Depending on the facings and thickness, PU can achieve a thermal conductivity as low as 0,022 W/mK to 0,028 W/mK.
This makes it one of the most efficient insulation materials available on the market. When compared to other materials, a much lower thickness of PU insulation is needed to get the same level of performance.
|Average initial thermal condictivity λi, 10°C W/mK||Declareted thermal conductivity λD, 10°C W/mK|
|Rigid polyurethane foam with waterproof coatings||0,020 - 0,022||0,023 - 0,024|
|Rigid polyurethane foam with permeable coatings||0,022 - 0,024||0,025 - 0,028|
|Spray polyurethane foam||0,022 - 0,024||0,028 - 0,031|
Average insulation performance value for 25 years of lifetime