Polyfoam is an insulation material that has a foamed structure. Due to its qualities and low price, it is widely used. Polyfoam, a photo of which can be found on various Internet resources and manufacturers' websites, has both significant advantages over other heaters, and disadvantages.
For the production of polystyrene material, polystyrene is used, which is famous for its resistance to subzero temperatures, and also perfectly resists high humidity. If exposed to high temperatures, then it can take on a variety of forms.
For the manufacture of foam, polystyrene is foamed in a special way, the granules are treated with steam. Thus, manufacturers seek to reduce the density of polystyrene and reduce weight.
After the secondary foaming, the material is sent for drying. This is done in the open air, due to which the granules are filled with oxygen and acquire the final structure. The material is then shaped to form the white slabs that we are familiar with.
After all the manipulations, the finished foam is cut.
A very important point in the production of foam is to maintain the temperature in the room at + 18 ° C. If you do not follow this nuance, the material will crumble. Often, the finished foam is cut into blocks of 100 x 500 mm. In addition, product sizes of 2000 x 1000 mm are often found.
Note. Polyfoam is very popular as a heater due to its low cost and ease of installation.
Non-pressed foam has a loose structure and is quite brittle. In the pressed case, the granules are held together by pressing, which in turn makes the material much stronger.
The extrusive type of foam is made at high temperatures, as a result of which the granules are connected tightly and firmly, forming a single substance.
The most popular and frequently used types of foam are the following.
It is used for insulation of facades with foam plastic in private houses, balconies and floors. Possesses a high degree of resistance to moisture.
It has an unspoken name - aviation foam.
There is another type of foam - granular . This material is used as a filler when insulating facades with foam. The granules are covered between the wall and finishing materials.
Penoizol - insulation in liquid form. It is used in the same way as granular foam.
The division of foam into types is also taking into account the shape. Leafy types are more commonly used because they are versatile. They can be used to insulate ceilings, floors and walls.
Sizes and thicknesses may also vary.
The material is a kind of barrier to the penetration of sound waves through it. In order to provide protection against the propagation of annoying sounds, it is enough to apply foam with a thickness of 3 cm.
In addition, correct installation also guarantees the strength of the foam finish at home.
But, mice and rats can make holes in the material with ease.
For the manufacture of foam, substances containing toxins are not used, therefore, the foam does not emit vapors hazardous to human health.
The material is suitable for insulating houses with foam plastic, building foundations, walls, floors. If there is a need to choose foam for a specific purpose, you will not have any difficulties in choosing. Hardware stores are able to offer a wide range of Styrofoam products.
In addition, frame buildings can be sheathed with foam.
Any material, despite all its positive characteristics, may have a number of disadvantages. Polyfoam is no exception.
Destroyed by ultraviolet radiation . This fact does not pose any particular trouble, because the foam is hidden under the finishing materials.
Styrofoam emits toxic smoke when burning.
In this regard, many manufacturers add special substances to prevent the spread of fire.
Styrofoam is absolutely steam-tight. This drawback occurs when the material is incorrectly installed. The use of foam for wall insulation often results in a greenhouse effect indoors due to the walls not breathing.
When choosing insulation for finishing the facade of a house with foam plastic, take into account the factors that affect the life of the material.
The first step is to determine the features of the surface on which the foam will be mounted. For walls that are lined with plasterboard and clapboard, take foam with a density of 15 kg / m³. to insulate the facade of the house, choose a material with a density of 25 kg / m³. foam plastic with a density of 35 kg / m³ is used if it is necessary to make good insulation from extraneous disturbing noise.
If the material has not been stored under cover, do not take it, as the sun's rays have a detrimental effect on its properties.
Complete or partial color change indicates poor quality material. There is black foam on sale, which means that the material contains graphite. Manufacturers claim that this allows for increased heat retention properties.
When buying foam plastic, inspect it from all sides, there should be no traces of crumbling.
A good quality foam board will bounce under pressure while maintaining tightness.Also, the granules should fit tightly to each other, there should be no gaps between them that exceed their size.
If you notice that balls are falling off when transporting or moving the foam, then you bought a poor quality material. Armed with all the knowledge and advice on choosing foam, you can be sure that the material will serve you for a long time.
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