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Home Soundproof Garage - Garage Conversion Stage 4
Garage Conversion Stage 4
Stage 4 of Chris Whealy's Excellent Garage Conversion

Soundproof a Room Stage 4 Part 4

Soundproof Garage

Construction of the outer wall was actually last stage to be completed, but I'll put it in here because it fits at this point.

The outer wall completed with the doors hung and an access hatch to the roof space above the practice room. The holes drilled in the door are to allow air in when the extractor fan it running.

It was at the point when I put the plasterboard on the outer wall that I discovered how much of a problem had been created by mounting the internal ceiling directly to the roof joists of the garage

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Soundproof a Room Stage 4 Part 3

The inner walls of the practice room were then boarded out with a double layer of plasterboard.

stud wall soundproof

Boarding out the inner walls

A standard door (in the UK at least) is 30" wide. However, I thought that in the future, I may want to put something large like an upright piano into the practice room. Therefore, I put in a 33" door to give that bit of extra space

 
Soundproof a Room stage 4 Part 2

Erect the inner stud wall

The stud frame for the inner wall was put up next. It would have been better to avoid connecting the top of the uprights to the rafter joists. This causes sound to be transmitted from the inner walls into the exterior frame of the building. This turned out not to be a massive problem, but the room would have performed better had the situation been designed around.Soundproof Garage inner walls soundproof room rockwoom insulate

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Soundproof a Room Stage4 Part1

The floor and walls of the inner room can easily be isolated from the concrete garage floor by putting down a 25mm (1") layer of polystyrene sheet. Despite being polystyrene, this material is very strong in compression. It will provide very good thermal insulation, but more importantly, it will for prevent vibration from being transmitted from the walls down into the floor and therefore into the main structure of the building..

Drummer Soundproof Room Building Stage4 Part1

Polystyrene sheeting laid on the floor

Lay floor chipboard flooring
The floor is made from regular toungue-in-groove chipboard that is laid in place. It was not fixed to either the surrounding walls or floor. The floor will be held in place by the stud wall that was put up next.
 
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