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- 2 Jan 2019
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The party wall on my house is solid brick. No cavity. Two brick width thick so nine inch. I'm building a stud frame between ten mm and an inch away from the party wall in an attempt to soundproof. The gaps in the stud will be filled with rockwool. One side of the stud will be fixed to an exterior wall but the exterior wall is cavity. My question is will I need a vapour barrier anywhere in this stud? I'm thinking more of moisture/warm air getting through and the gap between the wall and the stud being cooler. By rights the gap should be air tight. The plasterboard will be sealed for soundproofing purposes so by rights it should be air tight but I'm guessing moisture could still get through seeing as all materials breathe? Very much a novice with all this and the last thing I want is to cause mould and damp problems but I also want a soundproof wall to work which means being air tight