What is Decking Tape & How Does it Work?

Decking tape, also known as joist tape or flashing tape, is an essential component in the construction of a long-lasting and weather-resistant composite deck. This adhesive tape is designed to protect the timber substructure of your deck from moisture, rot, and weathering, ultimately extending the life of your deck frame. In this comprehensive guide, we’ll dive into the details of what decking tape is, how it works, and why it’s crucial for maintaining the integrity of your composite decking.

What is Decking Tape?

Decking tape, or joist flashing tape, is a self-adhesive tape specifically designed to seal and protect the timber joists and substructure of your deck. It is typically made from a strong polymer acrylic adhesive that creates a permanent bond with the timber, effectively sealing out moisture and preventing rot. Deck tape is available in various widths, with 50mm and 65mm being the most common sizes.

At Ecoscape, we offer Deck Tape, a high-quality, non-butyl self-sealing tape manufactured from a massively strong polymer acrylic adhesive. This tape is designed to protect any timber decking substructure, ensuring a completely waterproof and weatherproof seal that adds to the life of your deck frame.

How Does Decking Tape Work?

Decking tape works by creating a barrier between the timber joists and the elements, preventing moisture from penetrating the wood and causing rot or decay. The tape is applied along the top of the joists before the deck boards are installed, ensuring that any water that seeps through the gaps between the boards will not come into direct contact with the timber substructure.

The adhesive on the tape forms a permanent bond with the timber, creating a seal that lasts for the lifetime of your deck. This bond is so strong that our Walther Strong Deck Tape comes with a 25-year guarantee, giving you peace of mind that your deck frame is well-protected.

Benefits of Using Decking Tape

  1. Prevents Rot and Decay: By sealing out moisture, decking tape helps prevent rot and decay in the timber joists, extending the life of your deck frame.
  2. Protects Against Weathering: Deck tape acts as a barrier against the elements, protecting your deck substructure from weathering caused by rain, snow, and sun exposure.
  3. Maintains Deck Integrity: By keeping the timber joists dry and free from rot, decking tape helps maintain the structural integrity of your deck, ensuring that it remains safe and stable for years to come.
  4. Easy to Install: Applying deck tape is a simple process that can be done by any DIY enthusiast. Simply clean the surface of the joists, cut the tape to the desired length, and press it firmly onto the timber.
  5. Compatible with Various Timber Treatments: Our Walther Strong Deck Tape has been tested with all timber treatments, including galvanised fixings and treated timber, ensuring a strong and lasting bond.

How to Apply Decking Tape

  1. Ensure that the surface of the timber joists is clean, dry, and free from debris.
  2. Cut the deck tape to the desired length, allowing for a slight overhang on each end of the joist.
  3. Peel back the protective backing on the tape and align it with the top of the joist.
  4. Press the tape firmly onto the timber, using a roller or your hand to ensure a strong adhesive bond.
  5. Repeat the process for all joists, ensuring that the tape is applied in a continuous strip along the entire length of each joist.
  6. Once the tape is applied, you can proceed with installing your composite deck boards as planned.

Decking Tape and Composite Decking

While composite decking is highly resistant to moisture, rot, and weathering, it’s still essential to protect the timber substructure that supports your deck. By using decking tape in conjunction with our advanced composite decking products, you can ensure that your entire deck structure remains strong, stable, and weather-resistant for decades to come.

Our Deck Tape is specifically designed to work seamlessly with our range of composite decking boards, including our popular Forma, Clarity, and Linea collections. By combining the protective qualities of deck tape with the durability and low-maintenance nature of composite decking, you can create a beautiful and long-lasting outdoor space that you’ll enjoy for years to come.

For Professional-Grade Composite Decking Tape, Shop with Ecoscape Today

Decking tape may seem like a small detail in the grand scheme of building a composite deck, but its importance cannot be overstated. By sealing out moisture and protecting the timber substructure from the elements, deck tape plays a crucial role in maintaining the integrity and longevity of your deck frame.

So, when planning your next composite decking project, don’t forget the importance of decking tape. By investing in this simple yet essential component, you’ll be taking a significant step towards creating a beautiful, durable, and low-maintenance outdoor space that you and your family can enjoy for years to come.

Gary is the founder and CEO of Ecoscape UK. Gary graduated from Liverpool JM University in 2007 with a 2:1 in Economics. A passion for innovation, design and sustainability, Gary has put to market numerous wpc products/systems, some of which have UK and European registered designs. Outside of work Gary enjoys spending time with his family, the great outdoors and watching Manchester United.


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