Trex RainEscape Blog

A second-story deck offers a wonderful and relaxing place to enjoy the great outdoors, but what about the space below? Turn your under-deck area into a liveable spot by installing the Trex RainEscape Deck Drainage System! This innovative system keeps the space below your second-story deck dry by channeling rainwater out. Protect your patio and the floor joists of your elevated deck with ease - you’ll be able to sit outside rain or shine! Keep in mind that the Trex RainEscape is for new builds and must be installed before laying your deck boards.

How it Works

RainEscape uses high-density polyethylene plastic (HDPE) material that acts as a trough between the joists and deck boards. Water travels through the trough to downspouts on the edge of the deck, keeping joists and the space below dry. The RainEscape system is designed with function in mind, allowing for the installation of fans, speakers, or other electronics.


The Trex RainEscape system is easy to install and blends seamlessly with your upper-level deck. This system needs to be installed prior to laying your deck boards. Post flashing is available for 4x4 wood posts, which is a collar that fits snug to further prevent moisture penetration. The HDPE trough material goes on top of the joists and can be secured using caulk,  butyl tape, or staples (sold separately). Downspouts should be placed at the end of the troughs in order to expel water away from the board and into your gutter. After the system is fully installed, deck boards are then attached to the joists as usual. The Trex RainEscape system fits both 12” and 16” joist spacing and is easily modified to fit 24” and non-standard joist spacing.

The Trex RainEscape Deck Drainage System is an excellent way to prevent rotting from moisture while expanding your outdoor living space to the under-deck area of your home. Please note, this system can only be used for new projects; it cannot be installed on an existing deck. The Trex RainEscape system is available now at DecksDirect - contact us today for more information and to get a free estimate!