i've never been happy with the shower cubicle in my van, i had planned to get one of those complete plastic shower enclosures, it's sort of a square tray with a corner missing (deliberately and moulded in)... so has 5 walls, on the narrow angled wall goes the shower and controll bits and bobs. i'd found one, arranged with my motorhome body builder to have it put in the van as they built the new body... as it's much wider than the entry door, so would have to be places in before the sheeting went on. Went to pick it up, and it had been dammaged, last one and no more available, i managed to buy just the tray of the enclosure, and made my own walls out of shower board, (a 3mm ply with waterproof covering on it) of course this ment i had 7 vertical seams, plus 5 at the botton and 5 at the top, i started out with silicone seams, but they'd split open after a while, so i used some of that bath sealing strip.. the rigid stuff, that came unstuck after a while, so i used the bath and shower seal strip on a roll. but they are all designed for use in a house where any movement is very very tiny, not the vast temp swings in a van, not to mentione the vibrations and all that as we drive down the lovely smooth roads in england (not) i'm getting fed up of it, every year i have to re-seal, and just went to have a shower in the van (boiler in the house broke down on the 22nd of fed this year, managment company are trying to get out of fittin a new un) opened the door... and the darn front seal had come unstuck and curled up, my fault partly for parking the van in front of the house which is south facing, and not opening any vents, was 35 degrees in there. I've often thought of fibeglassing the cubicle, but have never done any fiberglassing other than a little blob to fix the motor mount in on a model boat i built once. What i'd really like is somewhere that does that industrial glass spraying, where they have the chopper guns and all that, and spray in the rough glass, then lay on the tissue and spray on the top coat and roll it smooth. anyone do this as a job?? would my shower cubicle be suitable? i imagine i'd have to remove all traces of silicone sealant? i'd also thought about that spray on pick up truck bed liner stuff, but never got any replies when asking the makers of it if i could use it to make a waterproof one piece shower cubicle.