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Thread: Need ideas for a cheap spray booth

  1. #1
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    Need ideas for a cheap spray booth

    In my last house I made a spray booth contraption of our 2x4ís and that would hang off the open garage door. It worked okay, but was far from smooth.

    Iíve moved and have a need to spray a 8í x 2í desktop, which is probably about the biggest project Iíll spray. So Iím looking for a cheap and easy spray booth setup and need some ideas.

    Currently my thought would be to buy a pop up canopy (easy up style) and add poly walls to it with Velcro/clamps/something else.

    Any other thoughts? I thought about a big camping tent, thinking the mesh walls would block debris but not all of the wind.

  2. #2
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    I just finished spraying my second batch of Plantation Shutters.

    My first batch, I built a temporary spray booth out of 2x4's and covered it with a heavy duty plastic.

    This second time, I built the structure out of 2" PVC pipe and just used Tee and Elbows. In a few places I used PVC adhesive, but left it to the point where I could disassemble it and store it for future use. This one, I covered with a lighter weight plastic drop cloth, covering the 4 walls, ceiling and floor.

    I made it 10'L x 8'W x 7'H.

  3. #3
    Why bother with a spray booth? A clean room will do just fine. Spray your finish, let it flash off then vent with a fan. Plenty of finishes get sprayed on site without a booth.

  4. #4
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    Quote Originally Posted by johnny means View Post
    Why bother with a spray booth? A clean room will do just fine. Spray your finish, let it flash off then vent with a fan. Plenty of finishes get sprayed on site without a booth.
    Iíve got a basement shop with only one small half window. Spray in there would kick up too much dust. Garage, basically the same thing, and outside too much wind and too seasonal. I donít mind spraying in winter in the garage because I can keep things inside them bring out to spray and back in soon. So, no clean room available.

  5. #5
    Looked into this a little a while ago. For not much more than just a pop up canopy, you can get one with three sides enclosed, so you wouldn't have to fuss with separate poly. My thought was I'd add a fan or two in the back wall with filters in front to get enough air flow to minimize overspray settling on the work. I haven't had to do it yet as the weather has been nice enough that I spray outside, but when winter comes I may need to take the plunge.
    --Certainty is the refuge of a small mind--

  6. #6
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    I use poly hung from nails in the floor joists to make a temporary spray booth in my basement shop. My DC fan is the exhaust and an open window supplies make-up air. I've used this arrangement for about 8 years now and it works really well for the shellac and waterborne products I use. No way I'd spray solvent based products, however, besides shellac. The booth is about 8 x 10 ft so I can spray house doors lying flat, and similar large projects. 1200 cfm is not nearly enough, but somehow it is as I've never had a problem with overspray.

    John

  7. #7
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    Modesto, CA, USA
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    I picked up a free dome tent with no poles at a yard sale. staked the corners down and tied the top to a tree branch. I reached in through the open door and used it for a sandblast booth.
    Bill D

  8. #8
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    From an idea in a spray-finishing book,
    Mine is a knock-down spray booth of 1-inch foam insulation panels connected together with Velcro straps. Mine is 8 feet wide (two panels) and 4 feet deep with a top -- easily extendable -- not quite 8 feet high to fit in my garage. I took a 36-inch belt-drive "whole house fan", and reconstructed it into a round duct of flashing with the motor outside of the duct and the belt through a slot in the suction side of the fan. It is very easy to assemble, and it disassembles into a 5-inch thick stack, except for the ducted fan.

  9. #9
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    Last edited by glenn bradley; 09-05-2020 at 6:26 PM.
    "The Danish government believes that if we train 5,000 designers, and produce
    one Hans Wegner, the money is very well spent." - Ole Gjerlov-Knudsen

  10. #10
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    Wayland, MA
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    rigid foam insulation and duct tape; whole house ventilation fan aiming out a window in the back. Not good for flammable solvents obviously, but keeps the overspray off everything in the shop and vents the fumes pretty effectively. I still use a respirator. (Actually much like Glenn's picture that I just looked at more carefully)

  11. #11
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    I recall seeing plans with rigid foam board. Iíll look into it more. Definitely cheaper than a pop up tent. More to store though.

  12. #12
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    Turns out rigid foam board is expensive - $15/sheet or so. And if I need even at minimum 6, thatís almost $100. Iíd rather stick with a pop up canopy at that price.

  13. #13
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    Quote Originally Posted by glenn bradley View Post
    Ive used this system (single fan) for years. Carefully taped the panels together so that they can be folded as a unit and store it above the garage door. Takes 5 minutes to slide down and set up.

  14. #14
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    Quote Originally Posted by Matt Day View Post
    Turns out rigid foam board is expensive - $15/sheet or so. And if I need even at minimum 6, thatís almost $100. Iíd rather stick with a pop up canopy at that price.
    Exactly why I use plastic sheeting. Cheap, and easy to store.

    John

  15. #15
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    Harbor Freight has a couple of framed - plastic things that might work. I dont have opportunity to look right now, but I've seen them in the past and thought that would be a good use for them.

    I used shower curtain liners on sections of conduit in a pinch before, but it would be nice to have a better set-up

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