4" hole in external brick wall

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25 Jul 2022
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Good afternoon all,

I have a quick question for you. I aim to make a hole in my bathroom wall to fit an extract fan. The distance from the wall and the window is about 60cm (see attached picture). From the outside it seems that there is a hole already but I think it is either covered by the wall or very close to it so I don't think I can reuse it.

I am therefore wondering where the new hole can be drilled considering that there is already a 100mm hole in the external wall. Would you mind to answer the following questions so that I can be sure the builder does not make a mistake:
  • Do we need to keep a minimum distance between the two holes?
  • Do we need to keep a minimum distance between the window and new hole?
  • Do we need to keep minimum distance between wall and new hole?
  • I am unsure how wide the lintel is. Can we drill below it?


The plumber will come to do some work in the bathroom and I asked him if he could do it. He told me he could... Are plumbers normally competent to do such things? I'd like to question him before he starts the work but by knowing the answers hence my above questions ...
:)


Thank you in advance
 

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Have you considered an in-line fan that can extract to a tile vent or soffit?
They are quite a bit more effective than wall mounted fans, it looks like you have a hole in the ceiling ready for one and it avoids the hassle of core drilling! :)
 

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