Trex® RainEscape® Under-Deck Drainage System

Collection: Trex® RainEscape® Under-Deck Drainage System

8 products

Trex® RainEscape® Under-Deck Drainage System

Transform Your Elevated Deck into a Dry, Usable Space

The Trex® RainEscape® Under-Deck Drainage System offers a comprehensive solution to protect your deck’s substructure from moisture while creating a dry area beneath. By utilizing a network of troughs and downspouts installed above the joists, RainEscape effectively channels water away from your deck, safeguarding the structural integrity and expanding your outdoor living space.


Key Benefits:

  • Complete Moisture Protection – Installed above the joists, RainEscape shields the entire substructure from rain, snow, and spills, preventing rot and decay.

  • Extended Deck Longevity – Keeps joists dry, helping maintain the strength of fasteners and prolonging the life of your deck.

  • Versatile Outdoor Living – The dry space beneath your deck can be finished with lighting, ceiling fans, entertainment centers, and more.

  • Easy Installation – Components fit between joists and are secured with staples and tape; ideal for new builds or retrofits.

  • Durable Materials – Constructed from high-density polyethylene (HDPE) and backed by a 25-year warranty.


Available Components:

  • Troughs – Direct water to downspouts; available in various lengths for different joist spacings.

  • Downspouts – Channel water from troughs to the ground or designated drainage area.

  • Butyl Tape – Ensures a watertight seal between components.

  • Caulk – Seals joints and seams for added moisture protection.

  • Post Flashing – Protects deck posts from water intrusion.


Explore our collection of Trex® RainEscape® components to create a reliable, high-performance under-deck drainage system. Enjoy a drier, more functional space beneath your deck—perfect for storage or expanded outdoor living.