Drilling 15mm hole through catnic / lintel

Mike1983

Mike1983

Mike1983

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Joined
16 Nov 2007
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811
Hi

As per title I need to drill an approx 15mm hole through a catnic / lintel above a double width garage door. The hole is to take a cable from inside to outside the garage.

The lintel is perforated (lots of holes) on the inner side, followed by a cavity, followed by the other side of the lintel, followed by single width brick, then outside.

Would good quality HSS drill bits on a domestic drill eat their way through the lintel or would it not be worth even trying? Also, any other recommendations other than relocating the hole?

Thank you
 
Obviously not an expert but my approach would likely be a two drill bit approach, one for the metal and one for the brick because you could damage the drill bit by using it on the wrong material.

As to the drill... depends on the drill, a good quality one (ideally with hammer function for brick bit) shouldn't cause any issues imo, bear in mind if it isn't you could end up burning out the drill if you try it anyway.
 
Drill from the brick side first otherwise you'll blow the brick if you drill inside out as a trained sky installer would :D

Drill that with a standard hammer then a long hss drill bit
 
Thanks for the replies.

I'm pretty good at general DIY etc and no worries with the brickwork. Never had to drill into metal lintels though other than a pilot hole for a self tapper (blinds) which was a pain. I assumed drilling a larger hole would be a no-go but from the replies I'll go and invest in a decent set of (long) HSS bits, starting small then working up.

Thank you.
 
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