Extruded polystyrene foam underlay. Extruded polystyrene foam underlay Aberhof sheet underlay 3 mm

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In my work, when laying laminate, I come across various types of materials. As insulation, a sheet substrate made of extruded polystyrene foam is regularly found, which will be discussed in this article.

Polystyrene was invented and patented in France in 1930. Extruded polystyrene foam was first created in the USA in 1941, the product belongs to the petrochemical industry.

Polystyrene is formed by the polymerization of styrene. A viscous mass is passed through the reactor-mixers with benzene with a gradual increase in temperature in stages. Unreacted styrene is removed by vacuum. At the output we get a pure product, stably inert. That is, in a normal, non-aggressive environment, it is safe.

The density of polystyrene is just over 1000 kg/m3. Get it in the form of granules of a cylindrical shape. Polystyrene is used for further processing: plastic disposable tableware with the sign (PS), sandwich panels, decorative baguette, substrate and much more.

Expanded polystyrene - a brief description and composition

Expanded polystyrene is produced by the gasification method. A multiple increase in volume occurs due to the filling of granules with carbon dioxide or natural. The combustibility of expanded polystyrene depends on this.

We obtain material of different density from 40-150 kg/m3. The strength of the composition and vapor and air permeability depend on the specific gravity. I draw your attention to the fact that this is not yet a finished substrate. In further processing, the density of the material will be reduced.

Extruded polystyrene foam - characteristics, composition

Actually, we got to the material from which the insulation is made. Extrusion molding machine under high pressure and high temperatures through a narrow nozzle using a blowing agent delivers polystyrene. There is a gasification of the mass. At the output we get, depending on the type of machine, the finished product. In our case, this is a substrate for a foamed polystyrene laminate.

The density of extruded polystyrene foam is low - about 30-40 kg / m3. With a given specific gravity, the material has a relative hardness, brittleness, high thermal insulation.

Polystyrene sheet for flooring

The substrate can be supplied in the form of rolls and, more compactly, in sheets.

Extruded polystyrene foam (XPS) laminate underlay comes in two types:

• sheet
• rolled

The sheet substrate, in turn, can be divided into a variety:

• individual plates
• harmonic

Between them, the main difference is only in the method of installation. The name of the substrate - accordion speaks for itself.

It is necessary to lay carefully, the connection of the plates is gentle. In the event of a rupture along the seam, the panels must be fastened with adhesive tape. The requirement to fasten the material is due to the lightness of the bedding and its mobility from air gusts. The accordion substrate in terms of installation speed surpasses the usual sheet counterpart.

The material is supplied in cellophane packages. The size of the plates in width is 500-600 mm, and in length 1000-1200 mm. The color of the lining directly depends on the dye: blue, pink, green, gray - for every taste.

The thickness of the substrate is varied: 2, 3, 5 mm.

Sheet substrate for laminate "Solid" 2 mm

For example, a sheet substrate for a laminate under a warm floor will be taken. About the best insulation for underfloor heating.

The substrate sheet "Solid" has a thickness of 2 mm and a density of about 40 kg/m3. The sheets are perforated to distribute the flows of incoming warm air from the heated floor.

One well-known large retailer, Leroy-Merlin, has different data on the leveling ability of the lining. The description says one thing, the specifications say another. It should be noted that any 2 mm thick insulation has little ability to remove the unevenness of the base. So think about what to believe - you can break your head from research.

The second contradiction from one trading company is the impossibility of using most brands of laminate under water-heated systems. The annotation of the "Solid" substrate indicates that it is suitable for warm water floors.

It may be that laminate flooring manufacturers need to pass the appropriate certification, which costs money and they are not in a hurry to invest it. Or maybe they are afraid of the release of condensate vapors that can spoil the flooring. In any case, it is advantageous for the manufacturer to be less able to provide a warranty, which they do.

Installation of laminate flooring without the use of 200 micron or 0.2 mm film is not covered by the floor warranty..

The electric floor is hidden under a cement screed. Therefore, its use will not harm either the laminate or the insulation, as long as the recommended temperature is observed, which is 28 degrees Celsius for most laminate floors.

However, Styrofoam is a poor conductor of heat and I'm not sure if perforation in a positive direction will significantly affect the energy savings in your home. Moreover, to maintain the guarantee, there is a need to lay a vapor barrier film.

In this case, under the laminate it is possible to use any substrate, without the use of ventilation holes.

Infrared warm floors, currently the most popular, are laid directly on the substrate. Then, the holes, on the contrary, theoretically will serve as the release of thermal energy into the floor screed. Yes, and the thickness of this “Solid” lining, which is 2 mm, is too thin and the clamps will need to be recessed into the concrete base.

The price of the "Solid" sheet substrate with perforation for underfloor heating is from 60 rubles / m2. Sold in packs of 8.4 m2.

Summary of the substrate "Solid" 2mm with perforation for underfloor heating

It is worth paying attention to the substrate when using warm electric or water floors. However, the low leveling ability and the need to use a vapor barrier film make it difficult to comply with warranty service.

Sheet substrate for laminate "Solid" 3 mm

With a sheet substrate 3 mm thick, it is more comfortable to work. The main point is the greater leveling ability. If the base is uneven under the weight of the laminate and furniture, it is pressed through with time on bumps. In this way, alignment occurs. Shrinkage is facilitated by the ribbing of the surface, which is regularly found on the reverse side of various types of substrates with a thickness of 3 mm.

For example, let's take a Solid 3 mm substrate in the well-known Petrovich store. Packing area of ​​10.5 m2. The length is 10 meters, the width is 1050 mm. Unfolds like an accordion.

The particular thing that interests me about extruded insulation is the density of the material. The characteristics indicate that the density is 45 kg / m3. This is the average.

In one runet summary table, the minimum value for extruded polystyrene is 33 kg / m3, in our case 45 kg / m3, in well-known specialized markets they sell a substrate without specifying the manufacturer with a density of 55 kg / m3, which suggests some thoughts about the likely substitution of characteristics. Since hardly anyone bothers to measure the density of the substrate, and it is quite difficult to do this. The weight of the package is not indicated everywhere, and the presence of ribbing reduces the possibility of measurement to zero.

The accordion substrate does not have ribbing, therefore, using the indicated characteristics, in the Petrovich store, beloved by many builders, we can easily recalculate the density of the material.

Compound: extruded polystyrene foam (XPS).

Dimensions: thickness 3 mm, width 1.05 m, length 10 m.

Density: 45 kg/m³

Color: Orange.

Manufacturer: Russia.

Gross weight: 1.39 kg.

10*1.05=10.5 m2 - area of ​​the substrate

10.5 * 0.003 (3mm thickness converted to meters) \u003d 0.0315 m3 - volume received

45 * 0.0315 \u003d 1.4175 kg - the package must weigh net

1.39 / 0.0315 = 44.12 - the actual density of the lining

As you can see, the difference is just over two percent. This difference is of no importance.

However, EPS insulation vendors argue in favor of this underlay, compared to . Higher material density and longer service life is a good reason.

The foamed substrate, according to various sources, has a density of 20-50 kg/m3. Which in the maximum values ​​is comparable to extrusion. If we focus on the density of comparable materials, then they are almost the same, extruded polystyrene has a slight advantage.

Summary of the substrate "Solid" - accordion 3 mm

The underlay is quite fast in laying compared to conventional sheet insulation, but inferior to foam roll material. I consider this moment important for those who want to lay the laminate on their own for the first time. It is always difficult to do something for the first time and devote too much time to any simple aspect. Roughly speaking, you can lose your patience in flooring without starting to do anything.

The price of "Solid" 3 mm is about 55 rubles per m2. Which is much more expensive than foam underlay, but inferior to more expensive ones: Tuplex, Profitex, cork... For calculation, it should be borne in mind that the sheet substrate for masters is usually not included in the cost of laying flooring, so the total price rises to 75 rubles per square meter, which is comparable to expensive insulation.

Sheet substrate for laminate "Aberhof" (Aberhof) 5 mm

For example, I present a sheet substrate for Aberhof 5 mm laminate. It is already difficult to write anything at all about the material about which almost everything has been said above.

The substrate is made of expanded polystyrene by extrusion. The official website contains modest information about the characteristics. The package consists of 10 sheets with an area of ​​5.25 m2, 1050 mm by 500 mm in size and 5 mm thick.

The 5 mm underlay has higher soundproofing and heat-insulating properties compared to the 3 mm underlay, by an average of 20%.

The density of the plate is 35 kg/m3.

The 5mm liner has high leveling performance up to 3.5mm.

For extruded polystyrene foam, the specific gravity of the Aberhof lining is quite low. Depressing is the lack of information on the site about passing fire certification, compliance with sanitary and hygienic requirements, and a PCT certificate of conformity.

Summary of Aberhof 5 mm substrate

Please note that laminate manufacturers do not provide a guarantee for floor coverings with a used substrate of more than 3 mm thickness.

I see the use of Aberhof 5 mm sheet with a limited budget for leveling the floor level between rooms. Keep in mind that the lining will shrink over time.

The material under test is indispensable when laying laminate or parquet boards in rooms with an uneven base. When there is no time and opportunity to equalize.

Rolled substrate from extruded polystyrene "Solid"

This product is supplied in rolls with an area of ​​16.5 m2. The length of the canvas is 15 meters, the width is 1.1 meters, the thickness is 2 mm.

A density of 50 kg/m3 is considered high.

Combustibility class of the material G4 - highly combustible.

The numbers are not documented on the website. No certificates found.

Summary of the roll substrate "Solid" 2 mm

It is extremely difficult to work with a roll substrate. Easily breaks, rolls back into a roll. You have to press it to the concrete base with improvised means.

Really use 15 square meters. Closer to the base, the lining, when viewed in profile, takes on a spherical shape. To be able to lay it is necessary to cut into pieces. It all looks extremely unprofessional.

The price of a rolled substrate made of extruded polystyrene 2 mm is about 35-40 rubles / m2.

I express my deep conviction. It is better not to buy this insulation.

Pros and cons of extruded polystyrene foam backing sheet

We consider sheet insulation for comparison, since it is more widespread than roll insulation.

Advantages of sheet extruded substrate

• Higher density and probable life of the material compared to foam bedding.
• Relatively low price from 35 rubles / m2.
• Insulation is not subject to rotting and mold formation.
• Compact storage.

Cons of sheet extruded substrate

• High flammability of the material.
• More considerable time of a flooring in comparison with roll "Pleneks".
• The curved shape of the sheets is regularly encountered.
• Fragility of the material.
• The lining is "not indifferent" to a poorly prepared base. Small stones tear the "body" of extrusion.
• To comply with the warranty, the requirement of laminate manufacturers to lay a vapor barrier foam.

23 ratings, average: 3,35 out of 5, total ratings: 23)

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