Super Soundproofing Community Forum

Soundproofing Forum Topics => Acoustical Questions? Ask here about Sound absorbsion, Reflection, ETC => Topic started by: tomagardner on August 30, 2011, 09:11:04 PM

Title: ceiling soundproofing
Post by: tomagardner on August 30, 2011, 09:11:04 PM
Hi!
We are redoing the basement and want to soundproof the ceiling.  I have read about resilient clips and double 5/8" drywall with GG in between.  They also recommend R19 between the studs above the lowered ceiling. 

Would something like 705 rigid fiberglass provide more base absorption?

The walls of the basement will be all double brick on concrete.  I wouldn't think that any isolation between the walls and the brick would be needed?   We'll keep the walls from touching the lowered ceiling.

TIA, Tom
Title: Re: ceiling soundproofing
Post by: Randy S on August 31, 2011, 07:44:32 PM
No the 705 rigid fiberglass will not improve the bass absorption, you should use cotton fiber insulation.
http://shop3.mailordercentral.com/supersoundproofing/products.asp?dept=24

and you should use a layer of MLV stapled to the bottom of the joist and sealed before the clips and channel go up.
http://shop3.mailordercentral.com/supersoundproofing/products.asp?dept=28

this is how you control the cavity.
Title: Re: ceiling soundproofing
Post by: Londoner on October 10, 2011, 11:55:08 AM
I've had a nightmare with squeaky floorboards from the flat above - just enough noise to wake me when they go to bed late and again, in the morning when they wake up ridiculously early for shift work.

I'm looking at a soundproofing the ceiling and Green Glue would be the easiest solution it seems. I have bay windows that go to the ceiling so need to not lose much height. However, does it really work? I hear it's good for airborne noise but what about impact and the 'squeaks'?

I don't need anything like 100% reduction, I think 50 to 70% would do fine. The alternative is Acoustic Hangers (http://www.soundstop.co.uk/solutions/ceiling_access/ceiling_solution_2.php) solution. I can't seem to get a definitive answer as to whether this would be more effective or not. The last thing I want to do is to have to do it all over again if one or other is not effective enough.

Any help greatly appreciated.
Title: Re: ceiling soundproofing
Post by: Randy S on October 10, 2011, 04:41:32 PM
Your post is answered here:
http://supersoundproofing.com/forum/index.php/topic,3305.0.html