Im installing a new wet room at the moment and using the kaskade wet tray, linear model however i have received the trap with a continuous metal strip and wanting to know, how is this installed. Ive installed wet trays before and have installed the kaskade wet trays on numerous occasions but this will be a first for the linear model and scratching my head at this trap. Shouldnt there be holes in the metal strip? How are the tiles butted up to it etc..