Over Joist Attic Decking

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.

Over joist attic decking.

Redesigned to fit either 16 or 24 on center joist spacing supports up to 250 lbs making it easier than ever to get those cluttered spaces organized. Build a frame on 16 centers perpendicular to the attic floor joists. Standard joist spacing for the installation of attic flooring materials is 16 inches on center oc meaning the distance from the center of one joist to the center of the next joist is 16 inches. A raised platform of lumber in dimensions of 2 4 or 2 6 with insulation placed between joists and covered up with a 12 inch plywood helps build the right flooring.

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. 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. You need 3 4 inch plywood. Attach metal covers to electrical junction boxes and move any electrical wires out of the way or notch the frame to fit.

Installing flooring material over the attic doesn t quite leave room for the recommended insulation space needed to provide efficient home energy. Cut 2 thick lumber to length for the frame. Place a 2 inch by 3 inch board directly on top of the joist nearest to the edge of the attic with its largest. Here s how to go about it.

Screw the frame to the joists to. Attic flooring panels are easy to install with their interlocking edges. The ceiling load may include items like drywall ducts recessed lights bathroom fans and attic insulation. Walk to one end of the attic by carefully stepping only on the wooden ceiling joists.

A single 4 pack covers approximately 10 sq.