Hi.
I'm finishing a section of my basement that has a 4' concrete pony wall (below grade foundation) with 4' framing set on top. The framing is set back on the top of the foundation by about 4". I'm planning a new wall flush with the foundation to a new top plate on the floor joists above, no ledge. My question is about the vapor barrier.
The concrete wall will be insulated with EPS then fiberglass in the new wall against the EPS rigid board, so the EPS will act as a vapor barrier against the cold wet concrete, but what should I use as a vapor barrier on the framing above the foundation?
If I continue the fb in the new wall to the ceiling, do I use 6 mil on the warm side of fb on the top half of the new wall then tuck it behind the EPS where it meets the foundation? Doesn't seem right working the 6mil around all the studs, lots of holes.
Or...do I insulate only within the existing framing on top of the foundation, put 6 mil on the warm side of that, and tuck into the EPS where it meets the foundation? This would leave air gaps between studs of the new wall and behind, also doesn't seem right. I read somewhere air gaps in basement walls promote air flow increasing moisture movement and drafts, maybe that's called convection.
I'd like to stuff the entire cavity (created with the new framing above the pony wall) with fiberglass (or something else, suggestions?) but can't find a definitive answer on where to put the vapor barrier.
I live in Vancouver Canada, the house was built in 1962.
Thanks eh,
c.
I'm finishing a section of my basement that has a 4' concrete pony wall (below grade foundation) with 4' framing set on top. The framing is set back on the top of the foundation by about 4". I'm planning a new wall flush with the foundation to a new top plate on the floor joists above, no ledge. My question is about the vapor barrier.
The concrete wall will be insulated with EPS then fiberglass in the new wall against the EPS rigid board, so the EPS will act as a vapor barrier against the cold wet concrete, but what should I use as a vapor barrier on the framing above the foundation?
If I continue the fb in the new wall to the ceiling, do I use 6 mil on the warm side of fb on the top half of the new wall then tuck it behind the EPS where it meets the foundation? Doesn't seem right working the 6mil around all the studs, lots of holes.
Or...do I insulate only within the existing framing on top of the foundation, put 6 mil on the warm side of that, and tuck into the EPS where it meets the foundation? This would leave air gaps between studs of the new wall and behind, also doesn't seem right. I read somewhere air gaps in basement walls promote air flow increasing moisture movement and drafts, maybe that's called convection.
I'd like to stuff the entire cavity (created with the new framing above the pony wall) with fiberglass (or something else, suggestions?) but can't find a definitive answer on where to put the vapor barrier.
I live in Vancouver Canada, the house was built in 1962.
Thanks eh,
c.