In all textbooks for construction, in all videos on YouTube it is said that it is desirable to insulate the house with such materials that are not burning, or at worst it does not support burning.
Therefore, the first conservation of the builder — the less in the house of combustible materials, the better.
With this rule, almost all home owners agree, the problem is only in one: what is better?
For the owner?
For construction team?
In fact, only one person will be a non-combustible insulation in the warning of the house — the seller of the house. Because when selling a cottage you can hang on the ears in an inexperienced buyer any information noodle:
-This is clean
-Hellifier does not burn (this is not a foam!),
the house can not worry, built as for myself ….
And the buyer is satisfied and happy — bought a good house that does not burn, just life, so also the children will remain.
And yet, the huge number of people at home are insulated with foam, extrusion sprayed polyurethane foam. Was it all allowed a big mistake? And if a fire suddenly happens, their home is doomed?
I will not walk around and about. I have 2 good acquaintances. Three years ago, he was lucky to buy good land in a beautiful place, on the edge of the forest, bordering the reserve, next to the mountain river — Inzer.
Not a place, but just paradise!
And they began to build.
Practically synchronously flooded the foundations, fences were put on, ordered from the local Bashkir log houses and baths, covered their roofs. Not at home turned out — candy. All the relatives, children, acquaintances, familiar acquaintances, and even familiar acquaintances — everyone wanted to relax in Igor and Oleg.
Understanding that the living space in the reserve was catastrophically lacking, friends decided to insulate the roofs and make them inhabited, that is, to build Masnor … Marsan … Oh yeah, this as his attic.
Oleg did not think for a long time and stuck between the rafted ordinary, the cheapest foam of a thickness of 10 cm, stained his foam with a drawer and embroidered all the simulation of the bar.
As they say cheap and angry!
Igor decided to tear off and spent the whole construction season to insulate the house stone cotton. Long disassembled which cake is needed, which films to use how to organize the ventzor. Long tormented, but still did.
How many copies they broke when they discussed the better to warm what kind of house is warmer, more comfortable and ecological. Six months did not even talk to each other.
Point in the dispute put firefighters.
The first burned house Oleg. Because of the incorrect organization of the chimney (there is no gas in the forest, it was treated with firewood) closed overlap, and immediately the entire log house flashed like a match.
Black smoke from the burning foam was visible for 7 kilometers. It was not bad — who came running to stew even with the vendors could not close. Stood and photographed. And what else to do? After 40 minutes, firefighters came and poured stewing heads with water and foam.
Igor’s house caught fire at an unspecified reason. The firefighters did not really say anything, suspicion of faulty wiring. But this is not the essence. Halfed no less sound. There was practically no black smoke, on the contrary, tasty pulled the smoke of heated to an incredible temperature of the tree.
50 minutes after the challenge, firefighters arrived. Only to stew, as in the first case, there was nothing already. The house burned completely. And after the fire, the minvati slices continued to actively smooth, they were wind throughout the village.
And now, I will tell you what the firefighters know about, but for some reason many builders do not know.
The mineral wool insulation is hygroscopic, that is, it is well drawn in moisture. To eliminate this shortage, manufacturers add additives to Cat (from 10 to 15%).
And they are combustible!
In addition, according to its structure, Vata passes air. When the flame is cut inside the house, negative pressure and air freely passes through the cotton room with fire. Because of which the effect of the vacuum cleaner is triggered, the warmed walls or the rafter system will burn with terrible force.
Therefore, at home, insulated with mineral wool, burns just like at home with a flammable insulation. The foam is just harder to stew, the firefighters try not to fit close, as it highlights poisonous substances when burning. So, by and large, there is no difference — the final one and the same!