While other subframe materials are available to installers, NeoTimber’s composite joists are purpose built to work with our decking boards. This solution is excellent for installing a low-lying decking subframe that sits directly onto a solid, flat base.
While the installing composite joists video outlines each step in detail, we thought we would outline the key tips below:
- Incorporate a decline of 1% to your base in order to aid with drainage.
- Lay your joists at right angles to the direction of your boards.
- Install your composite joists at 250-350mm spacings.
- Leave an 8mm gap where joists meet at joins.
- Double-joist the areas you expect deck boards to meet at joins.
- Attach the joists to your concrete base using a 60mm screw; pre-drill and countersink the material to avoid cracking.
- When attaching the composite joist to the concrete base, be sure to begin screwing at least 70mm in from the joist edge.
- Be sure to also leave an 8mm gap from the joist to any solid surfaces, such as a brick wall.
Also part of the “How-To Installation Videos” series…
Need Further Support or Advice?
If you’ve still got questions that have not been answered here, or you would like additional advice,
support or assistance then please give one of our friendly experts a call and we’ll be happy to help.
Just give us a call on 01509 323 170.