Trex RainEscape® Wall Flash

Seal the Ledger Area for a Fully Waterproof Under-Deck System

Trex RainEscape® Wall Flash is a key finishing component of the Trex RainEscape Under-Deck Drainage System, designed to seal the critical joint between your home’s exterior wall and the deck ledger board. Installed behind the troughs, this narrow flashing strip helps divert water away from the house and into the drainage system—preventing leaks, wood rot, and long-term structural damage.

Product Features:

• Protects Ledger Connection – Seals the vulnerable gap between the home and deck to block moisture intrusion

• Efficient Water Diversion – Directs runoff into the Trex RainEscape troughs for proper drainage

• Durable, Weather-Resistant Build – Withstands UV exposure and harsh weather conditions

• Flexible and Easy to Apply – Simple peel-and-stick design that conforms easily to the wall surface

• Low-Profile Protection – Slim design fits neatly behind the trough for a clean, discreet installation

Specifications:

• Width: 1"

• Length: 25 ft roll

• Thickness: 1/4"

• Material: UV- and weather-resistant polymer

• Color: Black

• Installation Position: Against the house wall, above the ledger board, behind the trough

• Compatibility: Works with all Trex RainEscape components

Installation Tips:

• Apply to a clean, dry surface prior to installing the trough

• Position flush against the house wall to fully cover the ledger joint

• Use Trex RainEscape Butyl Tape or Caulk to seal edges and ensure watertight performance

• Make sure the flashing runs behind the trough to direct water away from the structure

Complete your Trex RainEscape system with Wall Flash to protect the ledger area and keep your under-deck space dry and damage-free.