Building drum booth in garage

[Flynman]

I am building a drum booth inside my garage. The area will be approx. 10x13 with 11 foot ceiling height. My question is: Will building a room with double sheetrock walls (both sides of studs), ceiling, inside the existing garage be enough to keep sound from getting out. I was thinking of building a room inside the garage and then a room inside that room. I was reading about triple leaf issue for glass does that go for sheetrock walls also? I plan on using 5/8 sheetrock, Green glue & 2x4 construction with accoustic floor. any help would be appreciated.


Thank you
Keith

[Flynman]

I would like to add that I was thinking of adding a synthetic carpet felt between sheetrock layers possibly. This is about 1/8 inch fiber padding mainly used for Berber carpet. I use to install flooring so I am used to working with material and could get it to lay flat between the sheets of sheetrock. Any opinions?

[avare]

Triple leaf goes any material including gyproc or any combination of. You put the carpet in between your layers and you are creating a triple leaf.

[Flynman]

What about building a room inside the garage with duoble sheetrock on both sides of studs. Then hang sound curtain between room walls and garage walls. Will this help in getting better soundproofing?

[bpape]

If you build a room inside the garage and use double drywall and green glue between the layers, you'll get about as good as you're going to get short of adding a 3rd layer of drywall and another layer of green glue.

Just remember that ANY leak in the room will let sound out. No holes for outlets, switches, lights, cables, etc. All have to be surface mount or boxed in MDF and sealed. The floor will need to be dealt with also or the sound will just flank through the concrete slab.

Bryan

[jwl]

Do NOT put your sheetrock on both sides of your studs. Doing so adds 2 leaves to the existing one leaf of the garage, and will not give you as much isolation. Frame the wall, and put all layers of sheetrock on one side, with Green Glue between each layer.

There is a 23dB difference in isolation between the above 2 approaches, having 2 leaves gives much better isolation. So keep the sheetrock all on one side.

2 layers of sheetrock with Green Glue will work great, 3 layers of sheetrock with 2 layers of Green Glue will be even better.

[Flynman]

Thanks. I was not sure about that. I think I am going build room in a room with isolation channels on studs then 1/2 sheetrock, green glue then 5/8 sheetrock. The walls will built on isolation rubber and floor will be seperate from walls. Quiet batt between studs. What about ceiling? Acoustic drop ceiling or double sheetrock? I have part of a room above garage ceiling.

[jwl]

your best bet in terms of isolation would be to run new ceiling joists and install a new ceiling over the new walls. Seal it up, make it airtight, room-in-a-room.

Short of that, I'd consider a double-layer of sheetrock with greenglue attached to a hat channel with RISC-1 clips to the existing ceiling joists. Make sure everything can handle the weight OK....

[Flynman]

Thanks JW!! Existing ceiling joists are 2x12 and walls are 2x6 so I'm in good shape structurally. I am just really getted started with reading as much as I can about all of this. It is definetly a big task if you want to do it right.




Keith