Finnfoam FF-PIR 30 SAUNA is mounted directly onto the wall frame structure and is equally suitable for use on solid substrates such as brick walls. Before installation begins, the substrate should be load-bearing, clean, dry and level, so that the boards can lie flat and the future vapour-tightness is not compromised by voids or tension. Precision is especially important in sauna construction, because temperature, moisture and vapour pressure act continuously on the entire wall structure.
The aluminium surface on both sides performs a central technical function. It not only improves the thermal performance of the system, but also forms a very dense moisture barrier. For this reason, board joints, transitions and connections should be executed carefully and in line with the system requirements. Poor workmanship at joints can impair the functional reliability of the build-up, even if the board itself has high-quality technical properties.
With a thermal conductivity of λD = 0.022 W/mK, very good dimensional stability and an operating temperature range from –50 to +120 °C, the material is designed for demanding conditions. It can even withstand temperatures above +200 °C for short periods. This makes the board especially attractive for saunas, where not only insulation performance but also thermal resistance and dimensional stability are critical. At the same time, its low weight keeps installation easy and places only minimal load on the structure.
Proper storage before installation is also important. According to the product information, the packs are only suitable for short-term storage on site in the original packaging, as this packaging is not waterproof. For longer storage, the boards must be protected from moisture and UV radiation. This point should not be underestimated, as correct storage is part of proper installation practice and supports the long-term quality of the final result.
FF-PIR 30 SAUNA is suitable for private and commercial sauna projects, for refurbishments of existing installations and for new builds where space is limited but very high insulation performance is still required. Thanks to the combination of PIR core, aluminium facing, CE marking, EN 13165 compliance and M1 indoor air classification, you get a technically convincing insulation solution that reliably keeps heat inside the room and protects adjacent building components from moisture.
