Author Topic: Concrete slab ceiling  (Read 3823 times)

Fred SP

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Concrete slab ceiling
« on: November 04, 2010, 06:38:42 PM »
We are in a live/work with 18 foot ceiling that is concrete poured in channel steel (I don't know what it is properly named) with cinder block walls. The noise from contact with the ceiling/floor seems almost as if it's amplified by the slab. Noise generated by sources that are not in contact with the floor above (our ceiling) don't seem to be as much of an issue however the dog that barks and howls downstairs is a problem - but one problem at a time!

The channels in the steel the slab are poured into are 9 inches deep, 17 inches across the top of the channel and 21 inches across the bottom. Photos of the ceiling can be seen here: http://www.fredfraser.com/grab_bag/ceiling.jpg. How do I deal with this?

Randy S

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Re: Concrete slab ceiling
« Reply #1 on: November 05, 2010, 05:00:47 PM »
So is your concern with sound transmission(airborne/impact) through the ceiling or is it the echo and reverb from within the room?
Randy Sieg

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cybertron

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Re: Concrete slab ceiling
« Reply #2 on: January 12, 2011, 07:59:33 AM »
It seems the OP has abandonded this question, but since I have the very same loft style condo that I'd like to get sound worked out I'll just piggy back on here.

I'm mostly concerned with sound reflection, but penetration to the hallway and neighbor is of concern too. If I do anything about the neighboring sound, it would be to simply put up a second wall in front of my current wall. So frame in against the sheet rock, and use better material. I had read somewhere that you should remove the old sheet rock and then frame, but having that additional sheet rock seems like it would help.


Randy S

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Re: Concrete slab ceiling
« Reply #3 on: January 12, 2011, 05:16:11 PM »
A new wall is the best approach but DO NOT create the triple leaf system...remove the old drywall and give a space between new wall and old wall atleast 1/2"

For the echo / reflection you need to add soft surfaces/absorption materials in order to reduce this problem. you will need to cover at least 30% surface area in order to see a reduction.

You can contact me directly if need be.

Randy S.
760-752-3030 ext 104
Randy Sieg

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