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drilling large holes in stone walls

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  • 13-09-2007 11:07am
    #1
    JohnBoy
    Registered Users Posts: 2,343 ✭✭✭


    I need to make some 5 inch holes through the walls of our house. its a stone wall with cement render.

    Would i be better off using a 5 inch core drill or making a circle of small holes and joining them up.

    I'm not that concerned about time, only about making a clean hole from the outside and not dislodging a large stone and brining a chunk of plaster with it.


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    #2
    10-10-20
    Registered Users Posts: 7,165 ✭✭✭10-10-20


    How thick is the wall?


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    #3
    IRISH RAIL
    Closed Accounts Posts: 1,097 ✭✭✭IRISH RAIL


    diamond core bit if you want a neat job thats the man


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    #4
    foxhunter
    Closed Accounts Posts: 468 ✭✭foxhunter


    I think sam hire rent a machine for exactly that job it sticks to the wall and you just turn it on and it does the rest .


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    #5
    ircoha
    Closed Accounts Posts: 2,290 ✭✭✭ircoha


    foxhunter wrote:
    I think sam hire rent a machine for exactly that job it sticks to the wall and you just turn it on and it does the rest .

    some comments:
    this rig, if rentable I believe is water cooled which will require the holes to be drilled from the outside.
    It may also only be TCT teeth and not diamond

    I would look at the cost of getting someone to do it for you as my experience with renting this sort of kit is that they charge you for broken or badly worn TCT teeth which can be a bit messy. Diamond bits are rented on the basis of the amount of actual wear.

    Depending on the type of stone, eg granite, the wear could be a lot.

    see http://theholecompany.ie/index.php?option=com_content&task=view&id=15&Itemid=39


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    #6
    10-10-20
    Registered Users Posts: 7,165 ✭✭✭10-10-20


    My take on this would be that if the wall is thick and you use the multiple hole method, you aren't going to be able to keep the drill bit level for all of the holes, meaning a very messy job.


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    #7
    Heinrich
    Closed Accounts Posts: 1,577 ✭✭✭Heinrich


    10-10-20 wrote:
    My take on this would be that if the wall is thick and you use the multiple hole method, you aren't going to be able to keep the drill bit level for all of the holes, meaning a very messy job.

    As it's a cement render he could make multiple holes with a hilti drill and chisel ot the hole. He makes the hole slightly ocersize, inserts a 5" plastic pipe cut to size and cements it in. The he finishes off the outside to match the render.


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    #8
    JohnBoy
    Registered Users Posts: 2,343 ✭✭✭JohnBoy


    its a 4 inch pipe, i'm already allowing for the bit of innacuracy. its a dose to get a 4 inch pipe into a 4 inch hole done with a core in concrete so i cant imagine its any easier in stone.

    walls not too thick, about a foot or so.


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    #9
    GreeBo
    Registered Users Posts: 27,164 ✭✭✭✭GreeBo


    Heinrich wrote:
    As it's a cement render he could make multiple holes with a hilti drill and chisel ot the hole. He makes the hole slightly ocersize, inserts a 5" plastic pipe cut to size and cements it in. The he finishes off the outside to match the render.

    Thats what I did for my extractor fan.

    Even if you have a diamond core bit you will need to make the hole larger than required in case you are not level.
    If you are going to make the hole larger you will need to fill it anyway so I would save the expense /hassle of renting a fancy hole bit and do as suggested above.


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