Types, PE substrate device + Photo and Video

Types, PE substrate device + Photo and Video Currently, the most common material for flooring is laminate. This material is very strong and durable, and also has an aesthetic appearance. Modern floor coverings require a backing, that is, a material that protects the floor from moisture and deformation due to an uneven surface. There are many types of underlays, but the most affordable and excellent option is a foamed polyethylene laminate underlay.

To achieve a beautiful and high-quality finish, the subfloor must be leveled as much as possible before laying the laminate.

The method of laying the laminate involves obtaining a monolithic board not connected to the base. If the laminate is not properly laid, then a loud knocking will be heard when passing over such a surface.

Accordingly, this will affect the service life. After a while, backlash will appear in the seams and sounds will be emitted when walking on it. It is in order to avoid all these problems that a backing is placed under the covering of the laminate.

Types of substrates

Basically, the substrate is represented by a porous material that is afraid of moisture, except for bitumen mastic and duplex. If the flooring is plywood, no additional insulation is needed. But if the basis is a cement screed, then moisture can penetrate from the temperature difference. In such cases, a pvc film must be placed in front of the substrate.

First, let's get to know what kind of substrates exist in general:

  • Types, PE substrate device + Photo and Video Foamed polyethylene;
  • Polystyrene;
  • Cork;
  • Rubber cork;
  • Bituminous cork;
  • Duplex;
  • Bituminous ;

Polystyrene have similar properties with polyethylene.

It is used to achieve improved thermal insulation performance.

Cork are obtained in the process of pressing crumbs of cork trees. It is an environmentally friendly material. It has high heat and sound insulation performance.

Rubber are made by mixing rubber with granulated cork chips.

The noise insulation characteristics of this material are much higher than cork counterparts.
Bitumen-cork The substrate is a high-strength wrapping paper impregnated with bitumen and sprinkled with cork chips. This material does not need additional waterproofing measures, since the substrate is laid with the cork layer down, which contributes to the formation of micro-ventilation.

Duplex is represented by a multilayer material consisting of two layers of pvc film with an interlayer of granular polystyrene, sometimes not less than three millimeters thick. The country of origin is France.

Substrates based on bitumen in our country appeared relatively recently and are gaining popularity in the construction industry. Possesses excellent noise, heat and moisture insulating properties.

Foam backing pe is the most inexpensive type used as an intermediate layer between the base of the floor and the topcoat.

The structure of PE substrates

The main role of the substrate is to stabilize and smoothly move the tangential pressure from the weight of people passing through the laminate or furniture standing on it to the base. Therefore, the backing must be soft and flexible.

With the help of the foam backing, the optimal degree of fixing of the laminate is achieved, namely, its following characteristics:

  • It is based on polyethylene treated with a hydrocarbon gas, which causes the appearance of many microscopic bubbles;
  • The material is produced by rolling devices. It is a thin canvas from two to three meters thick. This thickness is quite enough to form a reliable fixation of the laminate with the base;
  • The polymer base can be used in the manufacture of stitched and non-stitched grades. Crosslinked differs from non-crosslinked by the presence of auxiliary molecular bonds. The sewn PE is produced by special pressure treatment.

For your information: Uncrosslinked polyethylene substrates are used, as a rule, for rooms with the lowest loads, i.e. not intended for large movements of people and the presence of heavy furniture.

Foamed polyethylene of XLPE, PE-X grades is characterized by good stiffness and strength, and is also not inferior to more expensive analogs in operation. Due to competitiveness, many high-end flooring manufacturers argue that low-cost polyethylene substrates are short-lived.

However, they forget about uncrosslinked polymers.

For example, grades such as PE, XLPE work very well with laminate classes 32 and 33, intended for residential private premises.

Types of substrates

There are the following types of polyethylene substrates:

  • Simple. They consist of 1 layer of polyethylene and do not have a coating;
  • Laminated, having a metallized film coating, which gives them strength;
  • Foiled. They can be single coated or double sided.

    They also provide good thermal insulation due to the reflective ability of the foil.


Regardless of varieties, thermoplastic polymers are the basis for creating polyethylene substrates. Therefore, they have the characteristics characteristic of such substances:

  • Resistance to most alkalis and acids;
  • Not biodegradable, i.e.does not burn and does not contribute to the formation of fungus, even being in high humidity;
  • Has increased thermal insulation;
  • Air and moisture resistance;
  • Good noise insulation properties;
  • Depreciation.

    Helps to hide the unevenness of the base, does not allow the tiles to bend, which prevents squeak when moving on them;

  • Durability.


How long the laminate floor will last you depends on the correctness of the preparatory work and the choice of the substrate. It is impossible to fix all defects of the base with expensive substrates.

Polyethylene substrates have the following indisputable advantages, including over expensive analogs:

  • Polyethylene is a polymer that is resistant to most detergents and disinfectants, solvents, paints, varnishes, rodents and insects;
  • Such a substrate has good waterproofing properties. Laminate, laid on a concrete base, will not be exposed to moisture;
  • Polyethylene does not emit binders vapors, which is possible when using polystyrene or composite materials, despite the declared harmlessness certification.

The disadvantages include the property of fluidity of the PE, which affects its pulling under constant static load. It is placed thinner and if the base under the laminate has large irregularities and pits, then thorough leveling of the surface will be required before laying it. If this is not taken into account, then under the action of the load, the substrate will begin to stretch and sag.

Also, the material has a low melting point and is susceptible to ultraviolet radiation. It cannot be stored in rolls for a long time in a sunny place, since the material will become cloudy, acquire a yellowish color and lose its elasticity.

In addition, the foam backing is capable of a static build-up, which contributes to the deposition of dust on the laminate flooring. To prevent this phenomenon and to enhance the thermal insulation properties, the substrate can be covered with aluminum foil.

When choosing the necessary polyethylene backing, one must take into account the type and quality of the floor covering. If you choose a material that is too thin, it may not give the desired result, and a large thickness will contribute to excessive springiness when moving over it.

For example, a thin lining material of about two millimeters is suitable for a 7 mm laminate, and for nine millimeters it is better to choose a substrate of more than three.

Work on laying the foam sheet will not be difficult, the main thing is to observe several main rules:

  • Before laying the underlay, maximum leveling and drying of the subfloor is necessary;
  • When leveling with cement-concrete screed, first check for moisture percentage.This is done as follows: a glued piece of polyethylene is left overnight and checked for condensation;
  • The foil substrate should be laid with the foil upwards and must be insulated from the nearby electrical wiring.