Grrr,
we have just had an extension. The down light below the new bathroom was dripping water today.
The shower cubicle consists of Stud walls, plasterboard and a coram waterguard shower tray
I'm tempted to re-mastic then (and only ) if necessary remove the bottom couple of rows of tiles, remove the plasterboard and fit some pieces of aquapanel, join with mastic to the existing plasterboard and tray and re-tile then re-seal with mastic. I think the leakage at the sides is due to the gap at the bottom and the high flow of the water swamping over the lip into the space below the tray between the new gaps in the mastic.
Any comments or suggestions gratefully received.
A