Author Topic: Sound absorption between floor joists and furring strips?  (Read 3339 times)

rufunky

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Sound absorption between floor joists and furring strips?
« on: November 02, 2015, 10:11:21 PM »
I'm refinishing my basement and have purchased roxul safe and sound along with 5/8 drywall to be installed over 1x4 furring strips. I am more concerned with airborne sound such as music , voices etc than structure-borne transmission of sound but would still like to do anything that would help with this I am pretty tapped out on the budget so I won't be putting in sound isolation clips and Resilient channel. My guess is that putting a buffer between the points where the furring strips and the floor joists make contact would be better than direct contact. Am I correct in assuming this? If so what would be best? I considered rubber spacers of some sort, rubberized glue, foam tape. Any and all suggestions are welcome and appreciated.

Randy S

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Re: Sound absorption between floor joists and furring strips?
« Reply #1 on: November 03, 2015, 06:37:08 PM »
Use our framing tape.

http://www.supersoundproofingsales.com/SSP-Iso-Tape-Green-1_8-thick-1-7_16-x-100-Roll/productinfo/09-42745-143-1/

apply it to the furring strips.

And you should double up on the drywall if you can afford it.

Randy S.
Randy Sieg

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

rufunky

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Re: Sound absorption between floor joists and furring strips?
« Reply #2 on: November 04, 2015, 12:18:09 AM »
Thank you, would there be any benefit to this over say green glue??

Randy S

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Re: Sound absorption between floor joists and furring strips?
« Reply #3 on: November 04, 2015, 12:22:35 AM »
two different principles.....the tape is what we refer to as minimum decoupling value.

Green glue is a dampening compound.

you can do both and yield even better reduction, but if you could afford green glue then using clips and channel would out perform green glue by far for about the same cost.

Randy S.


Randy Sieg

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

rufunky

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Re: Sound absorption between floor joists and furring strips?
« Reply #4 on: November 04, 2015, 12:29:07 AM »
Thanks so much, I actually haven't priced the green glue.

I was also considering wrapping the duct work in R-6 Insulated Duct Wrap (Has a sticky side for a nice sealed wrap ) leading to the bedroom forced hot air vents to help absorb airborn sound through the ducts. Would this work?

Randy S

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Re: Sound absorption between floor joists and furring strips?
« Reply #5 on: November 04, 2015, 12:45:25 AM »
wrapping the duct with R-6 is a thermal application, when dealing with sound you need to snake the duct to create as many turns as possible. it is the turns that reduce sound.
If you want, you could use Mass loaded vinyl to cap the cavity.


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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