Enclosed room on slab
In the midst of an enclosed porch over slab job. Plans initially included flash on un-vented roof, rigid foam on exterior, house wrap and fiberglass in walls.
It was initially assumed that the floor was on slab, however upon demo I found out it is actually 3/4″ plywood on 1×3 sleepers. Seems to be 15lb roof paper under sleepers. I removed some of the subfloor and found evidence of moisture and mold on both the sleepers and plywood. There was a leak in an exterior wall as well as in the hydronic heating so I am not sure if the mold is from that or from moisture making its way past the roof paper from the slab. what would ideal remedy here be? The slab is sloped a bit so installing foam with plywood on top wouldnt work by itself.
The slab is above grade about 14″ and exposed. Climate is 4a
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