Installing New Plywood Over Old Flooring

When laying it over an existing floor a.

Installing new plywood over old flooring.

The subfloor is in good condition but we are thinking of putting plywood over it before installing the flooring. You ll start laying plywood over floorboards by putting a square in the corner and leaving about 1 8 inch between the plywood and the wall. And should we use rosin paper between the plywood and subfloor. If you re dead set on keeping the original direction a minimum 3 8 plywood sub floor should be installed over the older floor.

Plywood is the best subfloor choice to lay on top of the pine because it nails in securely and creates a flat even surface for the new floor to adhere to. Is 1 4 in thick plywood okay or do we need something thicker. Installing plywood underlayment over a subfloor is fairly straightforward. If installing wood flooring over an existing wood floor there are some extra precautions.

First you want to be sure you don t sand any surfaces containing lead based finishes paints or asbestos. If this is not an issue you can sand off the old finish and or high spots then prepare the flooring by making any repairs or replacements of loose. Connect the edges unroll any required underlayment and moisture barrier in long strips joining each row with.