Attic Dek panels offer a simple means to create a strong attic floor surface in attics with joists spaced 16 or 24 inches on center. The lightweight, interlocking panels are attached to joists with 2-inch screws, and the company claims each panel will support up to 250 pounds.
A pack of eight 16-inch square panels covers 14 square feet and costs about $45, or $3.20 per square foot. That’s considerably more than the cost of plywood or wood planks, but installation is quicker. A four-pack of 24-inch by 16-inch panels will provide 10 square feet of flooring and also costs about $45.