How deep should lead flashing go?

[datarebal]

removed by me

 

[ladylola]

A post or the flashing?

 

[Nige F]

I always put mine in 2".

WHY?

A brick is 4" thick.

Removing 50% of the mortar depth is never healthy.

The flashing is unlikely to perform any better whether it is set in 10mm or 100mm.

Setting it in 25mm is a fail safe method, any more is a waste of effort.

Setting it in as deep as 50mm is pointless.

specially where the brickies have laid flettons frog down not that they do that much