I have had two Coram waterguard shower trays installed as part of an
extension. The showers have leaked two or three times. I have sealed
everything as best I can and identified the main cause to be the grout
above the first row of tiles.
When I bought the trays I phoned coram customer support and was advised
that part of the wall should be chased out to allow the tray to fit in
my alcove. The alcove consisted of a dry lined wall and two stud
partitions with plastered plaster board, the problem seems to be that
the tray flexes and cracks the grout above the first row of 4" by
8" tiles which overlap the tray. The water gets inside this crack
and runs down behind the tray through the floor and through the ceiling
below. I can only reach the front three legs but it would appear that
they might loosen (unscrew) with repeated use of the shower.
The tray fits in the alcove between the wood of the studwork but
doesn't have plasterboard against each side.
What do you suggest?
I am considering using mastic instead of grout above the first row of
tiles, trying to fix the legs so they can't spin with mastic/a screw
(??) or using a row of larger tiles above the tray such as the 12 inch
floor tiles I have in the bathroom.