Renovating an old (circa 1846) church
I’m looking at an old church to convert to a home, and trying to decide if I want to tackle the project. The church in question is a former Methodist church built in 1846. It is 34 x 44″ with no adornments, so it is a large open space with a roughly 16 ft. high ceiling. I’m assuming it is timber frame rather than balloon framed as it was strong enough to be moved onto a new concrete/ solid block foundation in the 1930’s to 40’s. They even put four 12″ I beams and columns under it so the foundation is solid. I don’t want to touch the exterior siding as it is original. The interior looks to have plaster walls, and it looks to be old 12 x 24 solid acoustical tile glued(?) to it. Believe it or not the tile looks to be in good shape.
Due to its size, I really don’t want to strip the interior plaster off. Just calculating the dumpsters full of plaster and the labor to do it gives me the shivers. Due to the size of it I’m not worried about losing floor space for a 2 bedroom house.
The big question is can I insulate over the old tile/ plaster interior walls without creating a moisture problem?
I’m in the middle of timber framing country, so SIPS are easy to get locally. One thought was to install drywall faced SIPS horizontally to the tile, and screw it through to the timbers. My concern is that the painted tile might act as a second vapor barrier. The second is to frame the walls and infill them with Roxul with a 4 mil poly vapor barrier and drywall over it.
I’d welcome any info as I’m just not sure how to attack this project.
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