I’m having a metal pole building constructed for a shop and am concerned about noise noise control. Building is about 100′ from nearest house. My idea is to insulate the walls with 6″ of insulation and install 2 layers of 1/2″ drywall glued together for density. Ceiling would be insulated with 12″. Entry and garage doors are also insulated. Would this work or are there better ways.? Thanks for any ideas.
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you could use spray foam for insulation instead.
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Layer of sound board underneath the sheetrock?
Stuff is cheap, easy and fast.
Carpenter / Builder, Rhode Island
What is sound board?
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I was reffering to Celotex Soundstop. It's a readily available brown fibreboard sold in 8x4 sheets. It's real light and easy to install.Use minimal nails and GLUE it to the studs for best results. Minimize seams by running them long ways, perpendicular to the sheetrock.I've used this stuff a lot and it makes a big difference when installed properly.http://www.knightcelotex.com/productline/soundstop/ss_overview.aspIt has a funny smell to it, just like that crappy GP trim (Georgia Pacific). I think it's the same kind of composite material. Dunno why anybody would trim their house with that stuff.
Carpenter / Builder, Rhode Island
Thanks for your ideas. I'm a contractor also but have no experience with sound control. The building will also have a metal ceiling. Think it might be a good idea to install that Celotex under the metal? That plus 12" of insulation in the ceiling might control sound going through the roof. Not looking to soundproof it just tone it down. Is the Celotex sound board better than the extra layer of drywall? Thanks again.
a factor also to consider may be the amplification of sound due to slightly loose metal parts anywhere in the barn structure?
A critical part of noise isolation is eliminating all small air gaps that the sound waves can shoot right through. That's why they sell acoustic doors - they do not have the air gap around the frame like a normal door. This fact is often overlooked by the people actually doing the construction details.
That being said, the best way to insulate the building (both acoustically & thermally) is with spray foam insulation like Piffin said.
The 1/2 lb foam is the best sound absorber and is also only R3.7 per inch compared to 2 lb density foam at R6.5/inch. Either foam, correctly installed, will seal all tiny air gaps and drastically cut down on sound transmission through the building envelope.
Stu
I have buiilt many band practice rooms, recording and sound studios. I could talk all day about it.
Spray foam is not the answer to good soundproofing. And it would take forever. The soundboard also acts as a dampner between the studs and the sheetrock, eliminating vibration. Vibration = sound.
Carpenter / Builder, Rhode Island
comparable to homasote?
"If you pick up a starving dog and make him prosperous, he will not bite you. This is the principal difference between a dog and a man." - Mark Twain
I agree it is not the be all end all of sound insulation, but it will absorb three or four times as much sounmd as FG batts will - and I'll have to correct you on the install time. One day, in and out and it is done.i've used homasote before behind rock as a buffer board, but didn't know about this soundboard.
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Yeah I've only ever used spray foam for filling small cracks and other misc uses. Actually I've filled loads stuff with it, just never full walls. I stand corrected :-)Homasote has a higher STC rating, but for the job in hand, Soundstop would be an ideal solution. And it's 4x cheaper.Depends how serious you want to get about it.Cons for soundboard = requires using deeper electrical boxes and you'll lose an extra 1/2" of wallspace per wall. Not really a big deal though.
Carpenter / Builder, Rhode Island
What kind of "shop".
If it is wood working and the most noise is the router or table saw you really don't need to be concerned. Just have good seals on the doors and windows and any gaps.
Try it in your hosue. Run a router and then go outside and see how bad it is.
Now if you are doing metal working shop with power anvils, forges, and stamping presses then that is a different story.