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Discuss Jackoboard fixing spacing in the DIY Tiling Forum area at TilersForums.co.uk.

  1. DavidJ

    DavidJ Active Member

    Location:
    Cambridge
    I am fixing 12mm Jackoboard (strictly Contract board from CTD) to a studwall with 600mm studs. The board is 2400x600mm and I am laying the long edge horizontally along several studs.

    I have fixed a screw into each stud along the horizontal edges (600mm centres) and also have fixed noggins 300mm up from the edge and attached a screw into this at 300mm offset to the edge screws. Please see that attachment for the stud pattern per 600mm square.

    While the centre of the board is perfectly solid, if I grab the edge in the middle between two studs it is quite flexible which doesn't seem right.

    The instructions I have found online seem to require a minimum of 5 screws per 1 square metre. The pattern I have used definitely exceeds this.

    Can someone who has used these boards on a stud wall share what pattern of fixings they used?

    Spacing.png
     
    Last edited: May 4, 2018
  2. Localtiler

    Localtiler Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    Yorkshire
    You need 20mm board for 600mm stud spacing David,
     
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  3. 3_fall

    3_fall Administrator. Staff Member Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    SW London
  4. PaulSmith

    PaulSmith Professional Tiler

    12mm Jacko requires 300mm upright studding plus noggins.
     
  5. DavidJ

    DavidJ Active Member

    Location:
    Cambridge
    Thank you. The guy at CTD said 12mm would be ok for 600mm studs. I should have double checked on here.
     
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  6. PaulSmith

    PaulSmith Professional Tiler

     

    Attached Files:

  7. DavidJ

    DavidJ Active Member

    Location:
    Cambridge
    Thanks for the Jackoboard instructions PaulSmith. I'm going to get some 20mm board.

    Comparing the Jackoboard and Dukka board instructions, the Dukka board says its ok to share fixings across the edge of two boards but the Jackoboard requires the edges of both boards to have their own screws (offset 50mm). This would require the studs to be over 50mm wide. My (existing) studs are a shade under 40mm.

    Would the Dukka board method work on these boards?
     
  8. 3_fall

    3_fall Administrator. Staff Member Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    SW London
    It’s more about crushing the edges.
    Tighten cautiously, and they’ll be fine I’m sure, although it’s not something I practice.
    You can always help matters by using a PU adhesive between the boards on the edges as you join them.
    The more fixings the better.
     
  9. DavidJ

    DavidJ Active Member

    Location:
    Cambridge
    Speaking of not crushing the edges, do you leave the washers proud of the surface or let them pull into the board slightly so they're flush with the board surface?

    Edit - found the answer on the instructions you posted:
    "The insulation board discs must be sunk to the level of the board surface." so they have to crush the board a little
     
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  10. 3_fall

    3_fall Administrator. Staff Member Trusted Advisor Professional Tiler JOTM Winner Top Contributor

    Location:
    SW London
    If you’re not heavy handed, it’s easy enough to pull them in slightly.
     
  11. PaulSmith

    PaulSmith Professional Tiler

    You can fix both boards with a fixing in the centre of stud. It shown on jackon installation videos.

    jacko_paulsmith.jpg
     
  12. PaulSmith

    PaulSmith Professional Tiler

    edit: moderation, please delete.. duplicate
     
    Last edited: May 5, 2018
  13. DavidJ

    DavidJ Active Member

    Location:
    Cambridge
    Brilliant. I'll go with that pattern from the video. Luckily I'd only wasted one board before realising it wasn't right and I'm exchanging the remaining boards for 20mm.
     
  14. PaulSmith

    PaulSmith Professional Tiler

    If space isn't an issue.. but 12mm is fine with the correct studding. 3 x 2 CLS maybe cheaper then exchanging for 20mm Jacko. Let us know how you get on ;)
     
  15. DavidJ

    DavidJ Active Member

    Location:
    Cambridge
    Yes CLS is quite a bit cheaper but for me it would be a lot more labour intensive. It's easier just to get the right boards and not give myself more work to do!
     
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