To date, the polyurethane foam is used for various purposes, for example, in the manufacture of upholstered furniture, as a heat insulator in the refrigerator, in the production of car seat and bed mattresses. Also, polyurethane foam is often used as thermal insulation of various techniques. Significantly less often this material is used for the insulation of walls, ceilings, gender and roofs. Is it worth using it in this case, decides the owner of the house.

Polyurethan is a kind of polymer gas-filled materials. The structure of this material is represented by a cellular plastic, which is approximately 90% filled with inert gas. Due to its porous structure, the material has several unique properties, which allowed him to be distributed in various fields of industry.

Polyurethane foam is obtained by mixing polyol and isocionate. In total, there are two technologies for which this material is used as the insulation of the premises - these technologies are fill and spraying.

When the walls are insulated with polyurethane foam spraying, a fine aerosol is used, which is obtained by mixing isocionate and polyol air. Spraying is applied to the surface with a spray gun, like ordinary paint.

As for the fill technology, it is performed by filling the void with a homogeneous liquid obtained by mixing ingredients without air access. At the same time, from the entire volume of the product of polyurethane foam in it there is only about 3%, and the rest is gas.

Polyurene foam has the lowest indicators of sound system and heat resistance. Therefore, in construction business, it is used as a heating material. The greatest popularity today received liquid polyurethane foam.

If you think it is necessary or not to warm the walls of the house by polyurethane, then you need to get acquainted with its positive and negative qualities. In addition, it is important to know its technical characteristics and technology of application, both for external and internal work.

Benefits of insulation polyurethane foam

• If you compare this material with other heat insulating materials, it has the lowest thermal conductivity. So, the polyurethane foam coating with a thickness of 1 centimeter has almost the same heat resistance as the minvay insulation thickness of 5 centimeters, brick masonry 30 centimeters thick or a filling concrete 63 centimeter thick.
• It is also necessary to note almost similar comparisons on the acoustic protection of this material. Thanks to him, it is possible to isolate housing from the external noise of the street, the sound of a falling hail or droplets of the rain.
• This material is considered harmless and biologically clean. At normal temperatures, it does not distinguish any harmful ingredients. It is also not subject to chemicals. The insulation of the walls of the house will be harmless, because the level of distinguishing harmful ingredients in polyurethane foam does not represent danger to humans. It is no more than any other plastics that surrounds a person today everywhere.
• Polyurethane foam is considered to be a difficult-scale material. It includes a polyal component A and isocynotic component B. The first includes substances such as polyols, catalysts, foaming and stabilizers. As part of the second - polyisocyndage. When these two components are mixed on the site, foaming occurs, and in the future - the screwdriver. Since 2003, the additive of flame retardants, which make the coating of the material with non-combustible and self-fighting is included. Ignition is possible only in the presence of open fire, the temperature of at least 500 degrees Celsius.
• From the advantages it should be noted that the outer insulation of this material is not subject to negative impacts. It is especially worth noting that due to its structure the material has the lowest hygroscopicity among all other types of insulation. As a result, the surface absorbs only 1-2% of moisture, which falls on it.
• Liquid insulation can be applied by spraying on the surface of almost any configuration. At the same time, it will fill out all the irregularities and flaws.
• It is also important that the material is quickly applied to the working surface. As a result, it turns out a smooth seamless coating that does not miss the cold.
• When using polyurethane foam does not need to be waterproofing the surface that should be insulated. The material has very good adhesion, and the service life can reach up to 60 years.
• Polyurethane foam is capable of withstanding temperature differences from -150 to +140 ° C.
• Due to its low weight, it can be used even in the buildings of the old building. At the same time, it is not damaged by rodents and the development of microorganisms.

Disadvantages of insulation polyurethane foam

• The main minus insulation of the walls of polyurethane foam is the price. It is for this reason that it is rarely used for apartments, as well as wooden and brick houses. In order to prevent cash spending on the purchase of instruments, you can rent them. Also need personal protective equipment. This, of course, will reduce the cost of work, but the time will increase the time you spend on their conduct. At the same time, no one can ensure that everything will be done qualitatively.
• As for the environmental friendliness of this material, it is confirmed by the relevant certificates. But this certificate applies only to the use of it in some areas of production, for example, the production of furniture and refrigerators. Perhaps it is for this reason that the polyurethane foam is rarely used in the construction of housing. Usually limited to outdoor operations in small areas.
• The disadvantage of this material is also the fact that in the case of fire, it is very smallest, even if we put out the fire. In this case, this smoke contains a lot of toxic substances.
• It should also be noted that the polyurethane foam is rapidly destroyed under the influence of ultraviolet, decaying the monomers who may have greatly harm human health in a short time.
• In addition, there is a limit on the exterior wall decoration. If fixing sheet materials on the insulation with self-tapping screws or dowels, then it deprives such a quality as monolith. In this case, a ventilated facade should be made and placed. But the mixture for plaster should ensure reliable protection of polyurethane foam insulation from air, ultraviolet and moisture.

Do not forget that the quality of the insulation depends largely not only on the material, but also from the skill of the artist. Frame houses, as well as houses from brick and wood, insulate the polyurethane foam only to specialists who have a good reputation.

This type of thermal insulation has contradictory reviews. Warming of walls polyurethane foam, nevertheless, is in demand.

Several recommendations

If you decide to warm a frame, wooden or brick house with the help of polyurethane foam, then some simple recommendations should be followed.

• So, walls and floors using spraying technology should be done only from the outside. In addition, it is necessary that the heat-insulator receives the maximum protection against ultraviolet, moisture and air. At the same time, during the entire period of operation, it is necessary to control the reliability of the insulation.
• When a specialist is selected, which will be equipped with insulation, not only advertising should be taken into account. Special attention should be paid to the finished objects made by this Contractor. It is best if these objects will have a sufficiently large service life.
• When insulation of polyurethane foam walls of a frame house, voids are usually filling, which formed during operation due to the wear of the insulation. In this case, it is necessary to ensure that the material of the walls of the room did not let the air, i.e. The inner walls of the room must be completely sealed.
• When insulating polyurethane foam walls from the outside of a brick and wooden house, the filling of the frame structure can be carried out with the help of mineral wool, foam and other material. The most important thing is to take into account the characteristics of the building itself, climatic conditions and operational features.
• Is it worth choosing a polyurethane foam as a heater, each decides for himself, but it is impossible to forget that in most cases this material is used in the factory conditions when all production technologies are observed to ensure compliance with hygienic certificates.

Thermal insulation polyurethane foam

It is possible to insulate the house of polyurethane foam, both from the inside and outside. Moreover, you can warm up both during the repair and the construction of the building. This material can be used for insulation, both the entire surface and only individual items. In any case, the owner of the house must take into account the moisture of indoors, the thickness of the walls and beams, as well as the factors that are associated with the local climate. Premises that are usually insulated by this material from the inside are city apartments in high-rise buildings. At the same time, the insulation of the walls of the walls of polyurethane foam is made only the walls of the rooms, which are most susceptible to cold and noise from the street. For example, these are rooms with access to loggia, angular rooms, rooms with walls facing the road or common walls that share two apartments. Sometimes this material is insulating the kitchen or bathroom.

Wall insulation Outside

Best of all the foam of loggia, attic and balconies are insulated. Wall insulation outside polyurethane foam effectively for thermal insulation of single-storey houses, as well as administration and industrial buildings.

In case of insulation of the walls, this material usually needs to go through several stages, the first of which is the preparation of walls. Then impose polyurethane foam spraying. After that, reinforcement is made with special screeds. Further final finishing works are carried out.

The preparatory work includes cleaning walls from the old coating. It is necessary so that the insulation is better for the work surface. After that, a polyurethane foam layer is sprayed on the purified surface, the thickness of which can be changed if there is a need.

Then it is necessary to apply a reinforcing coating on the walls (fiberglass mesh with holes). In order to lay well on top well, the layer of such protection should be a thickness of at least 60 millimeters.

When work should need to remember that no matter how reliable there is no coating, it can be useless if high-quality doors and windows are installed. To cover hard-to-reach places, such as places near openings, liquid polyurethane foam should be used.