Ask any seasoned contractor where a deck is most likely to fail, and odds are they’ll point to the ledger board. If it’s not properly installed and protected from moisture, this critical connection point can quickly become the weak link in an otherwise solid structure. That’s where Trex® Seal™ Ledger Tape comes in—a moisture-blocking MVP engineered to safeguard the ledger board and support the long-term integrity of the entire deck.
Moisture: The Common Denominator in Deck Failures
Deck failures often trace back to water intrusion. In many cases, the small gap between the house and the deck can allow water to drip down and pool on the ledger board. Over time, this constant exposure causes wood to absorb moisture, swell, crack, and decay—especially as seasonal expansion and contraction take their toll.
Why Traditional Flashing Falls Short
Protecting the ledger board is essential—but not all flashing is created equal. Metal flashing, though common, requires nails or screws for installation, which puncture the material and create points of entry for water. Moisture can seep into those fastener holes, leading to wood rot and rusting hardware.
That’s why flashing tape is a better choice. Its self-adhering design creates a tight, waterproof seal over boards and fasteners—offering superior protection.
Trex Seal: Smart Design Meets Superior Performance
Purpose-built for use on deck ledger boards, Trex Seal combines the strength of aluminum flashing with the sealing power of high-performance tape—all in one easy-to-use product. Its 11” width fully covers the ledger board surface and spans the gap between the ledger and deck substructure, providing a continuous barrier against moisture.
The tape’s double-release liner (split at 5.5”) makes application simple—allowing installers to fold and position it accurately without the hassle of spring-back or wrinkles. It’s also AAMA 711-13 compliant, and its extra width eliminates the need to piece together multiple strips of standard tape, saving valuable time on site.
Better Than Metal. Smarter Than Standard Tape
Trex Seal delivers the ideal balance of strength, flexibility, and waterproofing. Its durable aluminum backing enhances stability and durability, while the butyl adhesive creates a lasting bond that keeps water out and protects your ledger board for years to come. When paired with Trex® Seal™ Sub-Ledger Tape, the system provides comprehensive, code-compliant protection you can trust. Stop deck failure before it starts. Learn more at TrexSeal.com.
