TREX RainEscape® Wall Flashing: Critical Seal for Ledger Boards

The TREX RainEscape Wall Flashing is a critical moisture barrier that seals the vulnerable space where your deck meets the house. Designed for use with the full RainEscape under-deck drainage system, this self-adhesive flashing helps prevent water intrusion, ice buildup, and long-term structural damage to your substructure and exterior wall.

Key Benefits

• Seals Critical Deck-to-Wall Joint:
  Blocks water from seeping between the ledger board and the home’s exterior.
  
  
• Reduces Risk of Ice Buildup:
  Prevents freeze-thaw cycles that can lift, shift, or damage deck boards over time.
  
  
• Protects Deck Framing:
  Shields joists and house framing from moisture-related deterioration.
  
  
• Compatible with All Decking Brands:
  Works on any joist spacing (12″ or 16″ OC) and with wood, composite, or PVC decking.

Product Features

• Self-Adhesive Backing:
  Quick and secure installation with no additional tools required.
  
  
• Flexible Material:
  Conforms easily to fit uneven surfaces for a complete, watertight seal.
  
  
• Weather-Resistant Construction:
  Durable protection from rain, snow, and harsh UV exposure.

Installation Guidance

• Install flashing before laying down decking material
• Press adhesive backing firmly onto clean, dry surfaces for best results
• Pairs seamlessly with:
  • TREX RainEscape Troughs
  • TREX RainEscape Downspouts
  • TREX RainEscape Tape

Why Choose TREX RainEscape Wall Flashing?

This simple but essential addition enhances the long-term health of your deck. It provides superior moisture control at one of the most common points of failure — the ledger board — helping to prevent rot, mold, and costly repairs while extending the lifespan of your entire RainEscape system.

Resources & Support

• Installation help

Need help planning your installation?
Contact our team or visit a Deck Store showroom near you.