Buy unrectified tiles?

Hello everyone,

I am currently having difficulty making a decision. I am renovating a single-family house and am currently occupied with choosing the tiles.

An area of about 125 sqm is being tiled, as well as 2 bathrooms. One bathroom has a walk-in shower. The plan was to tile the entire floor uniformly with 60x60 cm tiles. In the bathroom with the walk-in shower, the shower area will be color-contrasted, also 60x60, and the walls in the bathroom will be 30x60.

At the tile specialist dealer, I was offered very beautiful tiles from a series by grohn, and all the tiles would be from one series.

The offer sent to me was excellent in terms of price. The tiles are r10b and fully colored.

However, as I saw on the grohn site, the tiles are not rectified and calibrated.

I asked the tile dealer about this, and he said it was not a problem, you could simply create 3mm grout joints instead of 2mm for rectified tiles.

I also wanted to cut the baseboards out of the floor tiles, so 2 pieces from the 30x60 ones.

Nevertheless, I am a bit uncertain whether I should buy the non-rectified ones; visually, I like them very much.

What are your opinions on this?

Nowadays, hardly any manufacturer produces tiles that are not rectified.

Does anyone have experience with non-rectified tiles and grouting, perhaps even experience with the manufacturer grohn? The series is called Studio.

The rooms are about 16 sqm, 4x4 m.

However, the living room is 8 meters wide.

If I am unlucky with the tolerance there, I could end up with irregularities of 1,x cm at the end of the room in the worst case. Assuming about 1 mm size difference, for example.

I also have a second question.

The old terrazzo staircase is to be tiled over. There are 2 cm overhangs on the steps. I wanted to level the area under the overhangs to make it easier to tile.

What is best to use for leveling there? I prime everything with dispersion bonding primer and then was thinking of adhesive and reinforcing mortar because it sticks well and I still have some bags left. Does anyone have a better idea? Normal leveling compound is not possible because it is a vertical surface. If it cracks, it's not so dramatic since it will be tiled over anyway.

Many thanks

Rectified and calibrated mean the same thing.

With natural stone, the non-rectified looks better. My opinion. Rectified ones have slightly smaller joints and that simply looks more seamless with large formats. With small tiles, I wouldn’t find that so bad. Smaller joints also mean that the craftsman has to work cleaner, as irregular joints are much more noticeable. So it costs time and this in turn costs money.

Yes, I am aware that modern large-format tiles look best with narrow grout lines. However, the difference between 2 or 3 mm should not be too noticeable. Ideally, it would be people who have perhaps laid 60x60 tiles with a 3 mm grout line. Here is another picture of the tiles

oh yes the tiles are to be laid with a cross joint. So no half bond, random bond or similar