How To Fix Plywood Floor Joints

Leveling compound comes in two basic formulations.

How to fix plywood floor joints.

Leave a gap the size of a credit card between the two sheets. Plywood firmly fastened to the undersides of joists helps prevent this side to side bending and stiffens the floor. If you have any questions or maybe. Plan so the joints in the backerboard won t line up with the joints in the subfloor.

If you have sagging cracked or twisted joists which can happen in older houses this project will provide the extra support the floor needs. Cement based formulations such as henry 555 levelpro are designed for wood and concrete subfloors while patching compounds such as fix it all are composed primarily of calcium carbonate and silica quartz and are intended primarily for wood. Fix the plywood to the floorboards with ring shank nails every 15 mm 6in around the edge of the board. A layer of 3 4 in.

Continue laying the first row of boards in the same fashion across the. Do a dry run and lay the backerboard down to fully cover the area you plan to tile. The backerboard should completely cover the subfloor joints. For this fix to work well the upper edges of the joists must be solidly fastened to the subfloor above.

I thought i d ask the collective wisdom on here before doing that. Repairing flooring vinyl wood or tile costs 347 on average or between 188 and 512 because pros need to go through this layer to get to the structural elements of subfloors and joists expect to pay far more for structural repairs. I made this video to show the process i use to cut out and repair and broken damaged or weak section of plywood subfloor. This article provides step by step instructions and pictures on how to make structural repairs by sistering floor joists alongside weak joists.

If needed cut the backerboard to fit in small spaces or around obstructions. The next layer of filler to go down before the vinyl flooring is 1 4 inch birch plywood. Squeaks in a floor usually mean that the subfloor has loosened from the joists. The plywood is nailed down not screwed and one idea is to put some screws in and see if that tightens it up.