What kind of insulation to use for a warm floor. The choice of insulation for underfloor heating

If you were wondering about the procedure for installing a warm floor, then you paid attention to a kind of cake that you have to lay. One of its layers is insulation under a warm water floor. But if the floor heats up, then why is there insulation? And if you need it, which of the abundance to choose? This article will help you not to get confused in the variety of heaters and choose exactly the one that will show itself best in specific conditions.

Insulation as an important component

The task of underfloor heating is not only to heat a certain area. In this case, it is important to achieve minimal heat loss. One contour of a laid pipe with a diameter of 16 mm can easily warm up a screed with a thickness of 15 cm. It should be borne in mind that heat does not only spread upwards. It goes down as well. If there are neighbors below who heat their premises well, then this will not be so noticeable. But if there is a basement, then the heat loss will be noticeable. This will be noticeable not only in the air temperature, but also in the media bill.

Another very important reason why insulation is important in the overall pie is the uniformity of wave distribution. Due to the presence of insulation, the temperature is not concentrated only at the place where the pipe passes, but is transmitted to the entire surface. Some types of insulation make it possible to facilitate the process of creating a pattern along which a pipe of a warm water floor is laid. The main types of insulation are polystyrene derivatives, products from mineral components and polyethylene. Each of them deserves a separate consideration.

Mineral slab

It is known to almost everyone and has been used in production and construction for a long time. Their predecessors are glass wool, which had to be rubbed off for a long time so that your hands would not itch. But for underfloor heating, mineral wool, which is supplied in rolls, is not suitable. This is due to the fact that its rigidity is insufficient, and due to such insulation, the flooded screed subsides. Only basalt or other, which is sold as slabs, is used. This insulation has an excellent compression resistance. Other positive aspects include;

• resistance to moisture;
• good thermal insulation;
• sufficient sound insulation;
• resistance to fire;
• resistance to chemical solvents.

Mineral insulation is also called stone wool, because it is made from molten rocks. Such insulation has no harmful impurities and emissions. For a warm floor, insulation slabs with a density of 175 kg per m 3 are suitable. Of the disadvantages of such a heater, it is obvious that there are pores that allow water and steam to pass through. Therefore, during installation, additional waterproofing will be required.

Polystyrene boards

Insulation, which consists of expanded polystyrene, is also not new. Initially, such a material is known to builders and users as polystyrene foam. But pure foam has its drawbacks. Although it has excellent thermal insulation properties, such insulation is very fragile in compression. This is due to the large air bubbles that form during the manufacturing process. To eliminate this lack of insulation, it was necessary to change the technology. Thanks to this, the extrusion technology appeared. Its essence lies in the fact that the formation of the web occurs under high pressure. Thanks to this, the balls with air in the insulation take the correct shape and become smaller. This allows the thermal conductivity to be reduced at the same thickness compared to conventional foam. The choice of many falls on insulation in the form of extruded polystyrene foam for the following reasons:

• light weight;
• ease of installation;
• compression resistance;
• lack of toxic emissions;
• excellent waterproofing properties.

Such insulation is rarely called according to its composition, more often you can find such a name as "Penoplex". In fact, this is the name of the plant that produces it. Insulation under a warm water floor is better to take one that has locking ends. They are cut in half to eliminate cold bridges. There are also options for insulation boards with bosses. These are small guide protrusions. Thanks to them, the pipe is fixed without any additional clips and it is easier to bend it. Insulation with a thickness of 5 cm and a density of 35 kg per m 3 is suitable for a water-heated floor, usually it is labeled as "comfort".

Note! Insulation made of extruded polystyrene foam is afraid of the effects of various solvents and burns well, emitting toxic smoke. When working with insulation, it is important to avoid the presence of these factors.

Roll material

There are situations when it is necessary to fill the screed, but the height of the ceilings does not allow this to be done too much. In order to reduce the overall height of the cake, a roll of insulation is suitable. Most often, foamed polyethylene is its representative. By itself, this material does not have sufficient density to guarantee high thermal insulation properties, therefore, foil is applied to one or two of its sides. It allows you to reduce the thermal conductivity to 0.037 W / m × ° C. Such insulation is commercially available with a thickness of 3 to 10 mm. Many people choose this particular material, because:

• has a low weight;
• easy to install;
• has a low cost;
• it is often marked for styling.

Foil is a metal, so it can react with water or other components that go into the screed mixture. To prevent damage to the insulation, you will need a waterproofing layer or take such insulation, which is initially covered with an additional layer of polymer. The disadvantages of the material include a slight resistance to compression. Over time, polyethylene foam tends to shrink, which will affect its effectiveness.

Cork insulation

If you are an adherent of everything natural and want the insulation not to contain chemical impurities, then you should look in the direction of cork slabs. It is a natural material best known for its corks used to cork wine. The thermal conductivity of such a heater is on a par with high-quality foam, in the region of 0.037 W / m × ° C. There are no problems with its installation either. There are insulation options that come in rolls. Sufficient rigidity of the material will not affect the strength of the future screed. The disadvantages are the rather high price and availability of the material not in all regions. The cork also absorbs moisture well, so it will require several layers of waterproofing membrane.

Insulation for various bases

Underfloor heating is installed not only in apartments, but also in private houses. Some heaters for warm water floors are universal, others are more suitable for specific situations. For example, in some homes, thermal insulation has to be laid on the ground, in others on wooden logs. For the first case, one that absorbs moisture well is not suitable. It is worth considering general cases in more detail.

Floor slabs

Concrete floor slabs are most often used in apartment or private houses with basements. In new buildings, they can be without a screed, so they will require additional maintenance. Due to the presence of a metal base in the floor slabs, they conduct heat very well. And this means that if you install a warm floor on them, then its efficiency will be low. That is why a rough screed is applied before starting work. Some craftsmen use expanded clay as a filler for concrete. It creates an additional layer of air that blocks the escape of heat. If there is a basement or other room below where there may be dampness, then it is advisable to lay waterproofing under the screed.

As an insulator for a warm floor, which will be laid on top, any of the listed heaters is suitable. For moisture-sensitive ones, waterproof the rough screed and the insulator itself from above before pouring the fine screed. Concrete slabs withstand the load well, so there should be no problems with the thickness of the screed.

Warming on the ground

There are times when insulation has to be carried out directly on the ground. The reason for this may be the special design of the house. Before starting work, it is necessary to prepare the foundation well. To do this, you will need to go deep to such a level that from the lowest point to the highest point of the future floor is 50 cm. The bottom layer of soil is well rammed. If there is excess moisture in it, then it is necessary to dry it. This can be done by constant ventilation or using heat guns.

A gravel cushion is laid on top of the compacted soil. Its thickness should be at least 20 cm. It is leveled and brought out approximately under the level. Further, medium-grained sand is filled up by 20. It is compacted as much as possible and is brought out under the level. The next step is waterproofing, which will prevent the development of fungus and excessive heat transfer. Insulation is laid on the membrane. In this case, it is better to use Penoplex. It has excellent compressive strength and does not absorb moisture. It is better if its thickness is 10 cm. Another layer of waterproofing is laid on it, then a reinforcing mesh and a pipe underfloor heating is laid, followed by a concrete screed.

Note! If in your area groundwater is at a shallow depth, then it makes sense to think about building a house on a strip or pile foundation. In this case, there will be less chance of moisture rising into the living space and the insulation will last longer.

Floor in a wooden house

Insulation of the floor under the water in a wooden house has several options. If the house has a rough concrete floor, then you can act as in the case of floor slabs. If there is dry bulk insulation under the beams, then you can use the underfloor heating system with a dry screed. As a heater, you can use extruded polystyrene foam with bosses. But first it is necessary to level the surface of the wooden floor and lay waterproofing on it. If the ceilings allow, then it is good to use insulation with a thickness of 10 cm.

In the case when the house is on a pile foundation, then it will be necessary to insulate the subfloor well. For this, the finished floor is dismantled and the state of the lag is assessed. If a fungus has already appeared on them, then everything will need to be scraped off and treated with an antiseptic. Next, boards are packed on the lower end of the lag to form a small cavity. Waterproofing is laid into it, and insulation on top. You can use stone wool or expanded polystyrene. In the second case, with the same thickness with mineral wool, the effect will be better. The next step is to install another layer of waterproofing, and then a warm floor system with a dry screed. Some information about the process of warming can be gleaned from the video:

Conclusion

As you can see, there is a large selection of heaters for a water-heated floor. Some of them are inapplicable in certain situations due to their characteristics. Others are versatile. If you are faced with the task of installing a warm floor, first of all, evaluate the existing base well and analyze what condition it is in and whether repairs are necessary before laying the insulation.

The underfloor heating includes a number of elements that perform various functions. One of them is thermal insulation for a warm water floor, on which the efficiency of the entire system directly depends.

The reason for the insulation of floors

Insulation material for warm floors has the form of a heat-reflecting coating that creates a barrier to the movement of air in a specific direction. Strictly speaking, we are talking about a screen that retains heat in a heated room and prevents it from leaking down the ceiling. Thanks to the backing, precious heat is not wasted on heating the lower floors or basement.

Thanks to the underlay, a good uniformity of heat distribution in the room is achieved. If you do not equip the insulating layer, the energy will be emitted only by the pipes of the circuit. This will create cold and hot islands on the sub-floor. Thanks to foil-clad thermal insulation, stabilization of the circulation of convection flows is achieved. The fact is that part of the thermal energy is distributed through infrared radiation. The presence of a reflective metallized layer allows these rays to be redirected inside the room.

The developers of modern heat-insulating layers have provided convenient fasteners, which greatly facilitates the installation work on laying pipes. In this case, the contour is installed according to a previously thought out scheme, fixing with convenient clips. Then you can safely proceed to pouring the screed or finishing without fear of shifting the pipes. In this way, significant savings in time and effort are achieved.

Insulation for a water-heated floor can have different thicknesses, depending on the height of the ceilings in the house. Rooms of standard height (260 cm) are usually decorated with thick thermal insulation based on extruded polystyrene, polypropylene, cork, etc. If the ceiling height is less, it is recommended to use thinner materials, such as metallized lavsan or thin foil-clad canvas. It should be said that the effect of insulation in this case may be slightly less, which pushes some owners to additionally apply the so-called. Warm paint.

What is thermal insulation

Prices for insulating substrates under a water warm underneath are different. It depends on the manufacturer and on what kind of material is used as a base. Insulation of heating pipelines is presented in a significant variety, however, some varieties are more popular. To understand which insulation is better for a warm water floor, you should familiarize yourself with the characteristics of each of them.

Polypropylene mats

They are made of expanded polyethylene, for the production of which the extrusion method is used. The unique composition of the material allows not only to prevent heat loss, but also to protect the room from extraneous noise. Polypropylene boards have good strength.

Due to its elasticity, the material is very convenient for laying and handling. Thermal insulation mats made of polypropylene feel comfortable at temperatures from -30 to +130 degrees.

Cork backing

The main advantage of underfloor cork insulation is its absolute environmental safety. The cork thermal insulator is sold in rolls, which creates additional convenience when laying and distributing the required amount of cloth. This makes it possible to cover the entire area of ​​the room with a continuous layer, without butt glued sections (as you know, it is at such joints that most heat losses occur).

Due to the decent height of the cork backing (30-40 mm), it is not recommended to use it in rooms with low ceilings. Another stopping factor is the high cost of the material, which is not affordable for everyone. It should be borne in mind that we are talking about a one-component thermal insulation, not equipped with a reflective foil coating. In order to achieve full-fledged thermal insulation, it is necessary to additionally lay a metallized layer under the water circuits.

Mineral wool

Affordable and high-quality insulation for underfloor heating, which allows you to communicate sound and noise insulation characteristics to the floor covering. For the manufacture of this coarse-fiber cloth, rocks, slag and glass are used, which gives it special durability and strength.

Some modifications of mineral wool are also imparted with increased fire resistance and the ability to repel moisture.

Expanded polystyrene

Substrates made of this insulation are most often used in combination with "warm floor" systems, due to their good interaction with hot pipes.

Extruded polystyrene foam mats have many advantages:

• Increased material strength with low weight.
• Cheapness.
• Long service life.
• Comfortable transfer of aggressive influences.
• Moisture resistance.
• The material is not afraid of significant temperature fluctuations.
• Inertness to biological influences.
• Simple installation and maintenance.

Metallized lavsan insulation

It guarantees reliable protection for underfloor heating units from alkalis present in the concrete screed, which can seriously damage and deform the system. Thanks to the metallized film, the lavsan shell retains heat well in the house. Laying this insulation under a water-heated floor is very simple, because it is thin and well cut into pieces.

Foil backing

Thanks to the foil-clad insulation, a significant reduction in heat losses is achieved, which makes the operation of the internal heating circuits more efficient.

Foil insulation under a warm water floor, the cost of which may fluctuate depending on the thickness, has the following advantages:

• Compensates for defects and differences in the base.
• Improves the soundproofing of the room.
• Resists moisture.
• Increases the heating rate.
• Promotes an even distribution of thermal energy, thanks to the arrangement of heating elements at the same distance from each other. This helps to heat the coating in the intermediate areas.
• It transmits heat well further away from the tubes, protecting them from overheating.
• It can be used as local heat-reflecting screens (for example, behind heating radiators).

Which option is better

When installing a warm floor, it is recommended to carefully follow the sequence of work: this is the only way to ensure good efficiency of the system. If we neglect the insulating substrate, this will increase heat loss by about 30%. As a result, all the advantages of the water circuit will be lost, and heating costs will increase significantly. Therefore, it becomes clear the importance of preliminary warming of the base, and the categoricalness with which professional plumbers insist on its arrangement.

Scopes of insulation

Insulation for underfloor heating pipes in the construction industry is widely used. With its help, they decorate balconies, attics, loggias, corridors, etc. It should be understood that the warming sheets described above are intended exclusively for internal use: it is better not to glue them on the facades. According to building codes, when arranging floors in a house, it is imperative to apply thermal insulation.

If this prescription is disregarded, over time it leads to the appearance of condensation on areas of the floor and walls that are in direct contact with external ceilings. Moisture is sometimes formed in such an amount that it leads to rapid growth of mold and mildew. The consequences of such a "biological attack" can be very different - from an unpleasant smell and appearance, to a real threat to the health of people living in the house.

A specific feature of thermal insulation for a warm floor is its complete impermeability to infrared rays: they not only linger on the surface of the material, but are also reflected back into the room. As a result, this can significantly reduce the financial costs of heating.

"... Thermal insulation layer
The main purpose is to prevent heat losses down. The heat must go up into the heated room. It can be made of any materials permitted in construction as a heat-insulating layer for use in floor construction.

No matter what material the thermal insulation layer is made of, the following condition must be met:

The thermal resistance of the thermal insulation layer must be greater than the total thermal resistance of the heating layers (including the finishing coating) at the maximum thermal load on the water-heated floor.

The greater the heating load, the thicker the thermal insulation layer.

The higher the thermal resistance of the finish coating, the thicker the thermal insulation layer.
The most common thermal insulation material in modern construction is polystyrene. It is recommended to use polystyrene with a density of at least 35 kg / m3. Polystyrene of lower density is not resistant to mechanical stress, collapses if not used carefully and loses its mechanical and thermal insulation properties, especially when, against the background of ongoing general construction work, a long time passes from the end of the installation of pipes for the water floor heating circuits to filling them with a screed. Polystyrene with a density of 50 kg / m3, as well as extrusion, is used in systems with high mechanical loads (auto centers, warehouse complexes with heavy forklifts, road heating, etc.).

ATTENTION! Russian manufacturers (for the most part) produce polystyrene according to TU, and not according to GOST: the numbers in the product name (for example, PSBS-25, PSB-35) do not indicate the density of polystyrene. The actual density, as a rule, is "one step" lower than the figure appearing in the stamp. Be careful when choosing materials. ... "

On the ground from 8-10 cm of expanded polystyrene. Interfloor floors - 2-3 cm of expanded polystyrene.

You can safely FORGET everything else.

About foamed polyethylene 2 mm)]) with foil incl.

Foil saves only a few percent.

Foil, not protected by a film, collapses in concrete in 2 weeks.

Those. in the basement, you can use Extruded polystyrene foam URSA XPS, 50x600x1250mm, pl. 35kg / m3

And on floors with 3cm thick slabs?

Or is it worth it, just in case, in the basement to put on the thicker? and on the floors to start up 5cm 35kg / m3?

And give advice which screed is better to lay 3 or 5 cm? and on top to lay down tiles or laminate with what will be warmer? I just read a person's tile floor is very hot and the laminate floor is not even warm.

Please advise more pipes, otherwise the company offered me prices from 0.45 euros to 1.25 euros per 1 m. Pipes so which ones are better to buy so that they would be warm and durable?

Underfloor heating is expensive. Equipment, pipes, installation services - all this is money. The cost of insulation for a warm water floor is only about 3% of all costs, but it is with its help that heat losses can be reduced by up to 20%.

What types of thermal insulation materials are at their peak of popularity? What are their advantages and disadvantages? Let's try to figure it out.

Penofol is polyethylene foam covered with foil on one or both sides. The heat-reflecting effect is achieved due to, figuratively speaking, trapped air bubbles, as well as a layer of aluminum foil.

Penofol advantages:

• small thickness, only 2 - 10 mm;
• withstands temperature differences from -60 ° С to + 100 ° С;
• well insulates against noise, moisture and steam;
• low price - only about 0.1 USD for 1m².

However, it also has a drawback. Aluminum is destroyed if it comes into contact with cement, and this is the main component of the floor screed. Therefore, over time, it will cease to fulfill its main purpose - to reflect heat.

Demand dictates supply, so the buyer can be offered a sheet of laminated polyethylene foam with a foil surface. Lamination reliably protects aluminum from destruction.

Master Tips: if the choice still fell on penofol, cover it additionally with plastic wrap. The canvases must be overlapped and the joint must be glued with tape or masking tape. Then the foil will be protected from the aggressive effects of the cement-sand screed.

Expanded polystyrene

Expanded polystyrene is a more accurate name for polystyrene foam. These are compressed granules, which are 98% air. It has a low density and, therefore, lightness. What are the advantages of polystyrene foam as insulation for floors?

1. Ease of processing.
2. Resistant to water, mineral oils, acids and alkalis.
3. Does not rot, is not affected by bacteria.
4. High thermal insulation performance. Foam plastic with a thickness of 30 mm will retain the same amount of heat as a reinforced concrete slab thicker than 1 meter.

But foam also has disadvantages:

1. Permitted floor height. It is not always possible to raise the floors by 7 - 8 cm. In this case, penofol with its small thickness will be a good compromise option.
2. Insulation as part of a manufacturer-specific water floor system. Manufacturers of equipment and consumables can provide a guarantee of the efficient operation of their products only if insulation of the same brand is used.

Thus, prudence will induce to weigh and take into account not only the thermal effect during the work on the installation of floors, but also whether the characteristics of the insulation will remain in the future. And of course, you shouldn't discount how the finished floor will look in combination with the rest of the interior decoration.

How to insulate a warm water floor with your own hands, see the video:

The device of a water-heated floor requires competent design and strict adherence to technological standards. The choice of insulation is one of the important points. Let's consider the main types of thermal insulation materials, their properties and characteristics.

Insulation is an indispensable element of a warm floor. Without it, the system will not be economical, and most of the energy will be lost on heating the underlying floors of the floor or ground. This issue is especially acute when the system is built on the ground.

So, what kind of heat-insulating materials are advisable to use when installing water-heated floor systems? In general, any material that meets certain characteristics is acceptable. First of all, it must have a sufficient level of thermal insulation, also be resistant to moisture and chemicals from the concrete screed, and have sufficient rigidity.

To one degree or another, all these requirements are met by the following materials:

• expanded polystyrene (foam);
• extruded polystyrene foam;
• mineral wool slabs;
• foamed polyethylene (penofol);
• natural cork.

Let's consider each of them in more detail.

Expanded polystyrene (PPS) is popularly called polystyrene foam. This material is obtained from polystyrene by foaming. In addition to the polystyrene itself, the insulation contains a large number of additives and modifiers that improve its properties. Thanks to the foaming materials, up to 98% of the volume of PPS consists of air bubbles.

Consider the characteristics and properties of expanded polystyrene. The heat transfer coefficient, which is the main characteristic of thermal insulation materials, in expanded polystyrene varies from 0.030 to 0.047 W / m · ° C. It depends on the manufacturer and on the density of the material. PPP is available in different densities, on which the rigidity and weight of the material depends. At the same time, thermal conductivity depends little on density.

Expanded polystyrene is a combustible material. Also, when heated to a relatively low temperature (about 80 degrees), harmful substances can be released from it. Other characteristics of this material include:

• resistance to fungi and microorganisms, but the material can be destroyed by rodents;
• PPS poorly absorbs water (not hygroscopic), which is convenient for installation in a wet screed.

Expanded polystyrene is convenient for use and is often used in underfloor heating systems.

Extruded polystyrene foam (EPS) is a type of expanded polystyrene. It is produced in the same way as PPS, the only difference is in the method of obtaining granules. Its characteristics include low thermal conductivity 0.029 - 0.034 W / m · ° C, not high hygroscopicity.

Various types of EPS are produced, with density from 25 to 45 kg / m³. In terms of thermal performance and lightness, it surpasses expanded polystyrene up to the PSB-35 brand and is similar to the characteristics of high-density polystyrene foam.

This material is tougher, better resists mechanical stress than expanded polystyrene, therefore it is more convenient to use it and it is less destroyed. The main disadvantage is its higher price.

Please note: Both EPS and ordinary expanded polystyrene are produced in a special modification for warm floors, in which a system of special grooves and channels is made on the upper edge of the slab for laying the underfloor heating pipe. This makes the job easier.

Mineral wool slabs

Rigid mineral basalt wool slabs are sometimes used for underfloor heating systems. Its characteristics are similar to those of ordinary mineral wool. The difference is in rigidity and ease of installation. The main positive characteristics of mineral wool include:

• zero flammability - the material is not exposed to high temperatures;
• high noise insulation characteristics;
• good thermal insulation properties;
• chemical resistance.

Rigid mineral wool slabs with a density of 175 to 200 kg / m³, the thermal conductivity of which is about 0.039 W / m · ° C, are used for the screed device. The main negative property of mineral wool is hygroscopicity and vapor permeability. Because of this, when installed in a wet screed, they require careful hydro and vapor barrier.

Foamed polyethylene

Recently, foamed polyethylene has been used for thermal insulation of warm floors. It is a roll material with a thickness of 3 to 10 mm. Foamed polyethylene can also be foiled on one or both sides. Foiling creates a reflective layer for infrared rays. The use of foiling allows you to reduce the thickness of the required heat insulator.

However, there is a nuance: the reflection of infrared rays by such a layer is difficult in a solid, such as a cement screed. But still, the use of such material allows you to significantly save on the height of the screed. This will keep the room height from decreasing.

In terms of its thermotechnical characteristics, foamed polyethylene is similar to expanded polystyrene and other materials. The thermal conductivity coefficient of this material in a dry state is in the range of 0.037 - 0.049 W / m · ° C, while it should be borne in mind that foamed polyethylene absorbs water, while its thermal insulation properties decrease.

It is also important to know that foil can be corroded by chemical materials in the concrete mix. To eliminate this problem, many manufacturers produce sheet material that is covered with special polymer films on top of the foil.

Natural cork

Natural heat-insulating material - cork - is also used for water-heated floor systems. The heat transfer coefficient of cork is 0.034 and is similar to the best plastics. The main positive characteristic of cork is naturalness. It does not include foreign chemical additives and harmful substances.

The main disadvantage is the high cost. The use of natural cork in a cement screed underfloor heating is justified mainly by its naturalness. But the question arises: is it worth pouring expensive and natural material into cement.

Cork is a relatively hygroscopic material. It can absorb up to 12%. In order to protect the cork insulation from getting wet, it must be covered with a dense layer of polyethylene or polyvinyl chloride film with or without foil.

"Pie" underfloor heating

After analyzing the possible types of heaters for a water-heated floor, let's analyze the composition itself, the so-called pie. After all, the qualities of the system depend not only on the correct choice of insulation, but also on competent installation. In what order are all layers of a water-heated floor mounted?

The order also depends on what the system is mounted on. If the underfloor heating device goes on a ground base, then first of all it is advisable to arrange a rough concrete screed, on which the cake will continue to be laid.

• insulation of the required thickness, and when installed on the ground, the thickness of the insulation can reach 150 mm, and for ordinary floors, the thickness of the insulation is chosen up to 50 mm;
• if the insulating material is not covered with protection from above or there is no system for laying pipes on it, then it must be covered with a vapor barrier film to protect it from moisture from the cement mortar (except for foam and EPS);
• further, a special panel for laying pipes or a reinforced frame is installed to create rigidity;
• a pipeline is attached to the frame or panel.

The whole system is ready for screed and decorative flooring.

Floor heating scheme.

When choosing a heat-insulating material for a water-heated floor, you need to focus on financial capabilities and affordability. Extruded EPS or conventional EPS boards will be suitable for most applications. If it is not possible to arrange a thick screed, foam polyethylene is used. Mineral wool slabs are more often used when installing a system in a wooden floor. But it can also be used in a cement screed. Cork is for connoisseurs of natural materials.

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