Raising my bath 5-10mm

[Keithmac]

I bought one of these kits, it's expensive but did the job (walls weren't straight on one end of bath).

I prefilled the big gap with silicone, let that set a couple of days then used the Bath Seal kit to trim it up.

Been on a few years now, easy to clean as well.

 

[MattB83]

Yes.It was.Otherwise you would not be in this situation.Maybe it is a flexi cheap and nasty bath too...Sort it properly or it will rot your floor and ceiling.

Thank you. The bath is a reasonably nice one. Just had a plumber round for another job who suggested it needs to be lowered, layer of silicon, raised up to stick it on the base of the tiles then raised up. Then a strip to seal the gap, similar to what others here have suggested. She said she'd sort it for me but then the 1hr shower installation took 5 hrs so I'm back to doing it myself

 

[JimCrow]

Those baths were supplied with angle brackets to fix it to the wall, if they have been fitted you will struggle to move it up or down.

 

[MattB83]

Mystery solved...

So I don't fully understand what's going on but the 5 legs (1 central) aren't all touching the floor so when someone gets in it moves/flexes until it does. A few turns of the bolts and it's solid. I raised it about 5mm all around which will make sealing a lot easier. Unfortunate noticed a slight leak in the drainage pipe so that's the next job...

Thanks everyone for the advice!