Looking for review of a new home wall I am planning to build.
I live in a northern Saskatchewan community where high r-value walls are essentially unheard of and the local building inspector requires an interior vapour barrier unless we use spray foam. Spray foam is insanely expensive hear so I have come up with this wall. The key is I want is air tight, no thermal bridging and requiring very little change in framing technique.
Here is my plan from the inside out. The framing 1s 2×6 16oc
“Membrane” variable perm vapour barrier
Roxul R22 insulation
3/8 plywood. Seams caulked and taped.
Tyvek drain wrap (to mind the gap)
2inch (R10) XPS insulation
1×4 furring strips
Cement board siding.
I figure this will allow adequate drying in the event of any moisture penetration as the membrane VB has lower perm rating with increased humidity and the Tyvek Drainwrap allows for some drying to the exterior despite the low perm foam board.
This would satisfy the building inspector and allow breathing. I hope.
Any thoughts.
Replies
jab
Search out Mooney Wall on this site-might add to your project.
Go to Building Science Corporation and look for the details of the their cold Climate wall construction.