The Natural Philosopher wrote in message ...
sw wrote:

Do you reckon 4:1 sand:cement mix is ok for the brickwork at
the back of a wood-burning fireplace?





Nothing works here execpt an iron fireback. Even bricks erode quite fast.

Wood doesn't burn very hot. You have to wait for the cement to cure
over a few day and I believe you start with a very small fire at first
to temper it. Not sure though.