What pieces make up the Trex RainEscape Deck Drainage System?

Maximize your living space with the Trex RainEscape Deck Drainage System. Trex RainEscape is a unique under-deck drainage system that uses a combination of troughs and gutters to keep rail, spills, and snow melt from dripping through elevated deck boards. The Trex RainEscape Deck Drainage System creates a dry space that is perfect for lighting, ceiling fans, lounging systems, and more!

It is installed on the deck joists underneath the deck boards, so is typically installed during the deck build. The system can be installed using caulk, tape, and staples. It is designed to be easily installed by any DIY-er or builder. Trex RainEscape protects against rot by keeping floor joists dry and can be adjusted to fit both standard and non-standard joist spacing.

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The Basics


Step 1 - RainEscape Down Spout by Trex

RainEscape Down Spout by Trex

RainEscape Down Spouts for waterproofing under deck space are easy to install and fit both 12-inch and 16-inch center joist cavities. You will need at least one downspout for each joist cavity.


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Step 2 - RainEscape Trough By Trex

RainEscape Trough By Trex

The Trex RainEscape Trough directs water to your downspouts. Troughs are available in two lengths (12 feet and 16 feet) and can fit 12-inch or 16-inch joist spacing. Attach with caulk and staples and you'll ensure a waterproof seal under your deck.


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Step 3 - RainEscape Butyl Tape By Trex

RainEscape Butyl Tape By Trex

Available in 4” wide rolls of 50’, the RainEscape Butyl Tape by Trex is specially designed to seal out moisture when used with the Troughs and Down Spouts.


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The Extras


RainEscape Butyl Caulk By Trex

RainEscape Butyl Caulk By Trex

The RainEscape Butyl Caulk By Trex is specially designed for use with the rest of the Trex RainEscape system. Each 10.3 oz tube covers approximately 50 lineal feet.


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RainEscape Post Flash By Trex

RainEscape Post Flash By Trex

Trex released their RainEscape Post Flash for 4x4 wood posts for further protection against moisture. The snug-fitting collar slides over a 4x4 post and is secured with caulk and butyl tape.


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RainEscape Elevations Double Sided Tape By Trex

RainEscape Elevations Double Sided Tape By Trex

Used on Trex RainEscape installations on a Trex Elevations steel framing system, the RainEscape Elevations Double Sided Tape replaces the need for staples for the Troughs and Down Spouts. Each roll is 2-½” wide by 50’ long.


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RainEscape Wall Flashing by Trex

RainEscape Wall Flashing by Trex

Sealing the gap between your house and deck boards, RainEscape Wall Flashing by Trex is a self-adhesive flash that helps prevent structural damage to your deck. Keep your ledger board dry and safe from snow, rainwater, and rot by using Wall Flash.


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More Information


Materials Estimator

Trex RainEscape has created a Materials Estimator that can help you determine the quantities of each item that you will need for the size of your deck. You just need to measure your deck's dimensions and fill out the form to see what you need!

Materials Estimator

Match RainEscape To Your Trex Decking


Trex RainEscape comes in two color options: black and tan.

Trex RainEscape Downspout, shown in black Trex RainEscape Downspout, shown in tan
Trex RainEscape Trough, shown in black Trex RainEscape Trough, shown in tan

Use the charts below to match your RainEscape system to your specific shade of Trex decking for a cohesive deck look!

Black Trex RainEscape drainage systems will pair well with these Trex Transcend, Select, and Enhance decking shades
Brown Trex RainEscape drainage systems will pair well with these Trex Transcend, Select, and Enhance decking shades

Feel free to give our experts a call at 1-888-824-5316 or send us an email at hello@decksdirect.com if you have any questions during any point in your project.