| The Craftmans Shop > New from Old |
| Trying to Quieten the 110KVA Generator |
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| awemawson:
Yes I'm hoping so Tom! I've now got sixteen slabs fixed to that long partition wall, so it is pretty well covered - just four to go at the far end. I've just done a very quick 'start it and turn it off' test (before anyone notices :clap:) and the noise in the generator enclosure has dropped from 107 dBA to 103 dba Tomorrow I hope to complete that wall and the end wall near the PVC strip curtain. I've just ordered a bolt of heavy duty waxed cotton canvas to make the air duct from the radiator to the outside world - this will be about 2 metres long and a metre by 1.5 metres square. Hopefully this will absorb some of the sound of the emerging fan driven air which can then be prevented from re-circulating back round the radiator as it does at the moment. Downside is I need to open negotiations to use the sewing machine as the canvas is 60" (1.5 metres) and I need 2.8 metres to wrap round the radiator cowl :clap: |
| nrml:
I'm surprised you don't have an industrial sewing machine tucked away in one of your workshops waiting for it's moment to emerge and shine. The insulation job is looking good. :thumbup: |
| awemawson:
Well I did years ago! I do have a light duty one sold to me as industrial but it isn’t, they lied ! (Back in my youth I had a holiday job in a haberdashers on the Fulham Road in Chelsea. (Tulleys) They had a side line making rather rectangular sofas and I was involved at all stages from making the wooden frames, upholstering them and making their covers. So when I left home at the tender age of 17 and went to live in Southampton and needed a sofa for my flat, I made one. From that it grew into me making one or two a month, and I got registered as a manufacturing upholsterer ! Even had an exhibition at the Southampton Show one year ! Still got my magnetic tack hammer and staple gun from those days) |
| awemawson:
Cracking on today I got the north wall covered in acoustic insulation apart from where it abuts the west wall, and I got the south wall insulated over the wooden cladding, again leaving a gap next to the west wall. The east wall is finished so I am left with the lower (masonry) half of the south wall and the west wall to complete. The west wall is where the radiator air leaves the enclosure, and I need to bend up the cowl arrangement and insert it through the wall before fitting the sound insulation. I also want to sound insulate the ceiling - probably using wire mesh of some form with the Rockwool resting on it - I have two unevenly spaced rafters to fix it to so it needs to be stiff enough to carry it's weight and that of the Rockwool over a cantilever of 600 mm and a 'both ends supported' span of a metre. 50 mm mesh with 2.5 mm wire is looking like the best candidate at the moment but £12 a sheet and 6 sheets takes the shine off it. If I could get over the cantilever somehow I'd use 1/2" mesh chicken wire but by the time I've messed around with batten etc I think probably I'll go for the simpler solution of stout mesh! |
| russ57:
I would think, guessing a bit about the rockwool stiffness, that a mesh of even 150x would be fine, more like concrete reo than a mesh fabric. I guess you wouldn't get it in galvanised, but a coat of spray paint would fix that as well as seal the rockwool preventing fibre shedding. -russ |
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