Hello,
I will soon have a visit from the carpenter again, but in the meantime, I would like to gather some opinions on the following matter. Our renovated old building currently has roughly the following roof structure: tiles, battens, 160mm (6.3 inches) PUR foam insulation, vapor barrier. I hope I haven’t forgotten anything. We have now decided to leave the old roof frame (rafters, truss) exposed. They have already been sanded and treated. To attach the gypsum boards between the rafters, we installed 30mm (1.2 inches) profiles, which will now be insulated with 24mm (0.9 inches) insulation (unfortunately, 30mm (1.2 inches) was not available). According to what we were told, this thickness is so small that no additional vapor barrier is necessary.
The question now concerns the attic. Nothing here is to remain exposed, so the entire rafter will be additionally filled with mineral wool insulation. That means 160mm (6.3 inches) PUR foam, then a membrane, then 160mm (6.3 inches) Isover mineral wool insulation, and then? Should there be another vapor barrier or should we install the gypsum boards immediately? I would be very grateful for an answer.
Wishing everyone a Happy New Year.
I will soon have a visit from the carpenter again, but in the meantime, I would like to gather some opinions on the following matter. Our renovated old building currently has roughly the following roof structure: tiles, battens, 160mm (6.3 inches) PUR foam insulation, vapor barrier. I hope I haven’t forgotten anything. We have now decided to leave the old roof frame (rafters, truss) exposed. They have already been sanded and treated. To attach the gypsum boards between the rafters, we installed 30mm (1.2 inches) profiles, which will now be insulated with 24mm (0.9 inches) insulation (unfortunately, 30mm (1.2 inches) was not available). According to what we were told, this thickness is so small that no additional vapor barrier is necessary.
The question now concerns the attic. Nothing here is to remain exposed, so the entire rafter will be additionally filled with mineral wool insulation. That means 160mm (6.3 inches) PUR foam, then a membrane, then 160mm (6.3 inches) Isover mineral wool insulation, and then? Should there be another vapor barrier or should we install the gypsum boards immediately? I would be very grateful for an answer.
Wishing everyone a Happy New Year.