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Suitable screws for the job

Comments

  • #2
    fiacha
    Registered Users, Registered Users 2 Posts: 792 ✭✭✭fiacha


    What is your definition of a small lean to roof ? :)
    Can you give some details of the planned roof dimensions and construction materials etc ?

    Many of the concrete screw / bolts have a minimum hole depth in order for it to hold as designed. I think expansion bolts are more flexible in that regard.

    First step is to get the drill out and see if the blocks are solid or cavity and work from there.


  • #3
    GinSoaked
    Closed Accounts Posts: 1,049 ✭✭✭GinSoaked


    Personally I don't think I'd use those in hollow blocks. The reason is there is a good chance that when you drill the hole you'll blast out a chunk of the block where the bit breaks through into the hollow cavity. In which case there may not be a lot of hole left of the right size for those particular bolts to grip on.

    Think I'd use M8 or M10 frame fixers but thats what I always use :D

    When I can get them I rather like these frame fixers that are for windows. They open up well inside a cavity.


  • #4
    g6fdyotp5nj2l7
    Closed Accounts Posts: 436 ✭✭g6fdyotp5nj2l7


    fiacha wrote:
    What is your definition of a small lean to roof ? Can you give some details of the planned roof dimensions and construction materials etc ?

    It's to cover a small patio 10ft by 6ft

    fiacha wrote:
    First step is to get the drill out and see if the blocks are solid or cavity and work from there.

    Haven't got a chance to confirm but I'm almost certain they're cavity blocks


  • #5
    g6fdyotp5nj2l7
    Closed Accounts Posts: 436 ✭✭g6fdyotp5nj2l7


    GinSoaked wrote:
    When I can get them I rather like these

    Would you consider those good enough to hold up the wall plate the roof will rest on ?


  • #6
    GinSoaked
    Closed Accounts Posts: 1,049 ✭✭✭GinSoaked


    Courtney Quiet Sty wrote: »
    Would you consider those good enough to hold up the wall plate the roof will rest on ?

    8 or 9 along 10 foot I don't see why not?

    But you still need to do one test hole to see how it goes. Some holes will be into the cavity and the odd one will be into more of the meat of the block.


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  • #7
    g6fdyotp5nj2l7
    Closed Accounts Posts: 436 ✭✭g6fdyotp5nj2l7


    GinSoaked wrote:
    But you still need to do one test hole to see how it goes. Some holes will be into the cavity and the odd one will be into more of the meat of the block.


    Bit hit and miss is it not though ?


  • #8
    GinSoaked
    Closed Accounts Posts: 1,049 ✭✭✭GinSoaked


    Courtney Quiet Sty wrote: »
    Bit hit and miss is it not though ?

    What other choice do you have? If you can see where the blocks are then you can pick the best locations to drill. Even if most of the holes don't have much depth those window frame fixers should hold well enough that you could pull the wall over before the wall plate comes off.


  • #9
    kitser
    Registered Users, Registered Users 2 Posts: 137 ✭✭kitser


    What will the lean to roof be- glass, polycarbonate, tiled? If it's lightweight, I'd use 7.5mm easidrive conctrete screws 80 or 100mm max length. Drill 8mm pilot holes in timber. Drill 6mm holes in wall and drive home screws. Buy decent large washers to stop screw from eating into timber. Drill every 300mm approx. Whatever fixings you use - you'll have no problems if you use an sds drill and good drill bit. Non sds or cheap drill bits will make holes bad for screws to thread into.


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