Newbie needs some help - please.

  • Thread starter Thread starter keithcoady
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keithcoady

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Hi, first of all I'm new here. Hopefully I'm posting this in the correct section.

I have a room that is 24 feet long, 12 feet wide, and 7 feet high. Three of the walls are concrete with sheetrock covering them. The fourth wall has a door and 1/2 sheetrock on both sides with no insulation.

I need to soundproof the ceiling as our living room/dining room are above my soon to be studio. My plan is to remove one side of the sheetrock on the fourth wall and install Roxul and then install a double sheet of 1/2" sheetrock.

I also plan on sealing any air spaces around the door, electrical outlets, etc.

My main concern is the ceiling.

I had two ideas for that:
1. - install Roxul in the floor joists (they are at least 12" top to bottom) and then hang a suspended ceiling with acoustic tiles with more Roxul on top of the ceiling tiles.

2. install Roxul in the floor joists and then install 5/8" chipboard with 1x2s to allow installation of more Roxul and then cover it with more 5/8" chipboard. This would be very expensive and also very heavy. I'm concerned about the load on the floor.

As a note - they are not floor joists they are actually floor trusses which span the 24 feet with no need for supports.

I would also have to install 2x4s perpendicular to the floor trusses to allow clearance for pipes that are there for my heating system.

I haven't started anything yet as I can't afford to do this twice as I'm on a very limited budget.

I've posted a picture of the floor joists below.

Thanks for any and all assistance, comments, suggestions.

Keith - pic below

016.webp
 
about the only thing I could think of was to go ahead and stuff the insulation between the joists like you're talkin but when I went to hang sheetrock, I'd use decouplers between the joists and whatever framing you decide to use to mount the sheetrock to.
I've seen metal frames that the rock was attached to and wood frames.

I'll see if I can find a link to what I'm talkin about if I didn't explain it so well.
:D
 
Dogbreath said:
about the only thing I could think of was to go ahead and stuff the insulation between the joists like you're talkin but when I went to hang sheetrock, I'd use decouplers between the joists and whatever framing you decide to use to mount the sheetrock to.
I've seen metal frames that the rock was attached to and wood frames.

I'll see if I can find a link to what I'm talkin about if I didn't explain it so well.
:D
Click to expand...
^^^^^ this because if the sheetrock is directly fastened to the joists then the sound can transmit thru the joists to the floor above.

Hopefully Dog can point you to som kind of fasteners that keep them isolated 'cause I don't know.
 
actually, the second link is more like what I was thinkin.
 
Thanks so much for the replies, very much appreciated. Yes that looks like it would work very well but like you said it's quite expensive.

I realize the purpose of these isolation clips is to decouple the sheetrock and screws from the floor trusses but due to the costs it may not be doable at this time. I'll have to check my funds....lol, still have a lot of work to do and not much money to work with.

I just wonder how much of a difference these would make versus screwing the sheetrock directly to the floor trusses but using an acoustic caulk on the screws and the trusses and roll roofing between the trusses and the sheetrock.

I see home depot has an acoustic caulk that is not overly expensive, much cheaper than green glue at least and the roll roofing is very inexpensive compared to mlv.

Someone also suggested to me to use chipboard instead of sheetrock as it is denser. Anybody use this for a ceiling?

Thanks again for the replies, still doing a lot of research. Very difficult task to soundproof on a budget :(

Keith
 
Just tracked down a dealer in my province and asked for a quote on the Resilient Sound Isolation Clips | IsoMax. Can't hurt to ask. I already have the Roxul so maybe if I can get these clips and the necessary hardware I won't have to purchase anything else besides the sheetrock.

I somehow doubt the cost is going to be in my favour but you never know if you don't ask.
 
I dunno how feasible this is in your situation but I was in this guys studio and for decoupling, he used cut up chunks of tires.
Theory sounded right. Rubber doesn't transmit sound worth a shit.

Maybe you could work that in your plans.

?

Not too sure about screwing the rock straight to the joists, even with the caulk.
You're right, isolation on a budget's a beeyotch.

:D
 
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