Soundproofing

Greetings All, What is the best way to soundproof 2x4 interior walls? I realize that to isolate one wall surface with some kind of standoffs so the drywall doesn't attach to the studs is best. But that's not an option here. Fiberglass doesn't look like it is too effective. Are there any other options? TIA, Mark
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someone posted this link here a while back
http://www.soundproofing.org /
they have the drywall standoffs you mention you can't use in this application
they also have soundproofing mat you could possibly attach to the wall, and they say this about the mat as to flammability:
"Super Soundproofing Mat passes all FAA burn tests for use in aircraft. We will fax you specific info about UL, ASTM for specific thickness you need. In general, SSP Mat has a flame spread index of less thant 25 and a smoke developed index of less than 50 for all thicknesses up to and including 1" when tested to ASTM E 84 and CAN ULC S-102
Withstands temperature of 250 degree F when tested according to ASTM C 411. At this temperature, shows no evidence of flaming, glowing, smoldering, delamination, melting or insulation colapse. Although this material will withstand high temperatures, continuous use should be limited to 180 degrees F."
have no idea as to any environemntal issues of the mat, resolve any such issues before using in your particular application

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Mark L. wrote:

Follow the link effi posted. You will find a lot of practical information there.
Before that however, consider the word "best"
Life is full of tradeoffs. Consider cost and work as well as ability to block or absorb sound as part of your best.
Also pay close attention to all the ways noise moves from place to place and the different kinds of noise sources.
Some quick suggestions:
* Look at air to air openings like heating ducts. * Additional layer of drywall. * Look overhead - could the noise be going around the wall. * Doors, a lot of noise can come through that small crack at the bottom. * Source of noise, speakers or machinery can be isolated from the floor or wall too provide a lot of noise reduciton. * Carpet etc. can absorb a lot of noise.
--
Joseph Meehan

26 + 6 = 1 It's Irish Math
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Thanks Joe, You brought up a few ideas that I didn't think of.
Joseph Meehan wrote:

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A better link to soundproofing walls is at: http://www.soundproofing.org/infopages/channel.htm
wrote:

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