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Decking Joist Tape

Castle Joist Tape

Castle Joist Tape is a non-butyl self-sealing tape manufactured from a massively strong polymer acrylic adhesive, which gives a completely waterproof and weatherproof seal.

Available in rolls of 50mm x 20m.

With a permanent adhesive bond for 50 years and a 25-year guarantee, this greatly adds to the life of your deck frame. Tested with all timber treatments.

Suitable to be used with both traditional timber decking and also more advanced composite decking, Castle Joist Tape will protect any timber decking substructure.  When using a composite deck board, more of the moisture will be absorbed into the substructure as it will drain off the deck boards.

Higher amounts of moisture will mean that the frame will rot faster if not sealed properly. What we offer with our product is the following:

  • Watertight
  • Air- and smoke-tight
  • Easy release
  • Stickiness
  • UV-stable
  • Self-sealing
  • Tape can be easily overlapped without adding any significant height which could interfere with the deck board heights
  • Easy to slide boards along taped joists when installing
  • If screws are removed, no residue is left on the screw
  • The tape doesn’t stick to itself on the adhesive side – no waste
  • Upgraded sustainable materials – Like composite decking, we are now using sustainable materials in Deck Tape. The flat fibre strand laminated webbing layers are manufactured from self-reinforced thermo polymers which gradually increase in strength over time and are 100% recycled!
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Sarah M
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Once again, a great company to deal with, helpful and reasonably priced. Highly recommend
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Charlotte
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Impeccable service from this company! From start to finish they have showed patience, kindness and honesty throughout. As for the product.......beyond our expectations!! After almost a year of deliberation and with limited options due to placement we decided on the grassflex tiles and 100% made the right choice. Great quality! Thank you
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Pam Jordan
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Just had a 15m garden wall built, topped by porcelain coping stones. Customer service was wonderful, and Fraser was so incredibly quick to answer any questions l asked. Samples were sent first and ordering was easy. Thank you Fraser for all your help. A great company to deal with!
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J
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Absolutely amazing service from start to finish! Fraser was super helpful, replied promptly to all my queries, delivery was quick and smooth. Trully great team providing best service, was kept updated on my delivery which was super fast, would definitely recommend this company! Thank you Fraser. Kind Regards Jara
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Carole McGregor
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Fabulous service from this company and Martin in particular who took me through the order process step by step. So easy to deal with. Very happy with the copes and pier caps ordered. Great quality and speedy delivery. Would definitely use again.
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Lucy Zorina
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Absolutely amazing customer service from Fraser Brown! We had a delivery of outdoor tiles this morning, and our construction team was struggling to figure out how to use the levelling discs supplied. Fraser immediately stepped in and provided a direct WhatsApp number so the team could send videos and speak to him directly. The issue was resolved within five minutes. A huge thank you to Fraser for such responsive and hands-on support — truly appreciated!
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Truman Burbank
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Great products at good prices. Highly recommend.
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L McGinness
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A great experience with Castle Composites! We purchased the EPDM Rubber Tiles in ‘Sunburst’ for the kids’ play area section of our garden. Fraser was a wonderful help - from the first phone call enquiring about the product, showing us samples at the warehouse, liaising throughout the ordering and production process (and for helping with a later change to increase our order quantity within the same batch), to ensuring smooth delivery, Fraser’s customer service was fantastic and very much appreciated. The play area is now fully installed in our garden and we are delighted with the finished product. Thank you!
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Ernest Machin
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Excellent service from a great company with fantastic staff and a wonderful product. We have just used Castleflex tiles for our large patio and are very pleased with the end result. They look great and were easy to lay.