straight lines with angle grinder

[Robbox]

Have to cut some drip grooves in a concrete lintel. Any thoughts on making a nice straight edge?
I was thinking maybe screw a strip of wood and use that as the guide.

 

[Nige F]

Wood screwed to the wall and run the back of the grinder against it. Or wood under the lintel and the disk guard run along it

 

[big-all]

you need to work out any angle and the depth you want
you not only want a strait edge but something to run against to limit the depth

 

[SammyInnit]

Practice and experience.

 

[Doggit]

I was thinking maybe screw a strip of wood and use that as the guide.

Not the best way; think about clamping the piece of wood on. But is the lintel in place already; you haven't mentioned that. If it is, you won't get the grinder to the end of the lintel, so you might be better gluing a thin strip of say uPvc on to the edge.

 

[Robbox]

~you might be better gluing a thin strip of sya uPvc on to the edge~
That's what I was thinking too. Unfortunately, the lintel is in place. No idea why they weren't made with a drip channel.

 

[Doggit]

As most lintels are covered over afterwards, it's not often much of an issue. I assume that the rain is running backwards under the lintel. If you've got a steady hand, you could try a bead of silicone to for a drip edge

 

[Robbox]

Yes the rain is running backwards. I looked online for a suitable uPVC moulding but nothing that small came up, saw some quadrants but minimum seemed to be 12.5mm. I may just try a line of grey silicone.

 

[foxhole]

Bit of pvc bead easy enough to trim .
http://www.diy.com/departments/upvc...src=aw.ds.ds&dclid=CMzJmbSLr9UCFYenUQodgHUGog

 

[Robbox]

Bit of pvc bead easy enough to trim .
http://www.diy.com/departments/upvc...src=aw.ds.ds&dclid=CMzJmbSLr9UCFYenUQodgHUGog

OK, I see what you mean, that's neat. Cut off the large side and stick it with no-nails. Can't see rainwater getting past that.