Long thin screws to secure insulation + tilebacker board to brick with wall plugs?

Discussion in 'Building' started by JP_, 13 Dec 2021.

  1. JP_

    JP_

    Joined:
    17 May 2012
    Messages:
    9,300
    Thanks Received:
    578
    Country:
    United Kingdom
    I have some washers to help hold insulation boards in place, but the 6mm x 120mm screws (wickes multi purpose) I bought are too bit - they go in but the screw head is too large.

    I think I need something like a 5mm 120mm screw, but not finding many options. Can anybody recommend one?

    Although, maybe a better option is to get something bigger, like these Load Spreading 60mm Polypropylene washers - I assume the screw head will sink a little into the insulation.

    It is for 50mm Kingspan + 10mm STS tile backer board, (plus about 10mm gap/adhesive foam) to go into brick. Then it will be tiled, so obviously needs to be pretty flat, maybe flatter than if rendering (eg on external insulation)

    I am wondering if I can just use a 4.8 x 120mm drywall screw - but will these securely fit in a wall plug?

    These don't work:
    IMG_20211213_223728198.jpg
     
  2. Sponsored Links
  3. ^woody^

    ^woody^

    Joined:
    3 Sep 2006
    Messages:
    35,879
    Thanks Received:
    4,856
    Location:
    West Mids
    Country:
    United Kingdom
    You only need literally a couple of screws to hold the insulation before you fit the board. And those screws dont need washers.

    If you feel the need you can cut plastic from a food carton or suchlike, or if you have steel banding use that.
     
  4. JP_

    JP_

    Joined:
    17 May 2012
    Messages:
    9,300
    Thanks Received:
    578
    Country:
    United Kingdom
    Ended up getting these, nice and solid.

    IMG_20220122_171648405.jpg

    IMG_20220122_171707753.jpg
     
  5. Godwasaplasterer

    Godwasaplasterer

    Joined:
    15 Oct 2021
    Messages:
    2,114
    Thanks Received:
    298
    Country:
    United Kingdom
    the boards do.
     
  6. phatboy

    phatboy

    Joined:
    22 Jan 2012
    Messages:
    2,216
    Thanks Received:
    259
    Location:
    Jersey
    Country:
    United Kingdom
  7. Sponsored Links
  8. JP_

    JP_

    Joined:
    17 May 2012
    Messages:
    9,300
    Thanks Received:
    578
    Country:
    United Kingdom
    Drywall screws would / should be ok, but they need to be at least 12cm. The ones i found seem perfect for the job.
     
  9. Godwasaplasterer

    Godwasaplasterer

    Joined:
    15 Oct 2021
    Messages:
    2,114
    Thanks Received:
    298
    Country:
    United Kingdom
  10. wgt52

    wgt52

    Joined:
    25 Apr 2016
    Messages:
    1,455
    Thanks Received:
    278
    Country:
    United Kingdom
    Are you tiling a bathroom? If so then you should be using Stainless Screws; length long enough to be in the wall structure a minimum of 60mm (if the plaster is still on the wall then it's 60mm into the brick).
    The metal disks are much better to use than plastic ones. The screw head will be 'lost' in the tile adhesive.
    I reckon on 20 screws per board spaced evenly.
     
  11. Godwasaplasterer

    Godwasaplasterer

    Joined:
    15 Oct 2021
    Messages:
    2,114
    Thanks Received:
    298
    Country:
    United Kingdom
    why stainless?
     
Loading...

Share This Page