No More Mouldy Grout!

I recently installed 3 stone panels over very badly laid tiles in a shower cubicle. The grout had cracked in various places, mould impossible to remove from the cracks, and the wall recess in particular was leaking through the wall into the skirting on the other side in the laundry.

Before:

Before: Badly tiled, with grout now permanently infested with mould
Damage from water seeping through the cracked grout on the other side of the wall
After: Sparkling clean, hygienic and no grout to bother with ever again!
After: Another view