Well, related!

The corridor to our garden storage (brick garage cut off by extension)
includes an inspection manhole.

I have replaced the cast iron circular unsealed cover with a sealed
version topped with a square lift off cover having raised sides. This is
intended to be tiled to match the floor covering.

The lift off bit is strong galvanised steel with reinforcing
indentations which reduce the depth in places from 45mm to around 35mm.

The original plan was to continue the floor screed leaving around 12mm
for ceramic tiles. However, sand/cement screed 33mm thick or less on a
removable cover struck me as being a bit delicate.

I can probably find some reinforcing mesh to stiffen it up but has
anyone tried this sort of job?

I have some plastic *isolating* mesh unused from the wet room job but at
6mm or so thick worry that this will further reduce rigidity. Googling
found lots of tile cements which are OK up to 25mm thickness. Is that
the way to go?

Any thoughts?
--
Tim Lamb