Falesh Posted February 21, 2020 Share Posted February 21, 2020 I am researching how to soundproof two rooms that share a wall. One method is using a double stud wall as seen here. The other would be using an ICF party wall and then using clips to decouple the drywall, as shown here. In the links the double stud is preferable as the single one is also using a stud wall. But I am wondering how well a thick ICF wall would work due to its very large mass and great airtightness. Anyone have any ideas? Link to comment Share on other sites More sharing options...
Russell griffiths Posted February 21, 2020 Share Posted February 21, 2020 What are you building the rest of the place from, or what is existing icf would seem a bit strange just to build a dividing wall if the rest of the place is timberframe, and visa versa. Link to comment Share on other sites More sharing options...
Falesh Posted February 21, 2020 Author Share Posted February 21, 2020 I haven't decided that yet, the answer to this might be another thing that helps me decide one way or another. Link to comment Share on other sites More sharing options...
Jeremy Harris Posted February 21, 2020 Share Posted February 21, 2020 Our external walls are a different form of twin stud construction, but seem to be extremely effective at attenuating sound. This is a section though the wall: The ~300mm wide void between the skins is filled with dense pressure-blown cellulose, and is pretty heavy and solid. The construction is inherently very airtight, as is has been designed to be the external walls for a passive house. It should be pretty easy to substitute this type of wall for a standard stud wall, albeit with a fair increase in wall thickness. Link to comment Share on other sites More sharing options...
Mr Punter Posted February 21, 2020 Share Posted February 21, 2020 I have had some fantastic sound test results on timber frame party walls. Even the standard Robust Detail gives fairly good results. Link to comment Share on other sites More sharing options...
Moonshine Posted February 21, 2020 Share Posted February 21, 2020 11 minutes ago, Mr Punter said: I have had some fantastic sound test results on timber frame party walls. Even the standard Robust Detail gives fairly good results. They should do, if they are built right they should exceed Dntw + ctr 50 dB easily. Link to comment Share on other sites More sharing options...
Moonshine Posted February 21, 2020 Share Posted February 21, 2020 55 minutes ago, Falesh said: I am researching how to soundproof two rooms that share a wall. One method is using a double stud wall as seen here. The other would be using an ICF party wall and then using clips to decouple the drywall, as shown here. In the links the double stud is preferable as the single one is also using a stud wall. But I am wondering how well a thick ICF wall would work due to its very large mass and great airtightness. Anyone have any ideas? One potential issue with timber is comparable to masonry you don't get the low frequency performance you do with masonry as timber doesn't have the mass. You could go for a hybrid construction, 100mm dense block, which you could use a structural wall. The have a independent 100mm stud wall, with 50-100mm gap from the block, fill all the cavity with insulation, and finish with 2 layers of soundbloc. You will also need to think about flanking noise via loft if one of the wall leaves doesn't go up to roof level Link to comment Share on other sites More sharing options...
Falesh Posted February 21, 2020 Author Share Posted February 21, 2020 1 minute ago, Moonshine said: You will also need to think about flanking noise via loft if one of the wall leaves doesn't go up to roof level Yeah, on that same site it shows a possible option for that. I never even thought about simply having the wall go all the way to the roof. If both work then I guess it's down to whichever is the cheapest. 5 minutes ago, Moonshine said: One potential issue with timber is comparable to masonry you don't get the low frequency performance you do with masonry as timber doesn't have the mass. You could go for a hybrid construction, 100mm dense block, which you could use a structural wall. The have a independent 100mm stud wall, with 50-100mm gap from the block, fill all the cavity with insulation, and finish with 2 layers of soundbloc. I would like low frequency protection too, which is what drew my thoughts to the ICF. The other is that with the ICF it's a simple single wall rather then having to build multiple ones with gaps inbetween. Having said that since I have, as yet, not found data to compare the different solutions it may or may not work. Link to comment Share on other sites More sharing options...
nod Posted February 21, 2020 Share Posted February 21, 2020 1 hour ago, Falesh said: I am researching how to soundproof two rooms that share a wall. One method is using a double stud wall as seen here. The other would be using an ICF party wall and then using clips to decouple the drywall, as shown here. In the links the double stud is preferable as the single one is also using a stud wall. But I am wondering how well a thick ICF wall would work due to its very large mass and great airtightness. Anyone have any ideas? This is what I do for a living A double MF wall will out perform a solid built wall for sound and air tightness I’m just pricing some factory units that have a set of offices in the middle that won’t want to listen to machinery all day Similar to the one shown but with Gypsum slabs clipped to the back of each stud Link to comment Share on other sites More sharing options...
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