Author Topic: Options for a Low Ceiling  (Read 2637 times)

ditherings

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Options for a Low Ceiling
« on: September 16, 2015, 06:18:26 AM »
I would like to soundproof some party walls and ceilings in my apartment. 1970s building with brick walls and concrete slab ceilings. Currently all walls and ceilings are rendered with some kind of plaster mix - no drywall in use and no insulation anywhere or cavities I can access.

 I have been advised best course of action for all areas is to create a gap before adding additional layers of insulation, dry wall, dampening products etc. This is somewhat feasible for walls (though not cheap) but not ideal for the standard ceilings (around 8 feet). I'd rather not shave off 7-10cm in what is not a particularly large apartment.

From the upstairs I get lots of impact noise but we also hear talking when they have people over and their music/radio. I understand that impact noise is much harder to tackle, but is there anything that might lesson it somewhat and cut out airborne noise (conversations late into night) that won't take up a heap of room? Would 2 layers of dry wall with Green Glue between screwed directly to ceiling make any difference?

I understand what I get impact noise but am less clear on why music and conversation is carrying through a concrete floor/ceiling. They have carpets in bedroom and lounge and tile in rest of the area, impact noise we get is footsteps, doors, cupboards and drawers opening and closing. 

Randy S

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Re: Options for a Low Ceiling
« Reply #1 on: September 16, 2015, 03:29:48 PM »
I need some more information on the complete floor / ceiling assembly..
Is it just 4" or 6" concrete exposed with tile on their floor???

At 4" thick concrete you should be around 44 STC
at 6" thick concrete you should be around 55 STC

at those values human speech should not be heard. Now radio and TV if on the floor could send sound into the slab therefore it would be heard.

There is a lower profile approach that is a far lessor value of reduction but you would only lose 1 3/4" from the ceiling complete with 2 layers of 5/8" sheet rock.

Randy S.

Randy Sieg

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Ph. 760-752-3030
Fax.760-752-3040

ditherings

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Re: Options for a Low Ceiling
« Reply #2 on: September 17, 2015, 06:57:41 AM »
Thanks Randy. I am not sure how thick the slab is, but their floor is my ceiling. In bedrooms and hallways they have carpet (though it is a rental and I don't think the landlord has spent much time or money putting in good quality carpet and maintaining it.)

I think in the kitchen and wet areas it is just tile laid on the slab with no dampening treatments as far as I know. We get all the vibrations and bangs from their front and internal doors, cupboards and opening and closing doors and some foot impact.

We can't hear our neighbours all the time so I assume normal speech is blocked. However anything above normal speech (talking after a few drinks, groups (even small groups) of people over talking and laughing loudly) is audible, as well as their stereo, which as far as I know is just a small set up with built in speakers on a table. I am wondering whether the airborne noise is more likely coming in from windows, or perhaps air vents in the brick? With a concrete ceiling it doesn't *seem* like I should hear them talking and yet I frequently can.

Randy S

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Re: Options for a Low Ceiling
« Reply #3 on: September 21, 2015, 03:21:07 PM »
well certain things you will not be able to address on the receiving side with out going crazy on soundproofing.
Doors slamming and cupboards closing normally are dealt with at source by using foam or rubber bumpers.

And to be honest by using a low profile system of resilient channel and sheet rock the reduction will be minimum.

I would get with the landlord and see what he is willing to contribute for his rental unit....

Randy S.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

 

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