Putting Plywood Over Attic Insulation

That s clearly your plan if any moisture makes its way to the plywood the damp plywood will dry out on hot sunny days.

Putting plywood over attic insulation.

It s not a vapor barrier. This is probably the easiest method to install radiant barrier atticfoil is to lay the foil out over the existing insulation on the attic floor. Your plywood will be fine especially if you are paying attention to airtightness when you build your ceiling. Carry a piece of plywood to one of the far corners of the attic and lay it on top of the installed boards.

This method can be used in any climate though it historically has been most popular in colder climates. Maneuvering heavy 4 x 8 sheets of plywood or osb oriented strand board up to an unfinished attic is sometimes like trying to fit a square peg into a round hole. Laying foil over on top of insulation on the attic floor. So you can put 8 inches of insulation down then put the plywood over that.

Ensuring adequate insulation under the flooring. To make the job easier use a circular saw to cut the plywood sheet first into 2 2 8 strips which will be much easier to handle. You put the insulation down first and let s say you have 2x8s for your floor joists in the attic. Most attics are dry plywood is a smart vapor retarder with variable permeance.

How to install plywood flooring in an attic insulating your attic. Now in your particular part of the country you re going to want a lot more insulation than that.