Insulating drylocked basement
I am doing a major renovation and have my basement stripped down to the concrete foundation blocks and studs on the walk-out side (wood framed). Unfortunately, the entire below-grade concrete blocks are covered with drylock which now acts as a water/vapor barrier to prevent the blocks from drying out. Anyway, I'm trying to identify the best insulation method for this space.
I will be caulking all seams, then will spray the wood-framed side with 2" of closed cell foam. On the concrete walls, I am thinking of using 2" styrofoam wallmate before attaching mold-resistant gypsum boards. I could go up to 3.5" on some walls by pairing 2" styrofoam and 1.5" wallmate. Is this the best option? Do I need a vapor barrier between the wallmate and the gypsum boards? Should I consider other approaches?