Why we use PIR insulation for our purenit boxes

2.10.2024 Ivan Landa

If we want to place exterior blinds in the contact insulation of the building, we have no choice but to replace the insulation on the lintel with a box for blinds. The missing insulation will create a rather massive surface thermal bridge. Therefore, it is logical to try to compensate for the missing insulation with more effective insulation and ideally to insulate the connecting joint and the window frame with it. For this purpose, we use PIR insulation in purenit boxes. It is 42% more effective than polystyrene and 71% better than mineral wool.

In addition, it meets the demanding requirements placed on the materials used in the facade and especially around the windows. It is a duroplastic material that does not burn and does not support burning. It is a moisture and mold resistant material. Does not react to building chemicals.

In our products, you can find PIR insulation with a thickness of 30, 40, 50 and 60 mm as standard. However, it is not a problem to produce Purenit boxes for exterior blinds or screen blinds with PIR insulation thicker than, for example, 80 or 100 mm.

The coefficient of thermal conductivity λ of the PIR insulation we use is 0.021 W/mK

Image description: Purenit box with PIR insulation 50 mm