March 6, 20251 yr We've gone for Norrsken Alu-clad windows for the majority of the glazing for our 200m2 build. We're not Passivhaus, but hoping to get near that level of performance (sub 1.0 air-tightness ideally). For those that have them, did you go for the 2 gasket profile (P31a) or the 3 gasket profile (P41a)?
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