john
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Posts: 9 
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Post by john on May 21, 2016 23:00:11 GMT
Hi, first post here: planning to build a basement studio based on the Maximum studio plan. The ceiling is exactly 8' to top of gap between support beams. Although the easiest approach is filling with fluffy fiberglass and covering with fabric, I was hoping for better isolation from the kitchen above, so I'm weighing adding a sheet rock ceiling and building an absorbent cloud below. The resulting ceiling boundary will be 7'6". Will I be sacrificing too much in the way of a good sounding room to gain a bit more isolation?
Thanks.
John Mulkerin
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Post by Hexspa on May 22, 2016 9:28:29 GMT
I've never built a studio or done much in an effort for isolation beyond closing doors and windows but I surf the web a lot. I don't think a layer of sheet rock is going to do much in the way of isolation - maybe 10dB max at higher frequencies. An 8' ceiling is already considered short for a studio. In this treatment of a room with low ceilings the approach was for 12" fluffy. Sight unseen, and with minimal qualification, I'd advise to do as Ethan has chosen and forgo limited isolation. Thanks, -m |
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Deleted
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Post by Deleted on May 22, 2016 12:50:57 GMT
I have **no idea** regarding height for a studio, so I cannot offer help there Im afraid.
With regard to stopping sound from getting above two things only will do that.
*TOTAL* sealing - i.e. airtight and *MASS*
For mass - we have 'double weight' plasterboard. I am sure you will find a similar thing with sheetrock - the word 'acoustic' may be in the description, but that usually doubles the $$
This is fixed directly to the underside of the ceiling above (i.e., the underside of floor of the room above.)
Seal *EVERY* joint with acoustic mastic, and I mean seal & every joint. This is the only way to stop 'flanking' noise.If you can get to where the joists sit on the wall - there is always plenty of gap there.
I would apply two /three or if possible four layers of this, and the job will be as good as you can physically do it then.
Now - start to look at acoustics - an entirely separate subject!
PS - rock wool / fluffy fibreglass/rockwool is great for acoustics / traps - does next to nothing for sound isolation.
If air can get through - sound will follow.
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Post by Rock on May 22, 2016 14:56:38 GMT
Great advice Steve, I'd add that using resilient channel "RC" or double wall construction to "decouple" sound vibrations but better yet, start by reading this book www.amazon.com/Home-Recording-Studio-Build-Like/dp/143545717X I'd emphasize that sound isolation between rooms and acoustic treatment are two separate issues and acoustic treatment will have little effect on keeping adjacent rooms quieter. Cheers, Rock |
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Post by Ethan Winer on May 22, 2016 16:14:12 GMT
Losing six inches of height out of eight feet is not a big deal, especially if you can get more isolation that you want. But sound doesn't travel only up through the ceiling. Sound in the room hits the walls, and those walls are coupled to (touch) the rest of the structure.
--Ethan
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john
New Member
Posts: 9
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Post by john on May 22, 2016 17:41:19 GMT
Thanks for all the feedback, it has all been helpful. Will scale the plan according to the reduced height and will be most likely doubling the Sheetrock all around. Have been reading the Rod Gervais book as well.
Cheers,
John
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john
New Member
Posts: 9
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Post by john on May 22, 2016 21:04:51 GMT
Hopefully last question-there's a 5" i beam dropping down below what would be a 7'4"ceiling, I can build a soffit to surround it but it will mess with the symmetry of the room. There's no other way to place it. Is this a fatal flaw that should drive me back to the drawing board?
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Post by Ethan Winer on May 23, 2016 17:10:04 GMT
Small things like beams have no really affect on a room's behavior. With acoustics, what matters most is the big stuff like an entire bare wall or ceiling.
--Ethan
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