![]() But which one to choose?Ĭheck out this chart for comparison. Of course, you now know you should get an over-joist system. Not only does an above-joists system provide 100% protection of all the joists and beams from moisture penetration, but it also helps to hold the screws in place longer. Thus, when planning a deck, settle for nothing less than an above the joists system. In the heat of summer, wet wood cooks and rots.Even an 8-year-old deck needs to be replaced when this happens. With no air coming in to dry out the wood, the wood rots faster. This system traps moisture between the deck boards above and the ceiling below.As rain drips through the deck boards, over the joists, and into the drainage system below, it drenches the joists. An over-joist system allows the wood to get wet repeatedly. ![]() With an under-joist system, water trickles through the spaces between your deck boards, runs over the wood joists, and collects in the drainage system, causing damage in three ways: There are essentially two choices for drainage systems: over-joist or under-joist.Īn over-joist system, installed over the joists, never lets water touch the wood deck framing. What are the Options for Drainage Systems? A screened-in porch for dining free of insects.Storage space for sports equipment or seasonal decorations.An entertainment area for friends and neighbors.The drainage system draws away water from your decking - Trex composite boards or wood deck boards -leaving you with many wonderful options: You can add an under-deck ceiling system or deck roof with a deck drainage system and not worry about rain or ice dripping through your deck boards. In addition, using a watertight gutter system makes it possible to waterproof under your deck. Just as you’d think, a deck drainage system pulls water away from your deck and away from your house. Wait, What’s An Under-Deck Drainage System? Watch this video or read on for step-by-step directions. It is simple for any deck builder - DIY or pro. Sound impossible? Not if you finish the space under your two-story deck! To create dry space under your deck, though, you need an under-deck drainage system. Your new deck gives you more room to party, but what if you could double your outdoor living space? Then, you can’t wait to invite the whole gang over for your next family birthday or holiday. Planning a new deck allows you to be creative with your designs and dreams for deck boards, furnishings, and accessories.
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