used, with the required pattern applied to its surface using rotary printing.
   Laminate can imitate not only wood, but also ceramics, natural stone, other natural materials, or even have an abstract image on its surface. Laminate with decorative inserts
3. Located under the HDF slab, the stabilizing layer is made of a material impregnated with a special composition that protects the underlying elements from temperature changes and moisture. Creates sound insulation of the floor covering.
4. The load-bearing (middle) layer is an HDF board (high-strength fiberboard). The above layers are laid on it. The density of the slab determines the mechanical strength of the product, and its thickness determines the reliability of the locking connection. The thicker the core, the higher the soundproofing properties of the product and the easier its installation.

   Structure of a laminate board

Important! The main requirements that the load-bearing layer of the laminate must meet are moisture resistance, preservation of geometry under conditions of temperature changes, high rigidity and strength.

What to look for when choosing a laminate for water-heated floors

This question is quite natural and is related to the characteristics of the material.

The most common concerns are related to the possibility of deformation of the coating under the influence of temperature changes. Therefore, it is necessary to choose a laminate with a high level of resistance to moisture, mechanical and abrasive loads.

Which coating is most suitable for warm water floors? Find the answer here.

Example of floor covering deformation

Many modern manufacturers produce material that suggests its use in a “warm water floor” system. The thermal and moisture resistance of the material is indicated by special icons on the information sheet that is attached to the products.

Pictograms for laminate

One of the most important conditions for using laminate flooring in a “warm floor” system is its environmental friendliness and safety for humans and the environment. When the coating temperature increases during operation of the heating system, no harmful, toxic substances hazardous to human health should be released from the surface of the laminate. The evaporation of a minimum amount of toxins that are not capable of causing harm to the body is allowed. The pictograms on the information sheet included with each product package will help you choose the right material.

Table 2. Pictograms for laminate

For use in residential premises, it is recommended to choose products with zero or minimal evaporation class of harmful substances.

Important! Manufacturers producing floor coverings for the “warm floor” system indicate the temperature value for which the laminate is designed. Usually it ranges from 27 to 29 degrees. This is the optimal value at which the coating, under conditions of correct operation, will not lose its integrity and other characteristics for many years. Considering that a comfortable temperature for a floor covering is a value not exceeding 26–27 degrees, this parameter is quite justified.

The advantage of a "warm floor" heating system

An important criterion is the thermal resistance of the floor covering

An important parameter affecting the efficiency of a water floor system is the thermal resistance of the floor covering located above it. According to established European standards, it should be no more than 0.15 m²×°K/W.

The concrete screed, which most often encloses the contours of a water thermal system, quite actively accumulates the resulting heat. However, it is important to provide conditions for this heat to escape into the room.

Correctly made calculations and the material selected on their basis will be the key to a high-quality floor covering

The thermal resistance value for a laminate to be used in a water floor system averages from 0.005 to 0.10 m²×°K/W. The value of this parameter is affected by the thickness and structural density of the product material. But it is worth considering that when laying a water floor, the total thermal resistance of all layers of the coating is taken into account - the concrete screed into which the contour of the heated floor is embedded, the laminate and the substrate, which is necessarily used when laying it. Normally, this figure should not exceed 0.15 m²×°K/W.

Important! When using a floor covering whose total value exceeds the permissible value of 0.15 m²×°K/W, the lower layers of the laminate flooring overheat, as a result of which formaldehyde begins to be actively released and there is a risk of surface deformation. As a result, the base of the floor will warm up, not the room.

Connection type

The strength of laminate flooring largely depends on the type of interlocking joint chosen.

Table 3. Type of locking connection

Both types of locks are subject to reassembly/disassembly, but as practice shows, a “Lock” type lock can be damaged in the process.

Laminate with a “Click” lock can lie on the surface with a difference of up to 3 mm per 1 linear meter. Laminate with a “Lock” lock is more demanding regarding the evenness of the base.

Important! Often, adhesive compounds are used to more firmly connect the lamellas to each other, but in the case of installing the floor covering on a water-heated floor system, it is better to avoid using glue, since the glue will disperse during the heating process and the floor covering will be deformed.

According to experts, when installing a floor with a water coolant, laminate flooring with a “Click” type locking connection is better suited because of their reliability and resistance to deformation during temperature changes.

The process of laying laminate flooring with a click lock

Prices for Tarkett laminate

Tarquette laminate

Panel connection types

The principle of laying slabs is almost the same for concrete and floor surfaces. Connection methods can be: glue and lock. The first option is not applicable in this case, since rigidly fixed panels are deformed when heated, so only interlocking “floating” installation is allowed.

• Click locks. Snap-on products ensuring high reliability of the connection. The planks are connected at an angle of 45° and then snapped into place. At the same time, a characteristic sound is heard, thanks to which the connection got its name. Even when heated, there are no gaps or deformations. The requirements for the quality of the base are moderate.
• “Lock” locks (drive-in). Tongue and groove connection. A perfectly level base is required. Any deformation may cause the connection to break, leading to the formation of gaps.

Compliance with the rules for choosing a substrate and laminate, the technology for laying them when doing DIY work and subsequent operation ensures the installation of a decoratively attractive and durable floor covering.

Choosing a laminate class depending on the room

One of the most important parameters that is taken into account when choosing a laminate is its belonging to a particular abrasion class. More reliable and durable coatings for a warm water floor system are those made from class 32 laminate. When choosing the type of coating, take into account the load level characteristic of the room in which it will be laid.

Table 3. Household laminate

Table 4. Commercial laminate

Initially, the division of laminate into classes of household and commercial types occurred in connection with the level of formaldehyde emission, therefore, household laminate was intended for residential premises, and commercial laminate was intended for public places with short-term stays. At the same time, the latter type of laminate has more serious resistance to abrasive loads. Modern manufacturers offer class 32 laminate without formaldehyde content or with an acceptable amount within the limits of E0 - E1, which allows it to be used in residential premises. This material is most often used in the renovation of apartments and private houses. In light of the installation of a water heated floor system, class 32 laminate can be used if it is appropriately marked and the emission class is not higher than E1.

Kitchen

This is a specific room in the house, subject to special loads in the form of temperature changes, high humidity, various types of pollution and possible mechanical effects on the coating when sharp or heavy objects fall. In addition, all family members and, sometimes, guests are often present in the kitchen at the same time. The coating is subject to pressure from the dining room furniture.

In this regard, the laminate in the kitchen must be durable, resistant to mechanical, abrasive loads and moisture, since its surface requires frequent and careful maintenance. The class of a suitable laminate is 32, 33 with appropriate thermal conductivity and markings that allow it to be used in a water heated floor system.

Laminate flooring in the kitchen is subject to particularly heavy loads

Hallway

The hallway is a passage area; it is the one that connects the living quarters with the street, from where all kinds of pollution and moisture enter its territory. In addition, the coating in the hallway must withstand the impact of dirty, wet shoes and sharp heels. The need for high moisture resistance of such a coating is obvious - in bad weather the floor in the hallway is washed several times a day. For this room, class 32, 33 laminate is recommended.

Hallway - area of ​​increased floor load

Living room

The living room is a common room where all family members gather. But since the floor surface is not exposed to moisture and street shoes, you can use class 22 laminate.

Laminate flooring in the living room

Bedroom

The bedroom has minimal traffic. The laminate in this room must have soundproofing, antistatic properties, a minimum concentration or absence of formaldehyde emissions. You can use laminate class 21, 22. Attention should be paid to the quality of the front layer and the presence of comfortable tactile sensations, because in the bedroom most often people walk on the floor barefoot.

Laminate flooring in the bedroom

Bathroom and balcony

These two rooms, like no other, need a comfortable, warm floor covering, and installing a water heating system becomes a real way out of the situation. But it is important to remember that when using laminate in a heated floor system in these rooms, it should not be allowed to overheat. A sealant is used to treat joints. Another important quality that laminate flooring should have in the bathroom, as in the kitchen, is an anti-slip surface. Laminate class, both for a combined bathroom and for separate baths and toilets, 32 classes are chosen.

Laminate in the bathroom

You may need information on how to properly connect laminate flooring between rooms. You will find step-by-step instructions in a special article.

What materials are best to use?

1. Cement-sand screed best ensures heat transfer from the coolant to the environment.
   Therefore, it is better to choose it for your floors. There are options when pipes are laid in a dry screed. This option is faster, but less efficient in terms of heat transfer. Half of the heat with such a screed will go to the lower floor or basement.
2. you choose must be of high quality . Thanks to this, the boards will not deform and dry out when heated. The thermal conductivity of high-quality laminate is higher than that of low-quality laminate .
3. A high-quality underlay for pipes significantly increases the efficiency of a heated floor. It is best to choose a high-quality substrate with the highest caking resistance .

Average cost of laminate flooring

Table 5. Average cost of laminate for heated water floors as of April 2022

To calculate the amount of laminate per room, use a special calculator. You will find it in our article.

What are the advantages of this gender?

Comparing with other floor devices, we can highlight the most characteristic advantages that distinguish us from others:

• during operation, the temperature of the water floors remains constant at an average of about 50°C, which provides savings on overall heating of the room;
• it is environmentally friendly, it can be installed in any room without fear of an allergic reaction to the components of its system;
• completely safe to meet sanitary and hygienic standards;
• installation equipment is the most common;
• there is no phenomenon of generated electromagnetic flux, as, for example, with electric floors;
• compatible with all types of floor coverings: ceramic tiles, linoleum, floorboards, natural stone, laminate.

Choosing a substrate

Another important parameter that affects the quality of a laminate flooring over a warm water floor is the correct choice of underlay. Its purpose is to level out small differences in the base as a result of the formation of a new screed on which the laminate will be laid. In addition, the underlay improves the soundproofing characteristics of the floor covering and provides additional thermal insulation.

Floor slab “Isoplaat” (Izoplat)

The substrate laid on top of the concrete screed prevents friction of the laminate with the concrete base, eliminating the appearance of extraneous, unpleasant sounds. An important criterion is its ability to maintain the thermal conductivity of the floor covering at the required level without reducing it, therefore the small thickness of the selected material - from 1.5 to 2 mm - plays a significant role.

Nowadays, in light of the popularity of caring for one’s health and attention to the environmental situation in the apartment, coniferous underlay for laminate flooring is especially popular. We will tell you about it in detail in our article.

Construction stores are ready to offer this material in a large assortment. Some laminate manufacturers offer a specific suitable type of underlay for their products.

Taking into account the fact that a water heating system will pass under the laminate, not every substrate can be used

Some manufacturers offer coatings with perforations (small holes), which significantly reduce the thermal resistance of the material while maintaining its elasticity.

Perforated backing

The thermal conductivity coefficient of the substrate should be as high as possible, then it will better transmit heat without retaining it. This material must have the following qualities:

1. Resistant to the “operating” temperature of the “warm floor” system.
2. Environmentally friendly and free of toxins that could be released when heated.
3. Vapor permeability.

Most often, when installing a water heated floor system, cork or polyethylene foam is used as a substrate.

Table 6. Substrate options

Suitable heating systems for laminate flooring

For standard brands of laminate, electric and infrared heated floors are used. Electrical systems are universal and can be used for all types of flooring, including laminate. Kits for a specific room area are offered for sale. Available in the form of mats, cable and film. The floor level rises only 1 cm.

Film infrared floors are inexpensive, the process is less labor-intensive, can be completed in almost a few hours and eliminates the need to fill a screed. Quick installation involves connecting the material spread over the surface to the thermostat.

The disadvantage of electric and film floors is the expensive power supply, the rapid cooling of the surface during an emergency power outage, which often leads to the impossibility of restoring the structure.

Recently, modern laminate flooring options suitable for water floors have appeared on the market.

Choosing pipes for a warm water floor system

The quality of a heating system is determined by the elements used in it with the appropriate characteristics. By choosing the right pipe material when installing a water floor, you can ensure the necessary level of comfort and forget about expensive system maintenance.

Soft pipes for water floors

Recommendations for choosing quality material

Installing a heated floor system is not a case where you can save money by using scraps and scraps of pipes fastened together. Only new, high-quality materials can reduce the cost of installation and subsequent operation of the floor.

To select the right pipes, you must consider the following:

1. Make sure that the material purchased has the appropriate purpose.
2. The pipe should have as few joints as possible - this will minimize the possibility of leakage.
3. What matters is the material of the pipe and its diameter.
4. It is advisable to purchase products from time-tested and reputable manufacturers. Such material may cost more, but it guarantees the quality and durability of the system.
5. It is worth paying attention to the quality of the accompanying fasteners and other products that are involved in creating a heated floor system.

Polyethylene pipes

The heating circuit is subject to specific requirements related to the special conditions of its operation. It is important to choose the right pipes according to geometric parameters and material of manufacture

Geometric parameters of pipes

The diameter of the pipes for installing a warm water floor system is 20 or 16 mm. Sometimes the transverse size reaches 25 mm. When choosing a pipe geometric parameter, it is necessary to take into account the total length of the system. Transportation of coolant through the circuit may be disrupted due to the limited capabilities of the circulation pump, when the total length of the floor exceeds the recommended value and a “locked loop” effect is formed.

The maximum circuit length for a pipe with a diameter of 16 mm is 70 meters, for a pipe with a diameter of 20 - 90 meters, 25 mm - 120 m.

The diameter of the pipe is selected depending on the permissible values ​​​​of the length of the circuit

Pipe material

Filling the circuit with liquid concrete and using a coolant that can cause corrosion of the inside of the pipes significantly narrows the range of materials recommended for use in a water heated floor system. The most suitable materials in such conditions are: polypropylene, copper, stainless steel, cross-linked polyethylene and metal-plastic.

Table 7. Most popular pipe material

Materials and tools

To create a “warm floor” cake, from the ceiling to the floor covering, you need to buy the following materials:

• a set of water heated floors for laminate (boiler, collectors, electric pumps);
• pipes along with special fasteners;
• fittings for polypropylene or coupling-press for metal-plastic;
• roll waterproofing or mastic (only for concrete floors);
• insulation;
• damper tape;
• reinforcing metal mesh;
• metal profile for beacons;
• cement M300;
• sifted river sand;
• fiberglass fiber;
• plasticizers for cement-sand mortar;
• underlay for laminate;
• slats or wedges;
• laminate.

Tools you will need:

For preparatory work:

• perforator;
• level;
• hydraulic level;
• roulette;
• construction cord;
• trowel.

For laying pipes:

• grinder or hacksaw;
• wrench or adjustable wrench;
• soldering machine (needed for joining cross-linked polyethylene).

For the screed:

• concrete mixer (rented);
• bucket;
• rule;
• grinder (rent).

To lay laminate:

• jigsaw or hand saw for cutting laminated boards;
• mount;
• a block or a special metal bracket for padding the lamellas;
• wooden or cast rubber mallet;
• square;
• marker or construction pencil.

Pipe length calculation

The total length of the pipes is calculated by adding the length of each circuit. In turn, the number of circuits depends on the diameter of the pipe. Thus, through a 16-millimeter pipe, a pump of any power can pump water over a distance of 80-100 m (depending on the material of the pipes).

When this indicator is exceeded, a “locked loop” effect occurs - the movement of liquid stops due to the resistance of the pipe walls. Therefore, in large rooms, several circuits are installed. To simplify calculations, the pipe length for each room is determined, and then the number of circuits is determined. The calculation is carried out according to the formula:

L = S/P*1.05+(K*2) , where:

• L—pipe length in m;
• S—room area in m2;
• P - laying step in m (optimal - 0.2 m);
• K is the distance to the collector in m.

For information: a factor of 1.05 is used for the margin for radii and connections.

The value obtained after calculation is divided by the maximum possible length of the circuit for each type of pipe and rounded up. The calculation can be carried out in a simplified manner: multiply the area of ​​the room by 5 - according to SNiP, there should be 5 m of pipes per 1 m2 of floor.

Installation of water heated floors followed by laying laminate

There are several ways to install a water heated floor. Let's look at some of them.

Table 8. Installation of the floor using thermal insulation boards (before pouring the concrete screed)

Table 9. Installation using insulation (before pouring the concrete screed)

Table 10. Pouring concrete screed

Table 11. Laying a warm water floor using the “dry” laying method

The process of laying laminate on top of a water-heated floor system is fundamentally no different from laying it on another base, except for the correct choice of the laminate itself and the substrate. We will omit the installation process itself, but we will give some useful tips.

What tools may be needed when laying laminate flooring? We'll talk about it here.

Table 12. Useful tips for laying laminate flooring

Installation procedure

Installation of laminated panels is carried out on a ready-made screed or flooring system.

• If the building design allows the installation of a water heating system in a concrete screed, then this option is usually chosen.
• In houses with wooden floors, the slabs have to be laid on a stacked structure, since they may not be able to withstand the weight of the concrete screed.

Attention! For both installation options, the base surface must be completely flat.

The process of installing screed on a heated floor system.

Before starting installation work, the concrete screed is treated with a primer to compact the top layer and remove dust. In this case, waterproofing measures are not required; the substrate is laid directly on the concrete. The substrate without the foil layer is laid on the walls with an overlap of 50 mm. The joints are taped with non-metallic tape.

Laminated panels are mounted on a substrate with a gap between them and the wall of 10 mm. It is recommended to start work from the far left corner of the room. To bandage the seams, the slabs are laid offset in rows. So, if in the first row a whole panel is first installed, then in the second row it is shortened by 30-40 cm.

After completing the work with the screed, the substrate under the laminate is laid directly on the concrete, then you can begin laying the laminate.

Malfunctions and their elimination

The design of a water heated floor is simple in structure, so there are not many reasons for malfunctions. Let's look at the most typical ones and how to eliminate them:

1. If the circulation pump does not make a characteristic noise when power is applied, then it is recommended to check the distribution panel on each circuit - the shut-off valves are typically in an open position.
2. “Airing” of the system can occur due to a sharp drop in pressure inside the heating circuit, its overheating, leakage and depressurization of connections, or improper installation of the system. You can solve the problem by closing all the kennels, leaving one, and then running each branch separately with the circulation pump turned on at low speed.
3. To set up the system, it is important to understand the principle of operation of the collector, which directs waste and warm liquid. To adjust the operation of the circuits, use the balancing table. The valve is closed after removing the cap from it. According to the table, the revolutions are determined for each circuit by turning the valve the required number of times.
4. The reason for the low system temperature may be insufficient boiler power, which needs cleaning, maintenance or replacement of the temperature sensor.
5. A decrease in heat transfer occurs if the floor is filled with furniture and covered with carpet, as well as due to poor-quality, unsuitable insulating material.
6. The cause of uneven heating can be not only air, but also poorly organized vapor barrier

Finally, we invite you to watch a video on how to lay laminate flooring on warm water floors.

Tips for quality styling

According to reviews from users and craftsmen, laying a laminated coating on a warm water floor does not differ in its method from the usual one. Once the question of which flooring to choose has been decided and all the materials have been purchased, you can move on to the practical part. By the time of installation, the screed should have stood well and gained the required rigidity and strength. This may take about a month. It is worth waiting in order to reduce the humidity level. Two weeks after pouring, you can turn on the heating. Every day you will need to monitor the temperature of the circulating fluid of the heated floor and raise it by 5° once a day. This will allow the entire surface to be heated evenly without temperature imbalance. Two days before installation, the temperature of the heated floor must be set to the permissible maximum.

The laminate is brought to the installation room not an hour before the operation. It is advisable to do this a day, or even more. This will allow the laminate to gain the temperature of the heated floor and undergo the process of deformation expansion. If this is not done in advance, then problems will begin after installation, when everything is covered with cracks. It is advisable to store the laminate boards closed for the first day, and then unpack them for another day. If the weather is not frosty, then you can unpack the laminate immediately.

The first step is to inspect the level of the surface that was formed after laying the heated floor. Before installing the inat on a warm floor after wet pouring, it is necessary to treat the area with a primer. This will hold the base together and prevent sand and dust from appearing on the surface. The difference in area should not exceed 2 cm per 10 m. There is no need to use a waterproofing layer. The substrate is immediately laid. The latter for heated floors must be used without a foil layer, otherwise heat waves will not pass through sufficiently.

The substrate is laid over the entire area with an overlap of 5 cm on the walls. The excess will be cut off after the process is completed. Adjacent sheets are glued together using regular tape; metallized tape cannot be used. It is necessary to make a gap of 1 cm from each wall. This will allow the laminate to take the required shape without deformation when the temperature changes. You can mark this space for the laminate using wedges or pieces of bars. Subsequently, it will be covered with baseboards and will not be visible.

Everyone begins installing the laminate in the way that is most convenient for them. But professionals advise doing this from the far left corner of the door and moving to the right and down. This way it will be possible to lay the contour more efficiently. If in the first row the initial board was intact, then in the second the laminate board must be shortened by 30–40 cm. This is necessary for bandaging the seams. For a denser arrangement, each row of laminate is tapped with a mallet through a block. An additional skill can be learned from a video on laying laminate flooring.

Features of laying waterproofing materials

The installation of this type of flooring requires special approaches to solving waterproofing issues. This will avoid emergency leaks and protect the floor from moisture, the development of fungi and pathogenic microorganisms. The best solution would be to lay film material.

For these purposes, they usually follow the following algorithm:

1. The base is cleared of debris and removed as much as possible from dust particles with a vacuum cleaner.
2. The waterproofing film is laid with an overlap of at least 5 cm.
3. Using a hair dryer and a blowtorch, all joints are soldered, achieving maximum insulation.
4. Additionally, you can use construction tape, which will ensure the integrity of the coating.