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post #1 of 11 Old 08-11-2011, 03:44 PM - Thread Starter
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Hi everyone - I am looking for local insulation suppliers and found someone that carries Thermafiber. These are the options they gave me (I removed the pricing since I think that's against the rules?)

Thermafiber IB 1240 (32 sf per bag)
Thermafiber IB 1240 (128 sf per bag)
Thermafiber unfaced Safing (40 sf per bag)
Thermafiber 1x24x48 (144 sf per bag)

Anyone have experience with any of these? I am looking to insulate my side walls up to 48", my screen wall completely, and inside my ceiling (drop ceiling).

Thanks!
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post #2 of 11 Old 08-11-2011, 03:59 PM
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The 1" is listed here:

http://www.bobgolds.com/AbsorptionCoefficients.htm

Not quite as good as Linacoustic and the usual suspects, but not too far off. You can check the manufacturer site to see if they have coefficients for the other materials you mentioned.
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post #3 of 11 Old 08-11-2011, 04:03 PM - Thread Starter
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Here are the coefficients from the data sheet they sent me... I thought these looked pretty good, was considering the 4 or 6 inch for the ceiling.

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post #4 of 11 Old 08-11-2011, 06:42 PM
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post #5 of 11 Old 08-12-2011, 06:22 AM
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Kelton, what are you looking to accomplish? Proper reverb? Soundproofing?

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post #6 of 11 Old 08-13-2011, 02:39 PM - Thread Starter
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Main goal is soundproofing. I am by no means an audiophile so the biggest concern is not blasting the rest of the house when I'm watching a movie/game.
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post #7 of 11 Old 08-13-2011, 10:40 PM
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Oh, I was thinking you were going to use for acoustic treatments, not soundproofing, hence the Bob Gold's link. I'll leave you in the capable hands of Ted for soundproofing guidance - a lot more to it than insulation.
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post #8 of 11 Old 08-14-2011, 04:08 AM - Thread Starter
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Thanks, I have done a lot of research on soundproofing and it's pretty clear that dd/gg/clips combination is the best. My ceiling situation is a major problem... Currently it's a drop ceiling that hides extensive duct work, plumbing, gas lines, and the air conditioner compressor lines. Moving them or framing down around them is not an option budget wise, so I'm looking for a good insulation option to limit sound escaping through the ceiling.

I would be using the Thermafiber on the walls to for acoustic treatment, and I'm pretty clear on my plan there (1" mineral wool up to 48" on side walls and full coverage behind false screen wall). The main problem I'm trying to solve is containment through the ceiling.
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post #9 of 11 Old 08-14-2011, 08:17 AM
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You can add that kind of insulation, but it won't help much (at least for low frequency control). I redid my family room and insulated the ceiling and interior walls, and while it's better than it was originally, there's still not enough sound reduction. That is, begin playing music/movies anywhere near reference levels, and you can easily hear it upstairs. With a drop ceiling, you're not going to be able to accomplish much in the way of sound proofing.

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post #10 of 11 Old 08-14-2011, 08:46 AM - Thread Starter
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Thanks for sharing your experience Bob... so even at the 1.37 coefficient at 125hz for the 6" thickness, I shouldn't expect much control of the lower frequencies?
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post #11 of 11 Old 08-15-2011, 08:26 AM
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Quote:
Originally Posted by ctviggen View Post

You can add that kind of insulation, but it won't help much (at least for low frequency control). I redid my family room and insulated the ceiling and interior walls, and while it's better than it was originally, there's still not enough sound reduction. That is, begin playing music/movies anywhere near reference levels, and you can easily hear it upstairs. With a drop ceiling, you're not going to be able to accomplish much in the way of sound proofing.

Good points

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