Got a 4x2 CLS stud wall to insulate, board, skim etc. Will use the rockwool acoustic/rwa45 slabs/knauf acoustic slabs. The 100mm size of these will just about manage in the 89mm space, right? While since I’ve done it. I’ll pack out with strips of plasterboard if not.
Rockwool slabs for 4x2 CLS
- Thread starter 23vc
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I don't use much mineral wool, but it is harder to compress than fibreglass. The difficulty will be getting the sheet to behave whilst you get the first couple of screws in. Not easy. I think strips of plasterboard may be essential.
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For acoustic or fire?
Acoustic
There are probably more user friendly acoustic versions out there. We look foe ease of use as well as cost. It gives off very fibrous dust.
Cool, I’ll use whatever people suggest, doesn’t have to be the stuff I mentioned
75mm acoustic or 100mm packed out, there is a significant difference between normal loft insulation and rockwool.
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In an ideal world, you don’t want the rockwool touching the plasterboard.
Also, ideally, double skin the plasterboard with staggered joints. Use filler when the first layer is done, so you have two distinct layers
Also, ideally, double skin the plasterboard with staggered joints. Use filler when the first layer is done, so you have two distinct layers
It shouldn't make a difference really. Extra plasterboard will help though. 2 layers of standard PB will trump a single layer of the acoustic stuff.
At about 40kg each, I don't blame you.
Gyproc plank is another good option, 19mm and easy to handle at 8x2
It is highly unlikely to get Rockwool to compress 11mm in unison whilst trying to individually screw. You will end up with a lot of popped fixings and a piece of plasterboard thrown across the room.
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