Composite decking is intended to be installed directly to the structural joists. DO NOT fasten to the top of old existing deck planks or balcony and porch floors.

Yes. For this application, we recommend using the Deckorators Sleeper system as support beneath the deck boards in conjunction with our mineral-based composite decking. Arrange the sleepers on the existing patio and install decking.

If using wood-plastic composite, we recommend 2x6 boards standing vertically on edge as support joists over the concrete. Next, fasten the decking to the support joists.

Be sure to allow a ¼" gap between the long edges of the deck boards. Drainage and ventilation are necessary for best product performance. To level the deck, we recommend shims that allow a clear 2" space between the bottom edge of the joists and the concrete. You’ll need to check with your local building code agency on foundation footing requirements. See the installation instructions for full details.

Our Deckorators grooved-edge deck boards work perfectly with Deckorators StealthLock™ Universal Deck Clips, providing a fastener-free look. These fasteners install between the grooved edges of deck boards, which eliminates the need for pre-drilling, automatically spaces deck boards with the appropriate gap, and makes installation quick and easy.

If traditional fastening through the top of the decking is preferred but a fastener-free appearance is still desired, Pro fastening systems are the fastest, easiest way to hide deck screw heads on stairs, on perimeter boards, or when replacing a deck board. For more information, view our Compatible Deck Fastener Information Sheet.

Yes, all Deckorators® decking requires consistent spacing between boards to allow for water runoff. However, the specific gapping requirements vary by product line due to differences in thermal expansion and contraction.

For Voyage Decking, Vault Decking, and Porch Flooring: Our patented Surestone® Technology minimizes thermal expansion and contraction (approximately ¼" over a 20' board in extreme temperatures). This means end gapping is less critical, but consistent spacing is still recommended. Please refer to each product line's installation instructions for precise gapping guidelines.

For Vista and Venture Decking: Gapping at the ends and between boards is necessary to accommodate expansion and contraction. At the ends of the deck boards, allow a minimum of a 1/16" gap for every 20°F difference between the installation temperature and the hottest temperature expected. Additionally, allow a 1/4" gap between the deck boards and between all decking and any permanent structure or post for water runoff. Please refer to each product line's installation instructions for detailed gapping requirements based on the installation temperature.