Author Topic: Wish to soundproof acoustic music venue and coffee shop from upstairs apartments  (Read 720 times)

chicken_neck

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The building is about 3000 ft sq per floor.  The downstairs will house a coffee shop, co-working space and music venue.  I'm much more concerned about sound going up from music and cafe than sound coming down from voices and footfalls, children, toys, etc.  The building is a 1910 brick over frame with all hardwood floors upstairs (uncovered), 16 inch on center studs and no insulation between floors.  An older type composite tile was installed as the original ceiling downstairs.   It's not all intact due to old leaks and other work.   Later a drop ceiling was installed.  Per code, I can't have a business downstairs without a fire break.  The drop ceiling is about 2 feet below the studs/tile.

My idea is to install Roxul SafeNSound over the tile (where exists) or on the studs for absorption and some fire protection.  Then replace the drop ceiling (already demoed) with a class A fire rated grid and tiles with high STC (70) value on the tiles.

I don't really want to do 2 layers of 5/8 fire retardant sheetrock as the building/plumbing is old, and if I have to go in, it's a big mess.  And the drop ceiling is concealing many pipes for heating, etc.  Plus hanging heavy rock 15 feet up (twice) isn't my idea of fun.

I can't find any way to determine the effectiveness of this method in terms of sound transference. 

Am I off the rails here?

Here are more details:
https://www.zoro.com/armstrong-acoustical-tile-24x48-58-t-pk16-2906/i/G1835601/?gclid=CKnL-ejIxNECFdM8gQodlxYD0Q&gclsrc=aw.ds
Looks like $1.41 ft sq for mold, sag resistant fire rated NRC 0.70 which is pretty excellent. (Have to use food safe for kitchen areas with different specifications.)

https://www.lowes.com/pd/Armstrong-Ceilings-54-Pack-64-sq-ft-Ceiling-Grid-Kit/3631862
Grid kit class A fire rated from lowes about $1/sq.

https://www.amazon.com/CeilingMAX-Black-Surface-Mount-Grid/dp/B004Q09MD6
Surface mount grid kit interesting, but may not work well for our application - need room for Roxul SafenSound or similar sound deadening - may work with MLV...Still issues with many low hanging pipes with this option=more holes in tiles = more labor and sealing with fire caulk.

https://www.insulation4us.com/roxul-afb-acoustic-fire-batt-2-in-x-16-1-4-in-x-48-in.html
Ruxul AFB is .95 NRC at 2”, won’t corrode, easy to install and from above site only $0.40 per square foot (plus $60 shipping up to $600.)

To do all three is about $2.81 per square foot plus labor.  For the front room only, estimating dimensions of 25” deep by 32” wide, or 800 square feet * $2.81 is $2248 before any labor or additional work and materials such as lighting.

It’s possible to skip the Roxul SafeNSound insulation but it’s the cheapest part, it will cut down on sound significantly, and is class A fire rated for additional safety.

chicken_neck

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Oh also I can go much thicker on the Roxul for almost no difference in price for much higher NRC for low frequencies so there's that.  .28 to .86 from 2" to 4" at 125 Hz.  Viable plan anyone?

chicken_neck

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Correction: The Roxul price does go up per square foot (just not per pack, so I didn't see it initially).

Randy S

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Chicken_neck,

This will not work for the music venue, you are looking at NRC ratings which are for absorption not Blocking ratings STC ...

Your idea would do ok for the coffee shop but will do very little for the music especially in the low frequencies.

You need mass and isolation which is what would deliver soundproofing.

Best to give me a call direct and lets discuss options..
I understand the challenge here but you also only want to do this project once.

There is no ceiling grid system in the industry that could deliver STC 70...

Randy S.
760-752-3030
Randy Sieg

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

chicken_neck

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Quite right, Randy, that was an NRC rating on the tile...oops!  Still does a drop ceiling not provide isolation much?  I'll give you a holler.  Thanks!

Randy S

  • Senior Soundproofing Technical Specialist
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    • Super Soundproofing Co
That would depend on how much reduction is needed.

call me can discuss.

Randy S.
760-752-3030
Randy Sieg

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

 

anything