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Joist Protection Tape
Waterproof barrier systems that protect your deck substructure for decades
Prevents Rot
Waterproof barrier stops moisture damage at the source
Extends Life
Joists last significantly longer with proper protection
Self-Sealing
Butyl adhesive seals around fasteners automatically
Deck joists are the most vulnerable part of your deck structure. Water pooling on top of joists leads to rot, even in pressure-treated lumber. Joist tape creates a waterproof barrier that extends the life of your substructure.
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How Joist Tape Prevents Deck Rot
Clean the Joist Tops
Brush off sawdust, dirt, and moisture from every joist surface. The tape bonds best to clean, dry wood — even pressure-treated lumber benefits.
Roll Out the Tape
Unroll the self-adhering butyl tape along the top of each joist. Press firmly as you go. Overlap seams by at least 2″ to prevent water wicking between layers.
Seal the Ledger
The ledger board connection is the single most failure-prone joint on any deck. Apply ledger flashing tape from the top of the ledger down and over the face, lapping onto the house wrap.
Fasten Through the Tape
When you drive screws or nails through joist tape, the butyl compound self-seals around each penetration — maintaining the waterproof barrier even at fastener points.
Pro Tip from Our Deck Specialists
Even pressure-treated joists rot at the top surface where water pools under decking. Joist tape is cheap insurance that can add a decade or more to your substructure life.
Frequently Bought Together
Accessories that pair well with joist protection for a complete installation.
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Call 1-844-674-4455