Siliconing Advice

[WhoMe?]

Hi

Does anyone have any advice on what I should do. Had my bathroom refurbished about 2 years ago and the silicone in the shower cubicle does not want to stay sealed. The fitters attempt looked neat but did not stay long, I've done it 2 and 3 times, the last time being a generous and neat job, but has still come unstuck in places. At the widest the gap is probably around 8mm. I think it's due to being a old house and there is a little movement in the floor. I use clear silicone as it matches the grout and it's easy to see the water behind.

I was thinking perhaps a plastic angle or similar pushed into the corner so the joins are a lot narrower, albeit they'll then be two.

 

[oldbutnotdead]

A pic or 2 would help. A little movement (like a millimetre or so) should be fine, more than that (especially combined with a lightweight shower tray or any tray on one of those plinth kits) and you really need to look at sorting the floor (which the original fitter should have advised)

EDIT Yes you can try PVC angle but it'll look horrid. Can't imagine what colour grout matches clear silicon

 

[WhoMe?]

The previous owner of the house or their builder thought they'd separate the bathroom and bedroom with 140mm block, in the extension. Theres nothing supporting in the room below. When we replaced with stud the floor shifted upwards a noticeable amount but not 100% The back of the shower tray is fine as this is the original outside wall and the newish joists start there.

Grey is the answer to what colour matches silicone. The dark grey in the photos is due to water behind. At this point I'm passed caring how it'll look, I really hate this task and just want it to stop