I'm planning to renovate the upper floor and need to insulate. Is it possible to have, from the inside, gypsum, glue 100mm insulation to the gypsum, battens to create an air gap, and then the existing roof?
The reason I want to do this is that I eventually want to replace the roof, and I'm thinking that can be done from the outside, but it's good if the insulation stays. I also planned to raise the roof by laying appropriate beams on top of the existing beams, then insulating between the new beams and then laying a new roof with sheathing, roofing felt, and metal roofing.
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The reason I want to do this is that I eventually want to replace the roof, and I'm thinking that can be done from the outside, but it's good if the insulation stays. I also planned to raise the roof by laying appropriate beams on top of the existing beams, then insulating between the new beams and then laying a new roof with sheathing, roofing felt, and metal roofing.
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It can be difficult to seal tightly, i.e., you get gaps, gaps = cold. Normally, I think you "foam" these gaps with construction foam but I can't see how you could do that in this case.
Better then to screw the gypsum onto the battens and foam around it.
Better then to screw the gypsum onto the battens and foam around it.
Unfortunately, I can't answer that as I don't know the rest of the house's construction. I have something similar in my place where there's only masonite (for air gap on battens) and then regular wool boards.
Normally, I think people avoid using polystyrene as insulation except for foundations, basements, etc. It's a bit tricky since moisture can condense on the surface instead of inside like with wool.
What was there before?
Normally, I think people avoid using polystyrene as insulation except for foundations, basements, etc. It's a bit tricky since moisture can condense on the surface instead of inside like with wool.
What was there before?
