Tiling over glass mosaics

[Jeff the tiler]

Hay all, Just a quick one. I have to tile over some glass mosaics with some porcelain tiles No option unfortunately. I was planning on using cement based rapid set to but wanted to see if any of you have any other thoughts as need it to set up as quick as possible.

 

[Jeff the tiler]

Sorry should have added, substructure is all fine etc with regards to taking the additional weight so it is purely the adhesive side it would be great to hear your views on.

 

[Rookery]

Out of interest, what is the substrate?

 

[Jeff the tiler]

mosaics bedded into rendered walls over brickwork