Double-Stud Walls with Recycled Fiberglass Batts
Hi All- I am a happy homeowner handyman electrician type- I am tackling a garage conversion. I plan to insulate the slab with 2” Polyiso sheets. 2×4 sleepers tapconned into the slab and advantech subfloor. 6 mil vapor barrier under everything
The existing walls are 2×4 with fiberglass batts. I plan on adding another 2×4 wall to the interior ( 1/2” gap between the two walls) and insulating the cavities with fiberglass batts. Upstate NY Zone 6
Being conservative- I’d like to use the existing batts- they are well installed and in fine shape.
Am I asking for trouble if both layers of the double 2×4 wall have a facing/vapor barrier?
Existing exterior wall is 1/2 OSB sheathing, Tyvex and vinyl siding
Thank you for your considerations.
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