How to Patch a Hole in Subfloor

Published: 01 October 2026
on channel: HAUS PLANS ®️

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This is not gonna work- A floor register got installed right by the front door. Let’s see if we can move it…
The boots for these registers are held in with roofing nails.
So, I use a cat’s paw and a hammer to pry on the boot and then I pop the nails out.
Luckily, the flex line wasn’t hooked up yet.
I asked The New Guy if he could work late and patch this hole, he mumbled something about dinner plans and drove off.
I guess I’ll do it myself.
I start by cutting a piece of subfloor 2 inches bigger than the hole all the way around.
Then I install a 3” screw in the middle to use as a handle.
Next, I put subfloor adhesive around the edges.
I lower it the piece down through the floor using the screw as a handle and pull it back up tight.
I use the claw end of my hammer to hold the board tight while I fasten it in place with screws.
If you ask me, glue is like horsepower- you can’t have too much.
I found the piece of subfloor that was cut out for the floor register and put it right back in the hole. I’m screwing it down with 1 ½” T25 deck screws.
Honestly, I would argue that this repair is stronger than the original floor- what do you think? ‪@hausplans‬

#build #howto #construction #diy #contractor #hack

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