If you’re planning to build or enhance your outdoor living space with a deck, you’ve likely encountered the term “joist tape”. But what is it, and is it worth investing in? Let’s dive into the details and explore why joist tape for decking could be a vital component in ensuring your deck stands the test of time.
What Exactly is Joist Tape for Decking?
Deck joist tape, also known as flashing tape, is a robust and waterproof tape designed to protect your deck’s substructure from the ravages of water. Wet joists can lead to mold and, ultimately, rot—a sure recipe for a shortened deck lifespan. Joist tape acts as a barrier, preventing water from penetrating the deck frame and causing damage.
The benefits of using joist tape for decking are numerous:
Extended Deck Lifespan: By shielding your joists, beams, and rim joists from moisture, joist tape helps ensure your deck remains in prime condition for longer.
Moisture Protection: It creates a tight seal around your deck hardware, preventing water from seeping into critical areas.
Enhanced Durability: Deck screws and fasteners hold stronger and longer when joist tape is applied, reducing the likelihood of premature wear and tear.
Cost Savings: By minimizing the need for repairs, joist tape can save you money in the long run.
Types of Joist Tape for Decking
When shopping for joist tape, you’ll encounter various types, each with its own set of advantages. Two popular options are butyl and asphalt tape.
Butyl Tape: This rubberized, waterproof tape is highly adhesive and forms a strong, flexible barrier. It adheres well to wet surfaces and is thin enough to fit around deck hardware without bulking. Trex Protect, a butyl tape with a 25-year warranty, is a prime example of this type. It’s easy to install and provides long-lasting protection.
Asphalt Tape: Made from asphalt and petroleum, asphalt tape is another durable option for protecting your deck joists. It’s easy to use and offers multiple benefits, including wood protection from moisture.
Is Joist Tape for Decking Worth It?
Absolutely! The minimal investment in joist tape can provide peace of mind and years of protection for your deck. Considering the cost of a deck—a 400 sq. ft. composite deck can range from 12,000 to 24,000, while a wood deck can cost between 10,000 and 17,000—the $100 or so you’ll spend on joist tape is a drop in the bucket.
Moreover, research shows that over 90% of deck substructures begin to split and rot within 8 to 10 years. By using joist tape, you can significantly extend the life of your deck’s substructure, ensuring that the boards supported by it remain in good condition for decades.
How to Use Joist Tape for Decking
Applying joist tape is a straightforward process that can significantly enhance your deck’s durability. Here’s a step-by-step guide:
Prepare the Surface: Ensure the joist surface is clean, dry, and free of debris.
Apply the Tape: Remove the backing from the joist tape and apply it directly to the surface. Press firmly to ensure a good seal.
Trim to Fit: Use a utility knife to cut the tape to the desired length, covering all horizontal and vertical surfaces.
When installing butyl joist tape, it’s essential to work in temperatures that won’t cause the tape to ooze excessively. Press the tape firmly onto the wood as you go, and make small diagonal slits at the edges to allow the tape to fold over neatly.
What to Look for When Shopping for Joist Tape
When selecting joist tape, consider the following factors:
Material: Butyl tape offers superior performance in terms of adhesion, stain resistance, and temperature range.
Ease of Installation: Butyl tape requires minimal trimming and overlaps, making it quicker and easier to install.
Thickness: Choose a tape that fits snugly around your deck boards without being too thick or too thin.
Price: While you want to save money, don’t sacrifice quality. Remember, joist tape is like an insurance policy for your deck.
Reputation: Compare brands and read reviews to find the best joist tape for your needs.
The Future of Deck Joist Protection
While joist tape is still a valuable tool for many homeowners, advancements in decking joist materials have led to options like wood plastic composite and aluminum joists that offer excellent waterproof performance without the need for additional protection. However, for those who prefer traditional wood joists, joist tape remains an essential investment in deck longevity.
At Feelingwood, we recommend considering wood plastic composite or aluminum joists for your deck. Although they may cost more upfront, their durability and resistance to rot make them a worthwhile investment and allow you to enjoy a safe, comfortable deck for decades.
