OK, I know I asked this before but I’ve been researching and tearing my hair (more exactly rubbing my bald spot) over it and getting nowhere fast.
I need to build some kind of largish (maybe 10W, 12D, 10H?) collapsible booth for waterbased finishes.
I’ve seen guys talking about all kinds of “I’m going to build out of…. with a fan of…” or “how about trying…?” but no one who has actually done it and can speak to results.
Anyone out there built such a thing? Construction? Fan size? Filter types?
TIA for any ideas.
Paul
Replies
Paul, I've really done it, for an HVLP system that I sprayed water-based finishes in. It was low-tech but worked great. What I did was, in the corner of my shop I took some 1x3 and wrapped poly sheeting around it a few times then stapled it. I screwed the 1x3 to the ceiling, let the poly drape until it hit the floor and then some, wrapped the poly around another 1x3 at the floor for a weight. At the ceiling I used a short piece of 1x3 with one screw in the center to make a swiveling "lock." When done spraying, I could just roll the whole thing up to the ceiling, turn the "lock" and use that corner of the shop for other things.
Two of those assemblies at right angles to each other in the corner of the shop made a nice 10' x 12' spray booth. For a fan I made a plywood box to fit the window when the bottom sash (double hung) was up. I put furnace filters on both sides of a plain old box fan. Overspray never seemed to affect the fan, and only a little bit of spray made it outdoors. It wasn't airtight, but I kept the shop pretty clean and would vacuum the spray room area before setting up to spray.
I don't have a shop anymore, but that spray booth was very effective and very cheap.
I wouldn't use it for oil-based finishes, and when I sprayed shellac on occasion I would spray outside because of the flammability factor.
Mike Maines
Thanks Mike... I was thinking of something similar but maybe making a frame of PVC pipe. I'm gonna go poke around at HD and try to get some inspiration. Gotta do something soon, weather's turning cold and I'm doing more and more cabinetry.
Paul
If you have access to FWW look at these.http://www.taunton.com/finewoodworking/store/pages/fw_toc_169.asp
http://www.taunton.com/finewoodworking/store/pages/fw_toc_139.asp
Look at this PDF file which you can print out - good stuff on a temp booth.
http://www.taunton.com/finewoodworking/FWNPDF/011139084.pdf
Mike D
"weather's turning cold and I'm doing more and more cabinetry."Take it from an old industrial paint guy, waterborne paints cannot be successfully sprayed at low temperatures for two reasons:
1. The resins will not form a film below some critical temperature, usually something like 50F.
2. Water won't evaporate fast enough to allow application of a nice wet film at spray viscosity that will not sag.If your fan vents to the outside, then you need an equal volume of make-up air from somewhere. In warm weather an open window or door is fine. In cold weather, the make-up air has to be heated somehow or you will be moving cold air over your waterborne paint (see 1 and 2 above).If you vent back into the shop, be sure that your filters are tight enough to take out particulates but open enough to allow enough air flow to carry overspray away from the work.If other activities will be going on at the same time as spraying, you will need filters behind the painter to keep incoming air from carrying airborne contamination onto the work. If a box fan won't generate enough air flow, an 1140 CFM gable-mounted attic fan with shroud can be found for about $80.BruceT
Greatttttttttt...thank you all! That's the kind of info I need. (If I ever get this built it'll be open to any BTer's in my area ;) )
PaulB