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post #1 of 8 Old 05-01-2014, 09:12 AM - Thread Starter
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Wanted to get everyone's thoughts on an idea I had. I plan on building my theater with 1" XPS foam on foundation, then wood studs with fiberglass insulation between studs. I ultimately want sound insulation behind fabric along side and back walls. My question is, can I do that without adding drywall? If I could add 1 or 2 inches of sound insulation in front of studs then use a fabric rail system it would be very sound absorbent... Am I missing something? Fire risk?

Thanks.

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post #2 of 8 Old 05-01-2014, 09:24 AM
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From a soundproofing perspective your design will leak bass like a screen door.

From a future resale value perspective who would consider this a finished room for valuation/appraisal purposes?

Insurance claim for water or fire damage, good luck.

Local building codes? maybe yes maybe no. Where is the wiring for required outlets? As you say could be a fire risk.

Bottom line, one vote no.
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post #3 of 8 Old 05-01-2014, 09:58 AM
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Fabric is nice if you'd like to hide acoustic treatments and if it is preferred to paint for aesthetics and decreased light reflection. There will be virtually no soundproofing effect with the goal of keeping noise out or keeping noise in.
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post #4 of 8 Old 05-01-2014, 12:24 PM - Thread Starter
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Quote:
Originally Posted by BIGmouthinDC View Post

From a soundproofing perspective your design will leak bass like a screen door.

From a future resale value perspective who would consider this a finished room for valuation/appraisal purposes?

Insurance claim for water or fire damage, good luck.

Local building codes? maybe yes maybe no. Where is the wiring for required outlets? As you say could be a fire risk.

Bottom line, one vote no.

Ok, bad idea confirmed, will construct as usual and add acoustic insulation on top of drywall...

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post #5 of 8 Old 05-01-2014, 08:13 PM - Thread Starter
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One other question... What sound insulation do people recommend for this kind of application? In my current setup I used 703 insulation but I think that only comes in 2x4 feet pieces...
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post #6 of 8 Old 05-02-2014, 12:20 PM
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Sound proffing and acoustic treatment are two different things. Spray your concert walls with foam that is just for thermal and vapor barrier. Then you build your wall with IB-3 clips or the like to decouple it from the ceiling joists. Just use standard R13 insulation in the new walls and R19 in the ceiling joists. Not faced as you already have the vapor barrier. Then you do 2 layers of Drywall with GG on the walls DW/GG/DW. You will need clips and channel for the ceiling joists and any wall that does not back up to the concert with DW/GG/DW. This is sound proofing. OC703 Mineral wool and other treatments are for acoustics. Not that I did everything by the book but my build thread has enough for you to understand a little. Acoustics treatment did not start until the room is completly done sound proffing wise. Stuffing insoluation into the columns stage and soffits is a little of both.
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post #7 of 8 Old 05-03-2014, 07:42 AM - Thread Starter
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With 2" acoustic treatments behind fabric, how does one handle things like outlets? Does outlet box need to extend out 2" from finished drywall?
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post #8 of 8 Old 05-03-2014, 10:45 AM
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Quote:
Originally Posted by Ccondo1 View Post

With 2" acoustic treatments behind fabric, how does one handle things like outlets? Does outlet box need to extend out 2" from finished drywall?

 

I used 2" treatments.  I built boxes that were 2" for all of the outlets and sconce boxes.

 


The Moving Pictures Theater Construction Thread:
http://www.avsforum.com/t/1462881/th...ruction-thread

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http://www.avsforum.com/forum/61-are...l#post26079610
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