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spraybooth1 Toy Inventors Notebook: Stairwell Spray Booth

When I was setting up my new garage shop, I was wondering what to do with the triangular space underneath a flight of stairs. The odd shape didn’t lend itself to efficient storage, so what else would be good? I was tired of makeshift spray painting and had outgrown my desktop mini spray booth, so this upgrade was timely.

I measured the space and assembled a frame using 2x4s and wood screws. Its slanted top fits the stairwell space snugly so everything else is mounted inboard. The panels are 1/8″ tempered hardboard screwed to the frame. The back panel is 3/4″ plywood with a hole cut out to accept a bathroom ceiling fan. I vented the fan to an outside wall with a flexible clothes dryer hose and vent. There are two stages of filtration: I staple an inexpensive paper furnace filter over a sheet of fine filter paper (and just tear them both off and replace when they’re loaded with paint). Clamp-on spots provide plenty of light and a little bit of heat for drying paint. The lights and fan plug into a switchable power strip for instant on/off action.

This rig has worked out great for painting, adding filler putty, spray mounting, or any other stinky project. It’s tucked out of the way and offers plenty of storage on the shelf and underneath, too. What’s under your stairway?

Well-used stairwell spray booth!  With adjustable lighting, big work area, back vented fan and lots of storage underneath.

Well-used stairwell spray booth! With adjustable lighting, big work area, back vented fan and lots of storage underneath.

Back panel with bathroom ceiling fan. All panel corner joints caulked to be paint proof.

Back panel with bathroom ceiling fan. All panel corner joints caulked to be paint proof.

Staple afine filter paper over fan…

Staple afine filter paper over fan…

...thenstaple a disposable furnace filter over the paper (it’s wide enough to use twice  by repositioning sideways) When full of paint tear and and replace paper and filter.

…thenstaple a disposable furnace filter over the paper (it’s wide enough to use twice by repositioning sideways) When full of paint tear and and replace paper and filter.

Fan vents out the back and thru aside wall to an outside dryer vent.

Fan vents out the back and thru aside wall to an outside dryer vent.

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Bob Knetzger

Bob Knetzger

Bob Knetzger ([email protected]) is an inventor/designer with 30 years of experience making fun stuff.


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