Arthur 51 wrote:

Hi all.
I fancy using slate tiles for a hearth and back.
So it would be 4 x 30cm square tiles for a 1.2m length hearth
but how should I build up the height to the usual hearth depth?

One of ours is a hearth constructed with a brick core and then tiled -
in our case with heavy terracotta "pammets". No idea what's under the
others.