How To Fix A Hole In Sub Floor

Repeat on the other parallel exposed joist.

How to fix a hole in sub floor. The first step is to put some dead wood underneath the hole so you have a way to secure the patch. Measure and cut the plywood use 5 8 cdx plywood to replace the original subflooring. Cover that with a few thicknesses of paper toweling. Hammer or screw the birch plywood every four inches along each seam.

Sister a support board for the new plywood take a 2 x 4 or 2 x 6 2 x 8 and screw it into the exposed joist being careful that the top edge aligns with the floor joist. Birch plywood is extremely smooth with no surface voids visible grain or high sections. These boards will now support the new plywood that you re going to cut to replace the damage. Remove the screws when replacing a full sheet of subfloor.

Insert a pry bar into the seam between boards and push down on the pry bar to lift the board. Get your wood glue and apply a generous line around the edges of the opening you routed and then a bead along all for edges of your patch and press it into the opening. I wanted to use the largest pieces of wood i could fit between the joists under the subfloor to disperse over the largest area possible any weight that will eventually be put on this patch. Cover the entire area where the vinyl.

The i m using two pieces one on each end. Cover the patch with a sheet of cling film saran wrap or use a plastic grocery bag. Usually water is the culprit in which case the source of the water leak must be identified and fixed or you could end up with the same problem down the road. Measure and cut plywood as needed to cover the damaged area.