Neowall Black Keel Joists
Neowall Black Keel Joists provide the essential structural support required for a strong and stable composite decking installation. Designed to form the foundation of your decking subframe, these joists help evenly distribute weight and maintain the structural integrity of the deck.
By creating a reliable base for decking boards, keel joists help prevent movement, sagging, and long-term structural issues. Their durable construction ensures they perform well in outdoor environments while supporting the decking system effectively.
With a size of 5000mm × 40mm × 25mm, Neowall Black Keel Joists are suitable for a wide range of decking layouts and installations, providing a dependable foundation for long-lasting outdoor decking projects.
25-Year Warranty
Neowall outdoor decking products are built for durability and long-term performance. Our composite decking boards are backed by a 25-year warranty, giving you confidence in the quality and reliability of your decking.
Learn more about our warranty coverage here: https://neowall.co.uk/pages/warranty
Experience the convenience of swift order fulfillment with our top-notch Shipping services.
After installation, you may notice a slight lightening of the product’s colour. This is a natural part of the weathering process, caused by initial exposure to sunlight. This temporary change typically settles within 6 to 12 weeks. Once this period has passed, the product’s colour will remain stable and will not experience further discolouration under normal conditions.
Why choose our Composite Decking?
Real Homes Real Results
Before
After
Frequently Asked Questions
Composite decking is a durable material made from a blend of recycled wood fibers and plastic. It’s designed to provide the appearance of wood with increased durability and low maintenance.
We offer a range of accessories, including edge boards, starter clips, and finishing trims to complete your outdoor deck.
Ensure the substructure is solid, level, and dry, with the subframe securely fixed. Then follow our step-by-step installation guide to help you through the process.
You can reach out to us directly at +44 7883 080520 or via email at info@neowall.co.uk We’re happy to answer any questions about our products, offer advice, and even provide a free, no obligation quote for your project.
With proper care, composite decking can last 25 years or more, offering excellent long-term value. Our products are backed by our 25 year warranty.
As Loved by You
Superior Experience
Sep 30, 2025Great people to do business with Great people to do business with, I highly recommend Neowall. Purchased there cladding, it looks great and was easy to fit. Excellent communication and prompt delivery. I would certainly use this company again.
Jeff Munroe
Superior Experience
Apr 8, 2025Ordered 47, 5mtr decking boards up to Scotland. Excellent quality, good delivery even left a spare board just incase any damage. This will not be my last order, as a landscaper I'm always looking for a reliable supplier, with good delivery times and reasonable prices, definitely found it here, well done guys, keep it up.
robert crossan
Great quality product...
Jan 16, 2025Great quality product, usually fast delivery (a few days), good price and free delivery. We have ordered on 3 separate occasions and each time the delivery, although usually fast, has been unannounced!We have used the Neowall Acoustic Panels on our kitchen ceiling and on a Media Wall - looks really good.
Martin Whiting
Great experience
Aug 8, 2024Great experience. Didn’t originally deliver to my area but and they sorted the situation out right away! I also asked if I could pay cash on delivery which they were more than accommodating for. Products were just as shown and described and I’m over all really happy. Especially for price and quality.
Adelle Djaiz
Fantastic product unbelievable…
6 days agoFantastic product unbelievable communication with neowall fast delivery. As a house builder I recommend this product 100% quality products
Mr Wardell
Staff very friendly & helpful my…
Oct 2, 2025Staff very friendly & helpful my cladding was delivered when I was told & any problems was resolved easily. Thank you
Joy Ellis
