Is the pic your bathroom ? I am sorry to say but IMO this is a bad idea , looks great in a picture but in real life no end of hassle. Not to mention having to wipe down the tub, walls and floor after every shower. As for the stones and mat why not just do a pebble type tile and lay the bamboo mat on top

Are you in a dry climate? Just wondering if the rocks would get mossy.

The first one is mine the second picture is where the idea come from. I'am not live at a dry climate some time it's wet ( Hungary ).

How would you clean those stones? it looks like a cleaning nightmare to me!

I would do a custom bamboo or teak mat. If you can find teak slats, then a frame can be built and each slat can be cut to the exact length of the space between the shower curb and the tub. You simply have to pick up the mat to clean underneath and get the tile clean.

They do not plan on tile but stones that is wahy I suggested tile .

Szabolcs Illes, what will be beneath the mat and loose stones? Is there tile over a waterproofed bed, or just the waterproofed bed? Usually, teak or bamboo mats go on top of a finished shower floor. Will your bathtub be piped to a drain, or will it simply drain onto the shower floor, then find its way to the shower drain? I saw a tub set on top of a teak mat that was not hooked up to its own drain in this way here on Houzz when looking for examples of teak mats for you. I could not find the way to directly put the pictures into my post, so I gave up. One of the pictures I found gave a name of a custom teak or bamboo shower mat company. I will go search again and put links below for you to follow to see the pictures.

Hello Illes!

Your bathroom looks lovely!

From your photograph, it looks like you have tile in your shower area now.

You certainly can use teak floor mats outside the bathtub, and another one outside the ledge of the shower area.

I don't understand why you want to stand on a wooden mat while you are showering, that doesn't seem necessary to me. Are you afraid of slipping?

You should have chosen tile for the floor in your shower and bath areas that is resistant to slipping. Did you?

As for wooden floor mats, and wooden seats, teak is far superior to bamboo.

Some of these bamboo floor mats are constructed with battens on the bottom running perpendicular to the planks on the top so they don't sit flat on the floor in the water, and they often have thicker edges so after you are done in the bath or shower you can stand them on edge if you like to enable them to drain although that shouldn't be necessary.

As in any bathroom, it is advised to run the fan for at least 20 minutes to get rid of humidity.

Thanks for your notes loobab too !

I would use wood or any other material or texture which has similar look like wood because of the warmer color in a kind of cold grayish bathroom. There will be a holed area in the wall which is covered by wood surface too with the use of a shelf area. I heard sh about the teak's high price. Do you know sh about it ? Could bamboo be bought in separated rods which could be assembled and cut to a certain length ( i'd ask similar question to teak too ) ? You have any contact ? ;) Could any other wood be used not teak or bamboo ? I know it's too much of questions .. sry ! ;)

Szabolcs