Fitting a shower tray

[sigma]

If you don't user the "feet" that tray must be fitted using builders sand and cement mix otherwise it will crack further down the line. When I rebuilt my bathroom last year I used a shower tray similar to that and ordered a easi-plumb kit for it as there was no way I could get the waste through the floor to the stack. However, after seeing the easi-plumb kit I decided against using it and built a plinth to sit the tray on instead, that way I keep access to the plumbing. After watching a load of Youtube guides I fitted it with the sand/cement mix, levelled it and let it set and it's been perfect so far. I didn't use tiles though, I used Aquaboard around the shower instead. The rest of the bathroom has PVC bathroom cladding.

Sand cement does seem like a safer bet, as long as it's mixed correctly

 

[b0rn2sk8]

If you require a shower on a riser, use the legs designed for the job would be my view. They will also save a hell of a lot of time and brain power.

it’s not like building the base will be free either, the cost difference is not significant enough to worry about DIYing a base.

To add some context, my plastic (or whatever the make modern baths out of) claw footed bath is held in the air with 4 tiny feet which just bolt onto the bottom. It’s huge compared to this and doesn’t flex in the middle.

 

[200sols]

Could you explain how you made that please? Thin bit of board with clips on? Backer board + tile on top?

Bit of timber, tile board screwed to that. The trays ive used didnt have that lip though.

My concern is that they don't seem to be able to be screwed into the ground, so I'm going to give them a call to see what they advise. Surely it will move? Or at the very least flex?

No. Once you have the heft of a glass enclosure on top its not going anywhere. You should batten out the wall for the tray to sit on as well.