Jamie requested 2 quotes from Stone Masons in Croydon Hills
Pool is rectangle 3.5m x 7m and has a C200 galvanised steel purlin around the edge. I intend to screw down some 6mm marine ply to the galvanised purlin - so the sandstone would need a grout that can bond to wood.
The other difficulty is that it is a wooden pool and may encounter some small amount of flexing. This would mean that the grout needs to be semi-flexible.