Originally Posted by Larry M
Mike: Good post. You described Hobo's engine room. How long did the project take and were there any Oh shits along the way?
if I had an engineroom overhead that looked as pretty as yours, I would have thought twice about disturbing it. The easy bits were the removable pannels because I could take them back to my workshop, turn them upsidedown and work on them in comfort. The permanent bits were a real PITA because of the limited space between top of engines/generator/other stuff and the underside of the "ceiling". I filled up the cavity with layers of a heavy fire-resistant foam and spray-on contact adhesive. Use small pieces - I couldn't support a big sheet and get it to stick in the right location. The last layer was an equivalent to Soundown. I didn't like the "pins and washers" approach and I couldn't stick big sheets in place for the the reason stated. I decided to hold them with pannels of 3/16" plywood screwed in place and painted light grey. It may reflect some of the sound back down again, but it's a big improvement and anyway I have a wipe-clean engineroom ceiling! I would guess the whole thing took the best part of a week to do.
Originally Posted by Rduval
How were the tiles and styrofoam held in place? Did you just pry them out? Did they come out cleanly?
The fiber tiles were originally fixed in place with little mild-steel (rusty) finishing nails and in places glued to the styrofoam above. The PO has used fender washers and wood screws to hold up some of the sagging edges. The styrofoam was glued to the overhead with the Taiwanese equivalent of Evo-Stik; the fiber tiles were glued to the styrofoam with the same stuff. Being a tad anal it felt really good to get all that garbage out of there. Edit: No, it didn't come out cleanly. This is messier than demolishing old drywall.
If you are thinking of doing this:
Cover engines and everything else with drop-cloths.
Have a good shop-vac, clean up as you go.
Have good ventillation and lighting.
Face/dust mask and eye protection
Set a target of a small area for the day's work - don't try to do it all at once.
This job is a breeze if you are a double jointed dwarf with eyes in the back of your head!