How to insulate a house with foam insulation
There are many materials for insulation of houses, such as foam polystyrene, polystyrene foam, mineral wool, etc., but many are wondering if it is possible to insulate the house with foam, what its properties are and how it is environmentally friendly.
How to insulate a house with foam insulation
In order to understand whether it is possible to insulate the house with foam insulator, ProfiDom.com.ua considers its technical features and basic properties. Foam insulator, of course, has a number of own merits and peculiarities of application, as well as – shortcomings that need to be known.
What is foam isol
Foam insulates have several names. Scientific – carbamide-formaldehyde foam (KFP). In addition, this heater is called liquid or foam foam for its consistency during use
Technical characteristics of foam isol
density from 5 to 35 kg / m3;
coefficient of thermal conductivity 0,028-0,047 W / m * K;
the flammability group G2, that is, the material is moderately rotary. After pouring foam isol is already considered as part of the entire structure of the building, itself does not support combustion, slowly charred under the influence of flames;
shrinkage does not exceed 5%, usually 3%;
vapor permeability is 0.21-0.24 g / m * h * Pa;
operating temperature range -50 to + 90 ° C;
water absorption for 24 hours 6-8%;
Not afraid of insects and rodents.
In a liquid state, foam isol most closely resembles a white air soufflé or shaving foam, completely freezes after a few days, after which it has a fine-cell structure.
If we compare the thermal insulation properties of foam isol with other materials, it can be said that its 10 cm thick layer is capable of replacing a 2.5 m thick brick wall, a 2.97 m thick concrete, a 30 cm thick foam and a 20 cm thick mineral wool.
The most important issue that causes foam isol is its safety. In the scientific name of the heater, formaldehyde is present and this makes many homeowners worried. Disputes on this issue among scientists are still ongoing. Most specialists are convinced that with the correct technology of production foam isol is safe for the environment and human beings.
Tip! Buying foam insulating, ordering a service to warm the house on this technology, be sure to ask for quality certificates and verify the integrity of the manufacturer, his reputation on the market. In this case, you can be sure of the safety of the material.
Three main advantages of foam insulating before the other insulators:
Fast stacking. Insulation of a house of about 100 m2 takes one day;
Low cost. Foam isol is a very economical insulator, its price is several times lower than that of mineral wool or expanded polystyrene;
Possibility to insulate the house of an old building, without destroying the masonry and external walls.
Is it possible to insulate the house with foam insulation
How to insulate houses with foam insulation
Let’s talk about insulation of old houses by foam insulation in more detail. The technology looks like this: in the outer wall of the house drilled holes in a staggered manner, for example, a punch in the masonry joints. The distance between the holes is up to 2 m. A hose is inserted into the hole through which the liquid foam is poured into the void between the outer and the inner wall. Filling is carried out until the material starts to project out of the hole, which then stains. There are no traces on the facade as a result.
The convenience of the technology is that the foam insulation can fill the void left after another insulator, for example, glass wool, actively used in the past, has become inoperative. It is possible to pour an insulator under a siding, another finish of a facade, without destroying it.
In addition, foam isol can be used to warm the attic rooms, floors, directly on the construction site of a new home to fill voids in blocks or between the brick masonry, to fill the seams of the partitions, to keep the temperature in the refrigerating chambers. Foam isol is used in frame construction.
To check the quality of foam isola offered to you simply: ask the manufacturer to blow out a small amount of material as a sample. The composition should be white, homogeneous, do not settle down, do not decrease in volume. After 15 minutes, the initial frosting of foam isola should begin, after which it can be palpated by the palm – it should not break apart. After a complete frosting of the sample, try to break it – in no case should it turn into a rubbish, in the case of high-quality material you will have to put an end to it, and a small sinking is possible only on the edge. When light compression, frozen foam isol should be restored to form.
As for the durability of this heater, manufacturers declare – he will serve up to 50 years. The guarantee is usually given for 25 years.
However, ProfiDom.com.ua found out that there were already reports of a volume that, after 5 years, foam isol began to crumble in the rubbish.