Spray Foam on Exterior Walls, Cellulose to Interior
I am wondering if having spray foam applied to my exterior walls in about 1” thickness will cause any problems if I place cellulose in the interior side of the spray foam in my 2×6 cavity.
on the exterior I have plywood, tyvek, furring strips, and pine siding. My plywood seams are all taped but I fear I have not taped the where the plywood meets the top plate and also where the bottom sheets meet the sill.
Would this create a vapor sandwich if I used open cell instead of closed cell and would this result in a more airtight structure? Is it worth it?
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