High roof thermal insulation optimally, with the use of Innopan PIR thermal insulation boards
Innopan PIR thermal insulation boards also offer an optimal choice when constructing newly built or renovated high roofs. With an exceptionally high degree of efficiency (λD = 0.022 W/m²), they ensure the thermal protection of houses in winter and summer. Based on their installation in the roof structure, we distinguish between three different installation methods: thermal insulation above the rafters, between the rafters and under the rafters, or a combination of these layers. Among the above, the thermal insulation between and under the rafters is a less recommended design in itself today, but it can be used especially in the case of renovations if the professional, construction and other relevant regulations can be met. The most common version of the combined thermal insulation is the PIR thermal insulation placed between the rafters and above the rafters, but a PIR thermal insulation board can also be installed to form the cladding on the inside.
Value expected according to hungarian regulation U = 0,17 W/m2K
In Hungary, the heat transmission factor (U value) will be subject to new energy requirements from 2024, which were set out in Decree 7/2006. (V. 24.) regulated by TNM decree. This maximizes the U-value of high roofs at 0.17 W/m2K. Of course, the regulation applies to newly built buildings, but it can also be a good guideline for renovations. The thermal insulation limit specified in the decree can be met with the 120-130 mm thick version of the Innopan PIR ALU/Therm thermal insulation board.
Recommended value U = 0,13 W/m2K
The decree clearly defines the minimum requirements for thermal insulation, but at the same time, with a few centimeters of extra thermal insulation material, we can take a significant step towards a more energy-efficient home. In practice, this not only has a positive effect on living comfort - as it reduces temperature fluctuations - but also saves a significant amount of energy. The maximum thermal transmittance factor recommended by Innopan is U = 0.13 W/m2K, which requires a 160-170 mm thick thermal insulation layer using the Innopan PIR ALU/Therm thermal insulation board.
Passive house standard U = 0,10 W/m2K
A passive house is a building that is extremely energy-efficient, has low energy consumption, and provides a high level of comfort for the residents. Accordingly, the U-value of the installed thermal insulation far exceeds the standard defined by the decree. For the boundary structures of passive houses, the achievable thermal transmittance limit U = 0.10 W/m2K. To exceed this value, a 210 mm thick thermal insulation layer is required using Innopan PIR ALU/Therm thermal insulation boards.
