Knock Down Finishing Booth #1: Half Laps Everywhere

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Blog entry by RoadHogg posted 02-02-2015 07:14 PM 954 reads 0 times favorited 3 comments Add to Favorites Watch
no previous part Part 1 of Knock Down Finishing Booth series Part 2: Installed 6 mil Poly »

Since I don’t have a dedicated finishing room, in which I can control air flow and quality, I always run into an issue when finishing a project. When I apply finish, I can’t do anything else in the shop until I’m done the finishing process, since I’d create way too much dust. Even if I abstain from other work, there’s always dust that creeps into the finish.

The solution is a dust free commercial finishing booth…but I’m not about to buy one. I do have space in the 900 sq ft garage with my wood shop so I thought I’d build a knock down booth using 1×4’s and 6 mil poly. Add a furnace blower and some furnace filters and I should be able to create a reasonably clean booth, and still be able to knock it down for storage when I’m not using it.

I decided to just use 1×4’s (for anyone in California, that’s the name of the lumber, not the dimension) to build a skeleton on which I can attach the 6 mil poly plastic (easily available here because that’s what all heated buildings use for vapour barrier.)

Here’s the Sketchup…it looks more like a prison cell.

My calculations show about 34 pcs of 8’ 1×4’s so I bought 40 pcs.

I decided to use half laps for joinery and Titebond III for weather resistance in case it gets left outside at any point.

-- "The difference between school and real life is that in real life the tests come first, and then the lessons" -- Robert Lang,

3 comments so far

View Grumpymike's profile


1900 posts in 1740 days

#1 posted 02-02-2015 08:19 PM

Hope that this works out well for you, It Would be a real problem in my 1155 sq. ft. shop taking up 8×8 ft. floor space, and storage when broken down would also be a hassle.
I think your idea is good, but not for me.

-- Grumpy old guy, and lookin' good Doin' it. ... Surprise Az.

View Mark Kornell's profile

Mark Kornell

1057 posts in 1955 days

#2 posted 02-03-2015 05:30 AM

Looking good, Brad. Are you going to be putting in a filter bank for incoming air?

-- Mark Kornell, Kornell Wood Design

View RoadHogg's profile


124 posts in 1352 days

#3 posted 02-03-2015 05:34 AM

Thanks Mark. Yes, the side with the door has two vertical spaces that will accept 20” filters, those seem to be the most common. I got four of them on sale yesterday.

I’m not building this to spray flammable finishes yet, I’ll have to work out better ventilation before I can do that.

-- "The difference between school and real life is that in real life the tests come first, and then the lessons" -- Robert Lang,

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