Room over garage
Climate zone 4c / Seattle / New construction
We are building a new house which has a studio over the garage deck. The raised subfloor of the studio is built with 2×4 sleepers over garage deck. The subfloor sheathing for the garage deck and studio is Advantech.
How do we detail the void spaces between the sleepers? I am worried about moisture getting in there either through condensation or leaks. Currently, the plan is to fill the voids with XPS and tape the seams. However, I don’t trust this solution to get rid of all air pockets.
Any thoughts on this would be greatly appreciated.
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