Deckorators Joist & Flashing Tape
Deckorators Joist & Flashing Tape is a black protective tape for joist tops, rim joists and ledgers that shields deck framing from water and seals around screw holes.
About Deckorators Joist & Flashing Tape
Water sitting on top of a joist is one of the main reasons deck framing rots early. Deckorators Joist & Flashing Tape goes on joist tops, rim joists and ledgers to shield the wood from water. It also seals screw holes against moisture and helps deck screws hold.
Two widths are available, both in 50 ft rolls: 1-5/8 in for single joists and 3-1/8 in for double joists and beams. The tape works over wood or composite deck understructures, and Deckorators recommends ProWood pressure-treated lumber for the framing. It also pairs with the Deckorators Sleeper system when decking over a concrete patio.
Deckorators guidance calls for about 2 in of clear space between joist bottoms and grade for ventilation, and a 1/4 in gap between long edges of deck boards. Check local code for footings. For a quote, estimate total linear feet of single joists, doubled joists and beams, rim and ledger.
Colors, sizes and specifications
Colors and finishes
- Black
Sizes and configurations
- 1-5/8" x 50' (single joist)
- 3-1/8" x 50' (double joist/beam)
Models
- Single-Joist
- Double-Joist/Beam
Features
- Applies to tops of joists, rim joists and ledgers
- Protects wood from water damage
- Increases holding power of deck screws
- Moisture and rot barrier around screw holes
Accessories and works with
- ProWood pressure-treated lumber (recommended understructure)
- Deckorators Sleeper system
Best for
- Protecting joist tops, rim joists and ledgers
- Shielding screw holes from moisture
- Decking over concrete patios with sleepers
Installation notes
- Keep a clear 2" space between joist bottoms and grade.
- Leave a 1/4" gap between long edges of deck boards.
- Attach composite decking to structural joists, not over existing deck or porch floors.
- Check local code for footing requirements.
Frequently asked questions
Can I install over a concrete patio?
Yes, with the Sleeper system, or 2×6 boards on edge for wood-plastic composite, with shims to keep 2" clearance above the concrete.
Deckorators Joist & Flashing Tape photos
One product or the whole package
Order this on its own, with a few related products, or with everything else for the project. One itemized quote, shipped to all 50 states. Need someone to install it? Find an installer serving your area.
Request a quote for Deckorators Joist & Flashing Tape
Send plans, measurements, or photos and we will prepare an itemized quote. You can also call us with questions.