How does leadseal do the job of mortar?

[Safety First]

Putting an apron flashing into a roughcast rendered brick wall.

Cutting blind into the render. So the chase 15mm wide 25mm deep, may be mid brick or hit the mortar bed, or a bit of both

Whichever I finish with I will use hall clips to hold the lead in place.

If I use Leadseal and the chase 'lands' into the mortar bed as opposed to into the face of the brick,
is there not a chance the bricks will move without mortar?

In a plain (unrendered) brick wall, is really ok to rake out an inch (or more?) and finish with leadseal? Doesn't the wall need that mortar to remain stable?

 

[Alastairreid]

25mm makes no difference.

 

[Safety First]

25mm makes no difference.

..... whatever you fill it with....?

I wasn't a brickie when 'the new way' - mastic filler- came into play.... I bet someone would have asked how mastic gets by doing job of mortar....

is it really immaterial?

Thanks for the input.

 

[Alastairreid]

A 25mm groove will not compromise the integrity of the brickwork whether filled or not.