Can I have a little advice please?

The joists run length ways, so naturally, I board across the joists.

However, the joists finish about 300mm from each side of the garage.

How should I support the board? Add a batten all around the edge?


  • Do you have a photo? I assume you're stating that edge without support is the edge parallel to the joists...
    – tahwos
    Dec 28, 2019 at 23:05

1 Answer 1


Yes, add a batten to support any free edges.

Then plan the panel layout to maximize the use of panels ie have the fewest joints possible and the shortest total length of joints.

  • Thanks. Annoyingly, the length of the room will be about 2500 ish, so hopefully, not too much waste.
    – Paul
    Dec 28, 2019 at 19:27
  • you can order sheets in any length (up-to the length of the delivery truck). sometimes that's preferable to accepting the retail offerings.
    – Jasen
    Dec 28, 2019 at 22:56
  • 1
    @Jasen that seems location specific info - 8 by 4 sheets is why the most popular van was the transit for many years...
    – Solar Mike
    Dec 28, 2019 at 23:05

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