[Please Help] Need to lift chipboard flooring to address pipes knocking

Discussion in 'Plumbers' Talk' started by RipGroove, May 30, 2016.

  1. chippie244

    chippie244 Super Member

  2. RipGroove

    RipGroove Member

    Thanks! And should I still grip fill the board to the joists?
     
  3. NoOhmToGoTo

    NoOhmToGoTo Screwfix Select

    No! Use the stuff Chippie recommended. Gripfil indeed.
     
  4. RipGroove

    RipGroove Member

    So use this stuff on the T&G's and the tips of the joists?
     
  5. chippie244

    chippie244 Super Member

    Use it on the t&g and on top of the joists.
     
  6. RipGroove

    RipGroove Member

    Perfect thanks :)
     
  7. chippie244

    chippie244 Super Member

    It expands like buggery and will turn your hands black so wear latex or vinyl gloves and have some wipes ready.
     
  8. RipGroove

    RipGroove Member

    OK thanks!
     
  9. RipGroove

    RipGroove Member

    And this is with me treading lightly...

     
  10. RipGroove

    RipGroove Member

  11. BMC2000

    BMC2000 Active Member

    Please tell me more about what a clearance hole is?

    The screws I used don't need a pilot hole if that's the same thing?

    What problems are in store for me saying my carpenter advised to use full thread screws on my floor? All appears to be in good order up there1
     
  12. RipGroove

    RipGroove Member

    From what I gather if your using full thread screws then your chipboard should be drilled out larger than the size of the screw so in effect the thread going through the chipboard is in fresh air.

    I've just started my floor and been using these with no clearance hole and they are working perfectly!

    http://www.screwfix.com/p/spax-flooring-screws-4-5-x-60mm-300-pack/88716
     
  13. BMC2000

    BMC2000 Active Member

    That's what I thought, still can't see how the screws I use that don't need pilot holes should not be used on this.
     
  14. RipGroove

    RipGroove Member

    I guess because in theory you can't pull 2 pieces of wood tight together on the same thread (in theory that is). The only way to truly do it is to either pilot the top piece of wood or use the screws I linked to. Using a screw with a big shoulder also won't work as over time the chipboard could come loose and rub up and down that shoulder, and start creaking.
     
    BMC2000 likes this.
  15. RipGroove

    RipGroove Member

    Just to add I'm no carpenter but I am an Aerospace CNC machinist and I know you can bolt 2 bits of metal together if they are both threaded. Same applies to wood, only wood 'gives' a little to give the impression that it's worked.
     
  16. chippie244

    chippie244 Super Member

    It's called "Jacking off"
     
  17. RipGroove

    RipGroove Member

    Well there you go, it has a name! :)
     
  18. BMC2000

    BMC2000 Active Member

    RipGroove thanks for the explanation, that makes sense
     
  19. RipGroove

    RipGroove Member

    No problem.
     

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