Deck Joist and Beam Flashing Tape

PROTECT YOUR DECK AT MINIMAL COST

Maximize your deck’s life expectancy with SPAX® Deck Joist and Beam Tape.

To get an idea how much joist tape you need for your deck project use our calculator.

A typical deck warranty will last 25 or more years—but without a protected deck substructure, splitting and rotting can occur at around 8 to 10 years, according to research by decks.com. SPAX® Deck Joist and Beam Tape optimizes the life of the deck and ensures a long-lasting, professional installation by protecting fasteners from water damage.

The flexible, waterproof tape is specially engineered with advanced synthetic adhesive to seal off fasteners, joists and beams from moisture. This high-strength, durable barrier prevents premature wood rot while allowing joists to breathe, so that your foundation lasts as long as the deck. And with a UV-resistant engineered film facer, it’s the only deck tape with UV resistance up to 10 years.

SPAX® Deck Joist and Beam Tape is part of our line of complete decking solutions, making professional, high-quality installation easy.

• Compatible with most deck materials, including pressure treated wood and composite products
• Protects deck substructure from rot and decay
• Helps deck screws hold longer and stronger
• Seals fasteners, preventing moisture penetration
• Eliminates splitting between freeze and thaw
• Provides a barrier between wood and galvanized metal
• Black to hide joists and drillable for ease of use
• Moisture-resistant, slip and tear resistant
• Materials warranty for a period of 10 years
• Pliable—guaranteed not to crack, harden or shrink due to temperature
• Sound dampening, reducing board squeaks
• Apply to horizontal and vertical surfaces including all joists, beams, stair stringers, ledger board and other surfaces
• Stock available in 2 widths: 1-5/8” (4.13cm) Joist Tape for joists and 3-1/4” (8.26cm) Beam Tape on all double joists and beams

SPAX Deck Tape Technical Data Sheet (300 KB)