"Andrew Mawson" wrote in message
...

I need to SOUND insulate the box a big (100KVA) generator is in,
and was considering using a wire mesh frame to support normal
rockwool, but then thought of the 'insulation batts' used in new build
cavity walls.

Would these be rigid enough and hold together if just glued on using a
'no more nails' type goo?

Use Warmcell. You can build a frame, mix it, apply it and board up. It also
makes the frame air-tightish. Making something air-tight reduces sound a
hell of a lot.