You don t have to scribe and you could just caulk the uneven gap but it looks a little uglier.
How to install pebble stone flooring.
In most cases the stones come on sheets and the pattern is such that they interlock to create a random look.
Set tile using a trowel evenly apply thinset no thicker than 1 8 image 1.
Line up the edges of the natural stone pebble tile sheet with your guide lines.
Drag a one quarter inch v notched trowel through the thinset at a 45 degree angle.
Spread the mortar with the notched end of a trowel creating wavy lines in the adhesive.
Apply a high quality thin set mortar or tile adhesive appropriate for indoor use on a 1 foot section of the floor you wish to tile.
Pour the grout over a small section of your pebble floor.
Press the sheet firmly into the.
The cement mud is a mixture of coarse and medium sand and portland cement.
Repeat until you have grouted the entire floor.
The pebble stone floors are not too hard to install.
Cutting the pebbles is done with.
For this reason i prefer to install the pebbles on a concrete mud base just as the master tile setters of old did it.
Full instructions and tool list needed is here.
Force the grout into the spaces between the pebbles using a grout float.
So one way to do it is to install the floor first then install the walls and scribe the bottom row around the pebbles a little bit.