Pros and cons of polyurethane foam insulation It is thought
that polyurethane foam is a combustible material. Yes, it does burn, but so do all the polymer insulation materials. Absolutely do not burn only basalt fiber and keramsite and then subject to certain conditions. Also PPU burns only with direct exposure to flames. In addition, modern PPU have flame retardants and therefore are self-extinguishing.
Active use of PPU became possible not only due to its thermal insulation properties, but also ease of use. Foamed liquid insulation easily penetrates into the far corners of roofs, pipes, deformed surfaces.
Polyurethane foam is toxic. However, only wood and stone can be considered perfectly eco-friendly, and not treated with chemicals. Most plastic items release substances harmful to the body and nature. Therefore, the standards of maximum permissible concentration of harmful substances of air are used. New books, for example, highlight the lead contained in paint, the plating of a new car is a complex toxin, and such examples in everyday life are many. By the way, PPU foam releases residual gases only three days, after that it becomes almost safe.
A test was carried out which revealed that mineral wool held about 18% moisture. Penoisol absorbs 13 -14%, and high-density polyurethane foam holds only 1 -2% water. From this one can conclude that thermal insulation from PPU is quite hygroscopic. The insulated house will not freeze and will not be affected by fungus or mold. However, it should be remembered that the PPU must have quite high strength, otherwise this effect will not be possible.
Timely care for insulation — the guarantee of durability of
polyurethane foam is destroyed by about 1 mm per year. But if it is covered with oil or water emulsion paint, the insulation will last another 30 years.
If the surface is well skimmed and dried, then polyurethane foam sticks to almost everything, it allows to apply it even on sloping surfaces, which is very convenient and practical.
Unlike many insulators, PPU can be used both outside and inside structures. Even the walls of cars and bottoms of small vessels are treated with polyurethane foam.
So, if you comply with the rules of operation and use high-quality, dense polyurethane foam insulation, as well as choose to perform the work qualified specialist in this field, insulation will last many years and without harm to health.