Liquid membrane over formed tray

[Qwerty]

Most Wetroom/shower tray failures happen where the grout cracks, usually corners, so I always make sure that tanking covers the complete shower area including up the walls.

But corners and perimeter joints should be siliconed, not grouted

 

[cuemanlew]

the tanking kit comes with a semi curing Silicon which I apply to all the joins before any tiling is done, horrible stuff. I do grout my corners, then clear Silicon over once dry

 

[Dumbo]

the tanking kit comes with a semi curing Silicon which I apply to all the joins before any tiling is done, horrible stuff. I do grout my corners, then clear Silicon over once dry

That's still not right your corner joint should be clear of grout and adhesive then it should be siliconed to allow for movement

 

[Qwerty]

Agreed ^^

What tanking are you using?

 

[One Day]

Most failures I see are due to water sitting beneath the tiles and degrading the (usually spot-fixed) adhesive. That, and Silicon around the drain which prevents sub-surface drainage.
Not a problem which is even possible with Schluter drains.

 

[cuemanlew]

I assume you suggesting colour matching the silicon with the grout, I can see the logic in this.

 

[One Day]

I assume you suggesting colour matching the silicon with the grout, I can see the logic in this.

No. Don't put grout in internal corners!

 

[cuemanlew]

No. Don't put grout in internal corners!

I meant using colour matched Silicon instead of grout