Comparing open-cell foam with closed-cell foam, it should be mentioned that such spraying of the former has a much lower density, and thus is lighter for the building structure.
Open-cell foam is well permeable to water vapor. Hence, after the use of this type of foam purbudynek “breathes”, and at the same time such insulation has very good sound-absorbing (acoustic) properties.
Crossin foams are low thermal conductivity coefficient λ = 0.037,W/m2. As of 2021, energy efficiency requirements for buildings, for roofs and soffits impose a heat transfer coefficient value of U = 0.15 W/(m2K). By using Crossin Attic Soft foam with a small insulation thickness of 25 cm, a value of U = 0.148 W/(m2K) can be achieved.
An important feature of pur insulation is tightness. The way the foam is applied guarantees seamless insulation. Even with complex structures, this allows to eliminate 100% the appearance of possible thermal bridges.
Sprayed polyurethane foam permanently bonds to the substrate and resists sliding and displacement over the years.
The foam also does not lose its insulating properties over time.