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anuvanoob 06-01-2013 04:17 PM

would sound deadening the ceiling help much?
I have a small unfinished basement room (8' x 11') that sits below a first floor bedroom. I already drywalled the walls and about to the ceiling. I just realized I'll most likely be playing music relatively loud in this basement room. I figure I'll pick up some insulation for the ceiling joist and sound deadening material for between the drywall and ceiling joist. Will this help much in preventing noise from disturbing the first floor bedroom?

Msradell 06-01-2013 09:34 PM

It certainly will help. Depending on how quiet you need it emails need to install acoustical material to the bottom of the sheetrock to absorb the sound.

anuvanoob 06-01-2013 09:40 PM

Huh? Put the deadening material between the drywall and the living space?

ddawg16 06-02-2013 03:34 AM

The sound deadening needs to go on the inside (room side) of the drywall. Basically, your drywall will 'somewhat' resonate with the sound your playing and transmit that into the cavity between the basement and bedroom.

You need acoustical foam on the underside of the ceiling drywall if you really want to deaden the sound.

wkearney99 06-02-2013 05:58 AM

If you want to deaden the sound you need to de-couple the drywall from the framing. Insulation will help deaden mid-range sound but will do next to nothing to attenuate low frequency bass sounds.

There are clips and channel that are sold to do this. The idea is the clips are attached to the framing, then metal channels are hung from that and the drywall screws into them. For added isolation you can put up two layers of drywall and use a compound called "Green Glue" between them. It acts as an absorber of the sounds.

Here is an excellent website that discusses this and sells products for it:

Windows on Wash 06-02-2013 11:45 AM


Uncouple the framing and fill the voids.

To what extent you want it to be soundproof will determine how far you will have to go with both of those concepts.

wkearney99 06-02-2013 12:00 PM

To add, we're building a new house and given how budgets and appraisals go, we're not putting in the isolated drywall setup until next year. Instead we're just putting up the 1/2" drywall and have insulating batts in the cavities. We'll either pull that all down or just put the channels and new sheets over it. Why? Because spending an added $10k to properly soundproof it wouldn't be positively reflected in the appraisal. That and we've got plenty of other places where that money will get spent first. If we left it unfinished it'd negatively affect the appraisal. Instead there's a $700 drywall job that'll probably get trashed the winter after next.

ddawg16 06-02-2013 12:12 PM

I concur with the decoupling....but it's also the hardest to do....

One option....suspended ceiling....

wkearney99 06-02-2013 12:33 PM

It's not all that hard to do if you're dealing with bare framing. Just buy the clips and channel and screw drywall to it like it was just framing.

anuvanoob 06-02-2013 05:27 PM

Using clips & channels, Green Glue, twice as much drywall or suspended ceilings is not an option unfortunately; they would recover additional inches of space and the ceiling height is short as is (it's 6' 6"... I'm 6' 3")

The sound deadening material I had in mind is cork board since it's thin coupled with insulation. Is there a better solution given the lack of head room?

wkearney99 06-02-2013 05:46 PM

Yeah, lack of available height is a hassle. Just know that unless you decouple from the framing you're not going to do much to soundproof the space against anything other than mid-range voice sounds.

If this is a room under a bedroom and you're hoping to play later then you're going to be S.O.L.

Take a look at this article:

Given the limited height I'd look at doing something like using two layers of drywall with the green glue in-between. Even two layers of 1/2" with the glue in-between would be better than nothing. There you'd at least be getting additional mass AND a layer of decoupling.

I would not try to reinvent the wheel here with something else. Especially if it's not specifically rated as a ceiling material. There are fire issues to consider too.

A single layer of something is going to suffer from the fasteners used to attach it, and it's direct connection to the framing, as means to transfer noise. Bass follows hard paths and unless you break those paths you will not dampen the noise.

I take it you're not getting this project permitted or inspected? Few places would allow for a ceiling that low.

anuvanoob 06-02-2013 05:59 PM

Nope, not getting permits or inspected. This a temporary office for me until we dig out the basement to give me more head room. Just curious, what is the minimum required ceiling height for a basement?

anuvanoob 06-02-2013 08:52 PM

Also, the first floor room is about 4 feet wider than the basement room and the walls in the basement room (already drywalled) aren't insulated... will installing insulation in just the ceiling joists that cover the basement room be good enough or do I need to install insulation in the ceiling joists until it covers the the area of the first floor room?

wkearney99 06-02-2013 09:10 PM

Have you already looked into what underpinning will be required to dig out the basement? That and how it will require losing a foot or so along the insides of the walls?

Define "good enough".

No, it probably will not be good enough to make it quiet enough for someone upstairs not to hear the music. It certainly won't help contain ANY bass sounds. And you put up interior drywall without insulating in it? Did you at least put up a vapor barrier? But to answer your question, no you wouldn't have to treat the areas not over the basement space. You'd have to insulate the walls of the basement space though. The idea is keep the noise contained IN the room.

Did you read the soundproofing website pages? They really do cover a lot of this sort of thing. There's a ton of really easy to understand explanations on there. Well worth the time to read through them.

anuvanoob 06-10-2013 12:18 PM

Yes, I read them. Keep in mind this isn't a serious, do it right project - I just need something cheap and quick for right now to tide me over, even if the results are not all that great. This room will be gone whenever we finally get around to digging out the basement and level the house in a year or two

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