Installing Mosaic On a Wet Room Floor

[MB2603]

Hi All,

First time poster and tiler here. Hoping to get a bit of advice on tiling a wet room shower tray using hexagonal mosaic (30cm x 30cm sheets - individual tiles are probably 2.5cm x 2.5cm or so). The shower tray is level to the floor, I've used cement board on the walls and floor and tanked and taped the whole place. I've dry-layed and cut all the mosaic that I need and ready to go. The issue I am having is that I am using a nassboard tray (Wetroom Shower Tray Kit Aqua Tanking Kit - Nassboards - https://nassboards.co.uk/product/wetroom-shower-tray-kit-aqua-tanking-kit/) and it has a 15mm upstand around the drain and the mosaic tiles themselves are only 4mm high. Based on my significant levels of google research, I should only be using the V-notch trowel for mosaic so it doesn't leave me with much height on the adhesive. Net result is, the tiles are sitting below the top of the drain which is bad news.

Any advice on how I could counteract this with adhesive? I have seen some examples of using a 10mm or 12mm notch trowel and slightly flattening out the top of the adhesive and laying the tile on that. Would that work or be something that would be recommended? Any other suggestions (outside of call a professional!) would be much appreciated.

Thanks very much!

 

[Gazzawade]

As you are attempting a difficult job in itself ... put a layer of rapid set (flat) to make up the discrepancy following the falls ... and let it go off.

 

[bsc ceramics]

Iv never seen one like that and iv see a few in my time
does it have a fall on it to the drain?

 

[Joe8189]

I would also reccommend self leveling to bring the level up slightly. If you use Ardex WA adhesive/grout, you can put a deeper bed of adhesive 6-8mm and press the tiles down to force the adhesive through the gaps and grout as you go. I've recently used it on a swimming pool and it works well with mosaics. It's a two part mix and a bit sticky but its waterproof.