Cutting into an Internal Corner in a Peddledashed Wall

Hi

I need to cut a chase / recess into an external pebbledashed wall for a lead flashing.

I plan to use a 4" circular saw with a diamond blade suitable for masonary.

I need to cut into an internal 90 degree corner, running the chases up at 45 degrees for a porch roof.

Can any one advise what to do when it comes to trying to cut right into the corner for the lead flashing ?

Is a hammer and chisel the only way to cut a chase right into the corner ?

Cheers

 

Hi

Can any one help ?

 

Not entirely clear on what you're up to here, nor why you need 45 degs., but a 4" blade is really too small to cut into a corner to any useful depth.. You'd need a 9" blade at least. As ever, photo appreciated...

 

It is possible to stitch drill a series of shallow holes then use a plugging chisel to link them into a chase. A mini angle grinder can get to within an inch or two from an internal corner.

 

Gents

Many thanks for the info.

I have uploaded a picture. I have tried to show the 45 degree cuts required to fit the lead flashing for the porch roof with the red lines.

By the way we have had to remove the roughcast and are about to apply fresh pebbledash.

Should the lead flashing be installed before pebbledashing ? Is this the best way as I am a little concerned about having to cut into the fresh pebbledash.

 

instal the flashing and beads before the new cast.

 

alastairreid

I agree with you. our roughcaster wants to do the same, however the roofer and joiner want to do it after !

should I push to have the joiner and roofer do it now ?

 

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