Stud wall insulation

[mointainwalker]

Just to say that when they sell this stuff for use inside the house they call it acoustic but it is the same material and the only difference is that they omit the Kraft paper from the roll( that's the vapour-barrier freddy when fitted in lofts !)

 

[MartinNormanton]

Acoustic insulation should always be soft, e.g. Rockwell, so it muffles the sound. Rigid foam like Kingspan etc. are poor sound insulators, though excellent thermal insulators.

 

[ads1]

Thanks for that. I have some mineral wool loft insulation left over which I am going to use. So that should be good for what I want it for.

 

[ajrobb]

Acoustic insulation should always be soft, e.g. Rockwell, so it muffles the sound. Rigid foam like Kingspan etc. are poor sound insulators, though excellent thermal insulators.

Small point (small mind, maybe) but:

Agreed, it mustn't be closed cell (e.g. Kingspan or Cellotex), but acoustic insulation 'could' be rigid. Dense mineral wool (acoustic grade or compressed thermal insulation) absorbs airborne sound energy in its mass. Any other 'heavy' open cell material (rigid or soft) would work.