Shower cubicle install

[denso13]

You'll never cover the whole area properly with silicone, use powdered floor tile adhesive applied with a notched trowel.

 

[Rudie]

Agreed. So to fill the void shall I do the 5:1 sharp sand to cement semi dry mix and then once set use flexible powdered tile adhesive with a thick bed, notch trowel so the adhesive fills all the voids in the shower tray underside?

 

[denso13]

Yes, sounds like a plan.

 

[endecotp]

The instructions work on basis that the floor is already solid and flat.

OK

So to fill the void shall I do the 5:1 sharp sand to cement semi dry mix

I’m not sure dry / “semi-dry” sand-cement is appropriate, shouldn’t it just use the “normal” amount of water?

Not that I know - not my area of expertise by a long way.