We are in the process of renovating our house from 1950. Right now we are fixing the garage roof, which also serves as a terrace. When we moved in, there was roofing felt on the terrace floor, but water pooled and the concrete underneath turned out to be completely crumbled (the previous owner had laid non-frost resistant tiles as flooring, which had cracked and damaged the underlying material...). We scraped off all loose material and poured new concrete. The slope is very slight since the roof has functioned as a terrace (we know this is a risky construction, but we want to keep the terrace). To moisture insulate, we first thought of "painting" cold asphalt onto the concrete, then laying underlay felt, and on top of that, laying roofing felt (such as Mataki Självtäck 3). On top of this, we want to have a wooden deck.
When I read about roofing felt, it is recommended to nail or screw it down, but since we have a concrete slab underneath, this seems like a cumbersome approach. Therefore, we considered whether we could instead use asphalt adhesive to glue the underlay felt to the concrete and the roofing felt to the underlay felt. However, I can't find good information on whether this is a good or bad way to do it.
Does this moisture insulation sound like an OK approach, or do you recommend we do something else? We would prefer not to have to redo the work in the coming years as the rest of the house also needs renovating...
When I read about roofing felt, it is recommended to nail or screw it down, but since we have a concrete slab underneath, this seems like a cumbersome approach. Therefore, we considered whether we could instead use asphalt adhesive to glue the underlay felt to the concrete and the roofing felt to the underlay felt. However, I can't find good information on whether this is a good or bad way to do it.
Does this moisture insulation sound like an OK approach, or do you recommend we do something else? We would prefer not to have to redo the work in the coming years as the rest of the house also needs renovating...
Are you curious about how you did it as I have a similar problem?[/QUOTE]