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This is my first post on anything like this so sorry if I seem amateur. We have recently purchased a 1930's/40's semi. The party wall is double brick so it's 8 inches thick. The layout of the house is a typical semi. Stairs and bathrooms on kitchen on the outside. Bedrooms and living rooms on the inside. We can hear the neighbours on a regular basis. The brick or mortar must be of poor quality. We can even hear talking at times and basically hear everything that's said.
So doing my research I have decided to soundproof. It seems the best solution is a false wall built off the party wall. A minimim one inxh gap then a timber frame fixed to the ceiling, floor and adjoining walls with some isolation strip under the timber. Fill the stud with 50mm rwa45 insulation batts. Resilient bar then two layers of 15mm soundbloc plasterboard. All edges sealed with acoustic sealant. Also 100mm rwa45 insulation placed between the joists over the ceiling and under the floor two up to two feet from the wall to address flanking noise
Now the problem is I am quite a novice when it comes to buildings. The cavity I'm creating needs to be air tight or else the soundproofing is a waste of time. But will the cavity not need any kind of ventilation? Will the fact it's air tight cause any damp? Does it need a vapour barrier going in the new stud im creating? The party wall has no cavity it is just solid double brick wall. Any advice and help on this would be much appreciated
So doing my research I have decided to soundproof. It seems the best solution is a false wall built off the party wall. A minimim one inxh gap then a timber frame fixed to the ceiling, floor and adjoining walls with some isolation strip under the timber. Fill the stud with 50mm rwa45 insulation batts. Resilient bar then two layers of 15mm soundbloc plasterboard. All edges sealed with acoustic sealant. Also 100mm rwa45 insulation placed between the joists over the ceiling and under the floor two up to two feet from the wall to address flanking noise
Now the problem is I am quite a novice when it comes to buildings. The cavity I'm creating needs to be air tight or else the soundproofing is a waste of time. But will the cavity not need any kind of ventilation? Will the fact it's air tight cause any damp? Does it need a vapour barrier going in the new stud im creating? The party wall has no cavity it is just solid double brick wall. Any advice and help on this would be much appreciated