OK - house purchase has fallen through - turns out there were too many illegalities with the proposed purchase so to keep my sanity I'm reverting to finishing a project started a while bask: quietening my generator.
It's a 6 litre turbo charged diesel in a steel box with virtually no internal sound absorbing material - currently I've lifted off the box (2.6m x 1.5m x 1m) to do a bit of welding on rusty bits, and intend to line it before I crane it back on. Currently giving 90dBA @ 1 metre target is to reduce it to 70dBAor so.
Hunting around there seems to be a shortage of suitable materials at a reasonable price. I'm looking for a sandwich construction accoustic foam laminated with either lead foil or other dense material giving at least 32mm thick overall, preferably 45mm. Best so far seems to be
So if anyone has about 14 sq metres of suitable fireproof, oil proof, rot proof and sound absorbing foam to hand or knows a better source please get in touch.
Regards,
Andrew