Insulating wall in rear entry/vestibule of 1909 house (slightly atypical case)

House is in Portland, Oregon. The back of my house has an entry vestibule or stoop or what-have-you, its a room that has a storm door to the exterior and a normal door to the interior, but its not climate controlled. I'm tearing out the beadboard in this room because it has high lead content paint (doing it by the book). There are two walls that are shared with the interior that are empty (they had plaster/lath and beadboard). I'm not messing with insulating the exterior walls of this house for fear of moisture problems, but these inner walls are completely protected from weather, they just see the normal temp difference/moisture difference of the two areas. Can I insulate these two walls with rockwool and be ok? Or is some type of vapor barrier still appropriate? submitted by /u/no-its-berkie [link] [comments]

Feb 11, 2025 - 22:59

House is in Portland, Oregon.

The back of my house has an entry vestibule or stoop or what-have-you, its a room that has a storm door to the exterior and a normal door to the interior, but its not climate controlled.

I'm tearing out the beadboard in this room because it has high lead content paint (doing it by the book). There are two walls that are shared with the interior that are empty (they had plaster/lath and beadboard).

I'm not messing with insulating the exterior walls of this house for fear of moisture problems, but these inner walls are completely protected from weather, they just see the normal temp difference/moisture difference of the two areas.

Can I insulate these two walls with rockwool and be ok? Or is some type of vapor barrier still appropriate?

submitted by /u/no-its-berkie
[link] [comments]