Shawnshawn
Member
- Joined
- Oct 23, 2016
- Messages
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Hoping someone could help me. I don't want my house to be featured on a 'Don't Reno Like This' TV show
I have an 1860 home. Heating bills are insane. The wall, currently, is as such (inside to outside):
- Lathe & Plaster (painted w occasional wallpaper)
- Nothing - 4" cavity
- Barn board
- Black felt
- Wood siding, painted
I really don't want to demo the existing interior walls.
What I'd like to do is attach rigid foam board (2 - 4") to the interior existing plaster walls and cover with drywall. I'd probably use fresh framing/studs as I'd like fresh wiring, and it adds strength / good for cabinets, etc. Although *I could* just screw right through the drywall&foam to the old studs, with long screws, and skip the framing.
So my question is - If the interior foam board becomes my vapour barrier, does this pose a problem? Is there an issue taking what is currently an interior lathe plaster wall (painted, occasionally w wallpaper) and suddenly making it part of the "exterior" as it would be on the cold side of the foam board?
Any insight is GREATLY appreciated.
Kind Regards
Shawn
Ps should I use two or four inches of foam?
I have an 1860 home. Heating bills are insane. The wall, currently, is as such (inside to outside):
- Lathe & Plaster (painted w occasional wallpaper)
- Nothing - 4" cavity
- Barn board
- Black felt
- Wood siding, painted
I really don't want to demo the existing interior walls.
What I'd like to do is attach rigid foam board (2 - 4") to the interior existing plaster walls and cover with drywall. I'd probably use fresh framing/studs as I'd like fresh wiring, and it adds strength / good for cabinets, etc. Although *I could* just screw right through the drywall&foam to the old studs, with long screws, and skip the framing.
So my question is - If the interior foam board becomes my vapour barrier, does this pose a problem? Is there an issue taking what is currently an interior lathe plaster wall (painted, occasionally w wallpaper) and suddenly making it part of the "exterior" as it would be on the cold side of the foam board?
Any insight is GREATLY appreciated.
Kind Regards
Shawn
Ps should I use two or four inches of foam?