Cutting a hole in a cavity wall for an extractor fan ?

Discussion in 'Building' started by STEVEROG, 4 Aug 2009.

  1. STEVEROG

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    I need to cut a hole into a cavity wall to fit an extractor fan. I guess the best way to do this would be to use a large core drill but I do not have one of these. So...

    1. Do I need to buy / hire a core drill?
    2. Is there another sensible way I can do this without a core drill

    In addition, do I need to add any support such as a lintel or other reinforcement where I cut the hole?

    The hole will be at the centre (left to right) of a gable end wall of a bungalow. The wall is rendered brick on both sides.

    Thanks
     
  2. IJWS15

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    How big a hole?

    Biggest I have installed was a 12" Expelair - would not want to use a core drill for that.

    Choice is a core drill or stitch drill - a series of holes around the circumference and break out the centre.

    Depends how neat you want the inside & outside to look.
     
  3. STEVEROG

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    It's looks like a 6 inch fan so I assume the hole size is approximately this size. The stitch drill is worth considering but I will see how much it will cost to hire a core drill for a day. This might save me some time and give a better end result.

    Steve
     

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