I hate sound boxes around generators as they hide all kinds of minor problems that can become expensive repairs
if not discovered.
So now that we are ashore for a year, I am taking the opportunity to make the whole ER the sound box and to clean up and label the wiring
What I discovered when I removed the original 2 ˝” Rockwool behind 3/8 dense fiber pegboard is that the hull
shell and frames are in great shape. Corten steel, Dutch built schooner (1984)
The Ceiling just had some cheap
stick on rock wool whose silver lining had turned to powder.
Biggest surprise was that the integral Diesel
tank tops which forms the forward ER Bulkhead, have about a 4” gap with no barrier insulation
, so that would is the biggest noise generator
into the accommodation.
Also a few bulkhead penetrations for piping, had no noise
baffles, so that is an easy fix.
If you look at my sketch my new Insulation Plan is to :
- Stay with the Fiberglass Rockwool and original pegboard on hull sides (Orange 0.9m)
- Ceiling, (Red) ,Side Deck Top and Inboard (Purple) as well as Aft ER Bulkhead, switch to a 2” 2lb composite barrier Vinyl /foam switching to the Quiet Tech Aloy pegboard.
Undecided how to re-do the Fwd ER Bulkhead. It is an Integral tank, built into the hull… I don't know what is needed for noise purposes on the ER tank side, since there is 2,400 liters of fuels behind it?
Should I just replace with loose Fiberglass
, to make it easier to remove, or go with the same 2” 2lb composite barrier Vinyl /foam?
I will dam and fill up the void space above tank top with barrier insulation and Rockwool…. But what about the vertical face of the tanks
Does it need a noise barrier?? ….Or just an absorber like rockwool and pegboard?
Any thoughts or suggestions are appreciated.