Stud wall recess's - Tile Advice

[samnjarv]

Hi everybody I was wondering if some can inform me if it's ok to pre make some recess boxs out of say 10mm ply, glued and screwed, sealed on back and tanked inside even though the recess's will be on the opersite side of the shower. Just seems easier to do it this way and then centre the box in the stud wall being made. Any thoughts and ideas would be very appreciated

 

[Time's Ran Out]

Seems a bit of a faff to me!
Set the wall out for the tiles and put the recess in to fit full tiles.
Nowt worse than cuts around boxed shelves!

 

[samnjarv]

looking at some of the recess on this forum they are a few that have cut in.. ive took the tile measurements and made a plan of the box size i'd need to incorperate tile and adh thinkness and also grout space. its only 600w x 300h x 200d going to have two of these spaced so they run in line with the wall run and include a few decking led's inside should look nice hopefully.. I just thought while i'd got a few days spare i'd make the boxs rather than mess about with bits of 2x2 and plasterboard nearer the time. the only cuts to the tile will be the top and bottom one, other half doesn't want a 300d recess instead hence 200