![]() 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. ![]()
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