![]() Do not use nails to attach the deck boards above the Trex RainEscape system.The Trex RainEscape system cannot support body weight. Do not stand anywhere other than the top of the floor joists, ledger, rim joists, or headers.Call a Trex RainEscape Specialist at 1-87 for recommendations. Do not use spiked hidden fasteners or any fastener without a flat base to provide pressure to butyl tape. ![]() Do not staple Trex RainEscape products anywhere other than into or over floor joists, ledger, rim joists, or headers.Ensure the troughs and downspouts are dry and clear of debris before applying the tape.Cover the Trex RainEscape system with deck boards.Cover all joists and blocking with trough material, then tape. ![]() The main idea is that you’re creating a waterproof system, so you’ll have to take precautions not to puncture the system in a way that would create a leak. There are also some quick dos and don’ts to keep in mind. To estimate the cost of your under-deck drainage system, check out this materials estimator. Make sure the tape completely covers all seams and anywhere a screw will penetrate the Trex RainEscape system. Get complete instructions and watch a video to ensure a quality installation. Do not seam or overlap the troughs to extend their length. When working with the Trex RainEscape trough material, ensure that the smooth/shiny side always faces up. The downspout should extend 1″ into the gutter: cut or extend as necessary. Install all downspouts along one rim joist and/or ledger board cut out the side toward the open deck bay. Install the Trex RainEscape downspout.Ĭut downspouts along one 12″ or 16″ side on score mark, based on joist spacing. ![]() Installing your watertight gutter system requires just four steps. It’s also helpful to have a midspan nail on the joists’ underside to keep them straight. The tools needed to DIY your under-deck drainage system are probably items you already have handy: Tools Needed for Installing a Deck Drainage System Trex Protect’s butyl tape covers the top of the joist, rim joist, and ledger board and helps prevent rot and wood decay. One more low-cost idea for preventing water damage: use flashing tape over the joists and beams. These vents release hot air and help mitigate temperature extremes. As you’ll see, Trex RainEscape offers high-quality and easy installation.Īdd extra protection, especially in high humidity areas, add ventilation to your under-deck ceiling with strip vents. Then, use this handy chart for comparison. This type of system also helps to hold the screws in place longer.įor the DIY builder, be sure to choose an over-the-joist system that’s easy to install. This type of system provides 100% protection of all the joists and beams from moisture penetration. The best deck drainage systems are above the joists. See what happens to wood with under-joist drainage systems in this video. Over time, this is the perfect formula for wood rot: moisture + heat – ventilation = destruction. Third, in the hot summer months, the temperature further cooks this trapped, wet wood and accelerates the rotting.The only ventilation is through the quarter-inch or less spaces between the top boards. There’s no air coming in to dry out the wood if installing a ceiling beneath the deck. Second, this type of system can trap moisture.The water hits the pan and runs out, but not before drenching the joists. First, they allow the wood to get wet repeatedly as rain drips through the deck boards, over the joists, and into the drainage system below.An under-joist system allows water to trickle through the slats in your decking, run over the joists, and collect in the drainage system beneath.īelow-joist drainage systems cause damage and wood rot in three ways: An over-joist system is just that: a drainage system installed over the joists, so water never comes in contact with the joists. When it comes to deck drainage systems, there are essentially two choices: over-joist or under-joist. Want to add a play place for the kids? How about an entertainment area for friends and neighbors? Perhaps a private spa and hot tub? Or a storage space for seasonal decorations or sports equipment? An under-deck drainage system makes it all possible just by using the unused space under your two-story deck. The under-deck drainage system does all of the work, drawing away water from your decking - Trex composite boards or any decking -leaving you with dry space and so many wonderful possibilities. With a drainage system in place, you can add a ceiling system/deck roof and not have to worry about waterproofing. Check out this video for step-by-step directions. The great news is it’s an easy add-on for any deck builder - do-it-yourself or pro. If you’re adding a second-story deck to your home, there’s one element that will add lasting value to your outdoor living space: an under-deck drainage system.
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