Deck joist flashing tape is used to help protect your deck’s substructure — commonly made with pressure treated lumber — from moisture. As an organic material, lumber is highly vulnerable to mold, mildew, and rot, especially where fasteners penetrate joists or on stair stringers. Using tape on your joists is an effective and affordable way to help protect your deck’s wood substructure. Keep in mind, non-lumber alternatives for deck substructures exist as well. TimberTech Aluminum Framing is not susceptible to rot like wood and therefore doesn’t require joist tape.
A healthy substructure is essential for the overall health of your deck and benefits you by:
- Saving you on future maintenance/replacement costs.
- Increasing the anticipated life of your deck.
- Improving your deck’s structural integrity so you can enjoy your deck, worry-free, year after year.
What Is Deck Joist Flashing Tape?
A common type of deck joist flashing tape is water-resistant butyl adhesive, which is used to help resist moisture from penetrating your deck’s frame. While TimberTech deck boards are moisture-resistant, when traditional lumber is used for the joists and ledger, your substructure is susceptible to water damage.
Should I Use Joist Tape?
Yes. When traditional lumber is used for a deck substructure, protective tape for your joists is a must to help protect your deck’s substructure from weathering and moisture.
Benefits of Deck Joist Flashing Tape
Deck joist flashing tape helps protect the tops of joists from moisture intrusion. This helps protect lumber from rot, which can extend the life of the deck’s substructure.
TimberTech composite decking is designed for durability and lasting beauty, with our TimberTech Advanced PVC line boasting a Limited Lifetime Product Warranty. When you invest in high-quality composite decking designed to last a lifetime, it’s essential to help extend the life of your substructure as well.
Not Sure How to Space Your Joists? Find out all you need to know about joist spacing and blocking including the tools and materials needed, installation steps, and more. DIY: JOIST SPACING
How Do I Use Deck Joist Tape?
If you’re building your own composite deck, applying tape should be one of the easier steps to complete.
Some best practices for applying the tape to your joists include:
- Apply the tape to clean, dry lumber.
- Use firm pressure (preferably with a hand roller) to ensure adequate adhesion.
- Try to avoid wrinkles or air bubbles.
Joist and Flashing Tape Helps Extend the Life of Your Deck
TimberTech® PRO-Tac™ Flashing and Joist Tape is designed with durability in mind, to help make your deck’s lumber substructure last longer.
Deck Joist Tape Designed to Last Longer
TimberTech PRO-Tac Flashing and Joist Tape helps provide protection for your deck’s substructure.
- Helps extend the life of lumber decking substructures
- Helps prevent water penetration
- Helps protect lumber from rot
- Flexible self-adhesive with durable PET liner
- All weather
Now that you understand just how important deck joist flashing tape is to your deck build, when lumber is used as the substructure, don’t omit it. Grab TimberTech PRO-Tac Flashing and Joist Tape to help protect your deck’s frame with the best of the best.
As you know, building a deck takes so much more than proper application of tape to your joists. Working with a TimberTech-registered contractor helps ensure you get a safe, beautiful, and long-lasting deck that you can enjoy year after year.
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