Hi there, yes you’re right to resist the urge to use CT1 as you need to bed the tray in, the ply may be level but sometimes trays can be slightly warped and need levelling with the mortar. How we deal with the bed gap is that it all depends on the finish floor. We always put the tray in before the main floor substrate and or tile/karndean so that makes up the height. If we’re using something thin like karndean I would either sit the tray straight onto the floor, if floorboards or chipboard we replace this with 18mm ply. Sometimes we over board with a 6mm hardibacker board depending on the floor. By the time we overboard the main floor in either 6/12mm hardibacker board and tile or latex and lay Karndean that does the job. Then finished with a sealant joint. Hope this helps?

Lester Bathrooms Thanks. I’ve replaced the whole floor with 18mm ply so tray is going directly onto that. Thin Karndean is going down everywhere around it- I guess finished level of that is around 4mm so maybe I don’t need to worry about the bed gap . How much flexi tile adhesive do you put in the mortar ?

@@dw8750 if I’m using a standard empty tile adhesive bucket (the 14kg ones) I tend to use about 1/4 of flexible adhesive like setaflex standard. I would see what the bed gap is like, you’ve always got the option of latexing the floor to make up some height before the Karndean installation. Hope it goes well! Merry Christmas.

Lester Bathrooms all done (unless I need to redo tomorrow!), think I got away with it . Not my kind of job that one, you make it look easy. Thanks for doing the video and the replies, there are not many videos covering this . One British plumber I found did it but seemed more interested in tacky catchphrases than a proper job ...and he used silicone. Keep it up. Have a good xmas.

Yeah, cos I was just about to start then, " where do i start!?"... . But then I read this. Hope to see you do a few things differently in the update. This was the way of old, and still is for some clients , but I'm expecting you have moved with the times. So look forward to watching the next one.

Hi Alex, I would check the instructions for the tray, they sometimes give the ratio in there. For this particular tray it was 5:1 sand and cement. I would seal your ply with sbr sealer or even better install some 6mm cement board to your ply and bed the tray onto that. All the best with your renovations 🙏🏻.

Absolutely. Always seal the tray before and after you tile. Thanks

Hi Michael, I would say that a big tray like that is a two person lift. Try and lift it to the back as much as possible before placing down onto the mortar. I always put a level onto the floor before putting down the mortar to see where the highest point is and use that as a rough guide, then I’m very over generous with the mortar so I can bed (push) the tray down into it so I know it squashes down when I’m getting it level. All the best with your installation Michael. 👍🏻