hi folks, replacing an old window with upvc one, the lintel above it is reinforced concrete, I will try to drill fixings that miss the rebar, but in case that's where the fixings need to be what drill bits are good for going though rebar ? Heller trijet are a bit pricey for a one off job Makita Nemesis ? do screwfix or toolstation do any good ones ? just like to be perpared before i start the job, don't want to have to stop half way though and wait for new drill bits
Rebar is just steel, so any metal drilling bit should be fine. You'll most likely be chucking it away after use as it'll be too blunt to be of much use (unless of course you're equipped and skilled to sharpen it). Buy a few and return them if it turns out that they weren't needed.
Indeed ... in fact the chances of hitting a rebar are pretty low. I've drilled many many lintels to mount curtain rods and pelmets and have yet to hit a rebar. If I ever did, I'd just angle to hole to avoid it.