Hi all,
I was hoping if anyone could help me or have done a shower niche, in a single brick internal wall?
Plan is to have 600mm width x 395mm height as shower is to be 900x900.
I know that I need to put in a lintel (still need to know minimum requirement)
Picture below shows where I was planning of putting it.

Plan is to only make a crevice according to the brick, i.e. not put a hole in it through the wall.



The brick itself will have a backing of at least 20mm, based on measurement. With the facia cement render included, there should be at least 75mm depth of the niche.
Will this work?