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Drill bit for an awkward lintel

Discussion in 'Windows and Doors' started by phil1664, 7 May 2015.

  1. phil1664

    phil1664

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    I'm trying to put up new blinds for my mother and have now moved on to the upstairs windows but I'm coming up against a very awkward lintel!

    I;m trying to fit the small brackets that an aluminum venetian blind rail will clip onto. the sort with just one screw holding it into the brickwork.

    Downstairs, there seems to be a metal strip across the inside of the window frame behind the plaster. I've manage to get around it by using a HSS drill bit to punch past the metal and use a rawlplug as normal. There's hardly any weight on the blind so it hangs just fine.

    Problem is, upstairs, there seems to be a much tougher metal strip. I can't see it being an RSJ as the window is less than 6ft across but I can't get through it. I've tried HSS drill bits and they just turn red with the heat. I can see the metal in the hols and it's just smiling back at me!

    Any ideas how I can:

    a) drill through, what drill bit/speed will I need. Or;
    b) another way of attaching the blind!!

    many thanks,

    Phil

    Oh, the house is a conventional build, constructed in the mid 1970's.
     
  2. freddiemercurystwin

    freddiemercurystwin

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    Try a new decent HSS bit first.
     
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  4. Cobalt drill, slow speed no hammer action.
     
  5. phil1664

    phil1664

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    EddieM, I'll give that a go, thanks.

    Phil
     
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