Attic Decking Plywood Thickness

Several list advise regarding 4 x 8 sheets of plywood flooring being laid on top of joists for decking material in an attic along with pull down access stairs.

Attic decking plywood thickness.

Plywood roof sheathing 5 8 plywood attic dek 3 8 plywood osb 4x8 11 32 plywood. The cost savings is insignificant compared to the extra support offered by the thicker material. If you plan to finish the floor in the attic and turn the room into a living space however you. Another product by racor called.

The recommended thickness of the plywood subfloor is governed by the spacing of the joists. Take the measurements for your subfloor and measure enough plywood so that you can cover the entire frame. Glue is sprayed between each layer and the sheet is hot pressed. The thinner plywood is acceptable when the joist spacing is 16 inches.

Measure the plywood and attic door. Purchase half inch 1 27 cm thick plywood to act as your flooring. A single 4 pack covers approximately 10 sq. If you plan on placing the plywood around the perimeter of the opening or door and using it only to store light boxes or materials 1 2 inch thick plywood should suffice.

Some experts suggest that 15 32 inch plywood should be standard if the underlying floor joists are spaced 16 inches apart or less but slightly thicker 3 4 inch plywood should be used for joists spaced further apart. If your joists are 16 on center then you could get away with 1 2 plywood. For joists 24 on center 3 4 plywood is what i would use. On center joist spacing.

Installing attic flooring for light storage only if your attic joists won t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light. You need 3 4 inch plywood. But there s no real reason to use plywood thinner than 3 4 inch. The only storage system designed specifically for the unfinished areas over a garage or under a roof.

These lightweight easy to manage panels can be installed by even the most inexperienced homeowner in about 15 minutes. A single 4 pack covers approximately 10 sq. Attic flooring panels are easy to install with their interlocking edges. Cdx plywood is traditional wood plywood made from thin layers of lumber known as veneers.

You ll need to make sure that the plywood can fit through your attic door. Cdx plywood should be a minimum of 7 16. That s what you should find on your home s main flooring areas.