Hi. I have an old house built with lime mortar and render. Inside, the lime plaster has been painted and papered over the years, before my ownership. The internal plaster has crumbled and come off the brick across the whole front bay leaving a gap behind the skirting of over an inch, allowing cold and moist air from the floor void into the room. Given there doesnt appear to be a damp course (built C.1880) and the wall has lime mortar, will it be ok just to squirt expanding foam down behind the skirting to hopeful fill the gap, stop the draft, or will this suck moisture from the wall onto the back of the skirting, slowing rotting it? (even though original plaster must have been in contact with the wood) I dont plan to replace the plaster.
Many thanks to anyone who has long term experience or knowledge on expanding foam and moisture. Cheers
Many thanks to anyone who has long term experience or knowledge on expanding foam and moisture. Cheers