If they used a linear drain, the larger tiles will drain properly. If there is a center drain, the largest you can use is a 4x4 tile and sometimes then you get bad lippage. What is the COF of these tiles ? The co-efficient of friction should be printed on every box of tiles.

I'll have to look tomorrow. What should the COF be?

It is a center drain.

I would be concerned then of the competency of the installers or at the very least the lack of supervision. Sounds like a redo to me. Hopefully the tile setters was not the one who installed the waterproofing system for the shower.

Orit - look close at my overlay detail (above). See how I started the layout from the center of the drain? See how the tile corners are clipped. And that the drain is square. These are also key steps. Hope that helps.

You of course can always take the harder route and do diagonal cuts in your design. Like this shower.

"...If there is a center drain, the largest you can use is a 4x4 tile and sometimes then you get bad lippage...." - Cabot & Rowe

Sometimes when something is new to a setter it appears like it can not be done. Clearly you can see that a shower can be set with large format tile and no linear drain.

More info on this concept at this HOUZZ Discussion Page: [USING DIAGONAL CUTS TO SLOPE YOUR SHOWER FLOOR[(https://www.houzz.com/discussions/using-diagonal-cuts-to-slope-your-shower-floor-planning-guide-dsvw-vd~635709)

url: [https://www.houzz.com/discussions/using-diagonal-cuts-to-slope-your-shower-floor-planning-guide-dsvw-vd~635709[(https://www.houzz.com/discussions/using-diagonal-cuts-to-slope-your-shower-floor-planning-guide-dsvw-vd~635709)

Thanks John! I am heading there now so will take a look.

Good Luck.

Thanks! Apparently we need it! LOL

"....If they used a linear drain, the larger tiles will drain properly....." - Cabot & Rowe

I would debate this point as well. If they set large tile properly it will drain properly. Just having a linear drain does not make a shower work better. Slope to drain needs to be a good 2% and the tile should be a hair higher than the drain grate.

This Kerdi Line shower drain is linear. The tile is large format. Yet the shower does not drain properly.

If it did the grout would not always look wet at the drain side of the shower.....

"When we spoke to the tile subcontractor, he said he would cut the tiles down to 4 x 4 for the shower floor."

That pretty much sums it up! Yes any size can be cut to drain but you had an expectation that was not met. The size of the shower floor tile would always be discussed with the client prior to sale/install.

We could these tiles to the exact dimensions of the drain so it would be full tile around the drain and against the walls.