![]() ![]() The hot summer weather further cooks the trapped, waterlogged wood and accelerates the rotting process.The only real ventilation is between the quarter-inch or less space between boards. If the ceiling panels are installed under the deck, there is no air coming to dry out the wood. This type of system can also trap moisture.The water hits the pan and runs out, but not before drenching the wooden joists. The continual exposure of the wood to the water as rainwater drips through the deck and into the drainage system below weakens the structure.As a result, when these decking joists repeatedly get wet, they will eventually start to rot.īelow-joist drainage systems cause damage and wood rot in three ways: However, because the draining occurs under the decking materials, this system allows water to drip through the boards and over the wooden joists. They catch and drain the water away through the boards using corrugated plastic or aluminum panels. Similar to the flanges, these are installed underneath the deck boards and drain the water out, providing a two-in-one drainage system and a finished ceiling. Under-Deck Ceiling SystemsĪnother solution is the under-deck ceiling system. It is also possible that they may break down over time due to improper installation, rendering the waterproofing system ineffective. Some flanges may require trimming the deck boards to accommodate their shape. These prevent water from dripping below and can be designed to act as gutters that channel the water to the edges of the deck (contractors typically install these flanges by pounding them into the deck edges with a rubber mallet). They divert rainwater to the area below the deck.īut what if you want the space underneath to be dry? One waterproofing solution is to fill these gaps with rubber flanges. The spaces between the deck boards provide a convenient draining system for precipitation that prevents prolonged moisture exposure. Please read below to learn the best choice when it comes to keeping your deck sturdy and dry for years to come. Over time exposure to harsh weather conditions, water and temperature can cause your outdoor living space to decay and lose its shine. This type of deck drainage system not only covers and protects the entire timber substructure it also creates a usable area beneath the deck that can be used for additional living space or storage.To prolong the lifespan of your outdoor wood deck, you must install proper drainage. An over-the-joist deck drainage system such as Trex RainEscape provides 100% protection from the damage caused by timber repeatedly getting wet. If you have a second-story deck, you can install a deck drainage system to divert water away from the joists and bearers.See how Trex RainEscape® Wall Flash protects in this video. Trex RainEscape® Wall Flash comes with a 25-year warranty from Trex, the world’s #1 composite decking brand. Wall flash is best used during the construction of a new deck and is another small investment with big returns. Easy-to-install, self-adhesive Trex RainEscape Wall Flash seals the space between your house and ledger board to keep water out.To find out exactly how much Trex Protect Joist, Bearer & Rim Tape your project requires, use our Materials Estimator. So for less than a $130 investment, the deck substructure can last as long as the decking it supports. For an average size deck, measuring 3.6m x 7.3m, five rolls of Trex Protect Joist Tape and one roll of Trex Protect Bearer Tape will be all you need. Trex Protect guards against costly future water damage - at a low cost. This non-skid, self-adhesive deck flashing tape shields the tops of joists, rim joists, bearers and the ledger board from moisture that can lead to the development of rot and timber decay and the loosening of deck screws and fasteners. The average deck begins to experience water damage within 8 to 10 years. ![]() Here, moisture can become trapped and wreak havoc on your well-built deck. In fact, serious damage often starts with the joists and the boards that fit against the house. To ensure your reputation as an outstanding builder and help your homeowners’ decks last longer, you have to think about what’s protecting the timber you can’t see. But as a builder, you know that water damage is more than skin deep! Often when homeowners think about waterproofing a deck, they focus on using a sealant on the boards to reduce weathering. ![]()
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