"Rumble" .@. wrote in message
.. .
Andrew Mawson said the following on 20/11/2005 17:46:
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?

AWEM



AIUI (don't have one handy to inspect closely!) super silent generators
generally have the following features: -

1. The engine compartment is air tight (or very nearly so).

2. The panels for the engine compartment have sound insulation to both
insulate and dampen vibrations in the panels.

3. All the doors and access panels have rubber seals (both to help with
the airtighness and to stop vibrations).

4. An extensively baffled exhaust system.

5. The engine is mounted on rubber shock absorbers (kind of obvious!).

The radiator and air intake obviously have to be outside the airtight
engine compartment.

Don't forget to consider the fire risk of additional insulation.

Insulation doesn't easily catch fire.