petercharlesfagg wrote:
Friends, two years ago I had a woodburning stove fitted into the
cavity left by the removal of an open fire.

The sides and back of the cavity were professionally rendered and
plastered and then I applied White emulsion to the surface.

The heat generated by what is essentially only a small burner is
making crazy cracking of the plaster especially behind the burner. It
is NOT loose only unsightly.

Any suggestions as to either filling or painting over or perhaps some
form of heat shield/reflector?

Regards, Peter.
Sheet of masterboard or multiboard and heat resistant paint.

Or render and paint.