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