Author Topic: Independent stud wall solution - Further Advice Needed  (Read 190 times)

silverob

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Independent stud wall solution - Further Advice Needed
« on: August 17, 2017, 11:09:22 AM »
Hi All,

Done all of my research and about to make the plunge and order all the bits i need, would just like to clarify a few points first here if possible.

Problem - Neighbour noise (LOUD)

My solution -

Independent stud wall

2 x 4 stud frame with 100mm acoustic wool in voids and 2.5 cm void between original wall. Two layers of plasterboard fixed with res bar sandwiching a layer of Tecsound SY70 with both layers of PB sealed at edges with acoustic sealant.

Questions -

Q, Should the frame be attached on all four sides or just the floor and ceiling?

 - Leaning towards all four sides with isolations strips or Tecsound used as an isolation strip, thinking it will be easier to fill frame with AW without the small gaps on sides?

Q, Is it worth the covering the frame in Tecsound?

Q, Is better to have noggins or no noggins will the res bar provide the stability to the frame?

Q, Additionally will the AW perform better if not separated by noggins? As the aloves are both small is it better to have 600 or 400 centres is less wood in the frame better for acoustic performance?

Q, Should i just use two layers of 12.5mm plasterboard or will I achieve better performance with two different thicknesses say 12.5mm and 15mm if so which are the best?

Q, Is it best to go large with plasterboard and have fewer joins as possible?

Q, I will be using Tecsound SY70 membrane between the two sheets of plasterboard, does this just cover the plasterboard or go the wall, ceiling and floor? A lot manufacturers guidance states overlapping edges but cannot see it practical in this instance?

Materials -

2 x 4 stud frame
Rockwool Soundslab 100mm
Tecsound SY70
British Gypsum Gyproc Soundbloc 12.5mm Tapered Edge Plasterboard 2700mm x 1200mm
AC50 Acoustic sealant
Jointing Tape

Any advice would be greatly appreciated, pretty much there just need some answers i can not seem to find online decisively.

Thanks

Robert

Randy S

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Re: Independent stud wall solution - Further Advice Needed
« Reply #1 on: August 17, 2017, 04:08:13 PM »
Robert,

Here are the answers to your questions.

Questions -

Q, Should the frame be attached on all four sides or just the floor and ceiling? all 4 sides due to weight load

 - Leaning towards all four sides with isolations strips or Tecsound used as an isolation strip, thinking it will be easier to fill frame with AW without the small gaps on sides?agreed

Q, Is it worth the covering the frame in Tecsound?not if your floating on resilient channel

Q, Is better to have noggins or no noggins will the res bar provide the stability to the frame? I am not familiar with the term "noggins" but since you are loading 2 layers with RC1 you should use vibration pads every 2' on the floor to help support the weight and maintain the 1/4" gap required around the perimeter when floating a wall..you do not want it sagging over time.

Q, Additionally will the AW perform better if not separated by noggins? As the aloves are both small is it better to have 600 or 400 centres is less wood in the frame better for acoustic performance?I am again unsure of the question here, but if you are referring to 16" vs. 24" stud spacing , go with 24" it is better.

Q, Should i just use two layers of 12.5mm plasterboard or will I achieve better performance with two different thicknesses say 12.5mm and 15mm if so which are the best? the more weight the better the reduction

Q, Is it best to go large with plasterboard and have fewer joins as possible?yes and offset the seams of each layer

Q, I will be using Tecsound SY70 membrane between the two sheets of plasterboard, does this just cover the plasterboard or go the wall, ceiling and floor? A lot manufacturers guidance states overlapping edges but cannot see it practical in this instance?cover the entire wall and butt joint on studs if possible hanging the material vertically

make sure you leave a 1/4" around the perimeter of each layer of plasterboard and fill with acoustic caulk, you do not leave a perimeter gap for the tecsound sy70.

hope this helps you out.

Randy S.
Randy Sieg

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

silverob

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Re: Independent stud wall solution - Further Advice Needed
« Reply #2 on: August 17, 2017, 06:22:28 PM »
Thanks Randy much appreciated.

The noggin is the horizontal brace for the studwork, wasn't sure if the res bar would give the frame enough strength on its own.

Haven't heard of vibration pads thinking I could use isolation strip cut to the right size and layered up haven't seen that product for sale here.

Thanks again

Rob

Randy S

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Re: Independent stud wall solution - Further Advice Needed
« Reply #3 on: August 17, 2017, 08:13:40 PM »
ok !! Noggin (wall frame blocking and/ or fire blocking) yes you should put at least a row in.

that should work for the bottom of the wall, recess it back a bit from the face of the wall and caulk the face.

randy S.
Randy Sieg

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