Attic Decking Plywood

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Attic decking plywood.

Joist spacing and attic use the joist spacing in some attics is 24 inches and 1 2 inch sheets will sag and possibly break when spanning that distance. I was able to find the appropriate amount of tongue and groove decking at the local home depot for total cost of less than 50 but could probably be even cheaper if you decided to use larger sheets of plywood or something. However the same can t be said if you are planning on using the space as a living space. As an alternative 3 4 osb can be used.

Lay sheets of the plywood onto the floor spanning the joists with a 1 2 inch space between the walls of the attic and the edges of the plywood. In that case you will need to use 3 4 thick plywood. A single 4 pack covers approximately 10 sq. Attic flooring panels are easy to install with their interlocking edges.

Place the sheets of plywood so that the edges of each board ends at the center of the floor joists with a 1 8 inch gap between adjacent boards on the same joist to allow for wood expansion. An attic can be floored with 1 2 cdx plywood if it is being used only for storage. Don t use 7 16 osb as it is intended for external sheathing and isn t strong enough to be used as a floor. These lightweight easy to manage panels can be installed by even the most inexperienced homeowner in about 15 minutes.