Wahoo Decks. DryJoistEZ deck joists provide a structural alternative to wooden deck joists, drain water via 5-inch channels, and create a protective beadboard-style ceiling over the space below. Made from powder-coated aluminum with 45 percent recycled content, DryJoistEZ is waterproof, fireproof, and bug proof, says the company. The 24-foot-long joists can span 6 feet post to post on a single span or 8 feet post to post on a multi-span. 877-270-9387. www.wahoodecks.com.