Author Topic: Floor/ceiling soundproofing  (Read 2065 times)

ARC111

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Floor/ceiling soundproofing
« on: November 02, 2015, 12:42:22 PM »
Hi,
I have a large cabin that has two bedrooms above the living room.  The construction is heavy timber  exposed beams in the ceiling (4" X 12" beams) with 1.5" tongue and groove floor on the second level.  The second floor bedrooms have thick padding and carpeting, but the noise from the living room below is too loud in the bedrooms.

I want to leave the beautiful beams exposed as much as possible, and the tongue and groove flooring above the beams (also exposed) looks great....but I think it will have to be covered with some type of acoustic barrier and then a decorative wooden finish (tongue and groove planks of some sort?) to maintain the timber look.

Does anyone have a recommendation for this particular situation?  I have heard of high-end sound-proof carpet underlayment, but I hate to spend the $$ there and not remedy the problem.  Most of the underlayments are limited to 3/8" thick, and that just doesn't seem enough.

The other option is to install sound type of soundproofing beneath the tongue and groove flooring  between the 4"X12" beams (16" oc); and then to install a decorative wood cover beneath the soundproofing material.  It would be great if there were a soundproofing material that had a nice design embossed into the material (high end, deeply embossed design, not cheap looking). 

Any suggestions appreciated, I need to resolve this issue asap.

ARC

Randy S

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Re: Floor/ceiling soundproofing
« Reply #1 on: November 03, 2015, 06:41:07 PM »
Ok you can do 2 things here.

1) glue 1/2" cement board in between the joists and screw to secure while glue is drying.
2) use the MLV w/ closed cell foam underlayment.
http://www.supersoundproofingsales.com/Mass-Loaded-Vinyl-48W-w_Closed-Cell-30-Roll/productinfo/09-00005CC-54R/

Followed by #8 density Rebond carpet pad.

This will deliver reductions in airborne and impact noise issues. Understanding that since the ceiling is an open system you will NOT see maximum value unless the cavity is insulated and the ceiling is clip and channeled with a hard lid.

Randy S.
Randy Sieg

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

ARC111

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Re: Floor/ceiling soundproofing
« Reply #2 on: November 08, 2015, 01:21:41 PM »
Randy, thank you so much for your suggestions.  I agree with you, but someone else suggested to leave a 3" air gap, install 2" foam board insulation and then 2X6 pine tongue and groove planks.  He thinks that this will stop most of the airborne noise in the first floor from reaching the upstairs bedrooms.  I've attached a diagram showing the other suggestion.

Randy S

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Re: Floor/ceiling soundproofing
« Reply #3 on: November 09, 2015, 04:24:22 PM »
Well with the 2x6 pine planks you could be doubling the weight of the ceiling and would deliver a reduction. make sure you seal it up like a fish tank.

As long as you are following mass law you will get a cost effective value.

Mass Law states that in order to achieve a 5-6 db loss you must double the weight, density or frequency.

This is why I choose 1/2" cement board @ 3 lbs per sqft. in combination of the mass loaded vinyl in a limpid state on top of the floor. your adding 4.25 lbs per sqft. not counting what is currently there.
or you can do both methods, their design below and move the cement board on top of the floor before final flooring goes down.

Either way we understand that you will not achieve maximum value because of the open ceiling below.

Please check back and let us know what system you choose to go with and how much reduction you achieved.

Randy S.


Randy Sieg

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

ARC111

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Re: Floor/ceiling soundproofing
« Reply #4 on: November 10, 2015, 10:53:07 PM »
Thanks again for your advice.  We plan to begin work on this project within the next 30 days.  I'll be sure to post back with type of install and results.

ARC