"Frank Z" wrote in message
...

Hi folks,
I need to plaster over a steel lintel over an open fore recess. Its
visible surface is 6" x 31" . It is 1/4" thick steel. The steel will
get fairly hot (I guess about the pemperature of boiling water but not
much more) because it is in close proximity to a fire. That means the
steel may expand and contract somewhat. I'll be using one-coat plaster
from B&Q, and the plaster will be about 6mm thick over the steel. What
is the best way to ensure the plaster stays stuck to the steel? One
idea I had is to rivet a piece of perforated sheet-metal to the steel
before applying the plaster. Any other suggestions would be
appreciated.

Thanks

Frank Z

galvanised steel mesh using a 2 part construction adhesive (Epoxy, PU or
Acrylic) to adhere it to the lintel....... and for extra heat security ...
use a fibre reinforced heatproof screed (available online from BES) with a
plasticiser, and Don't use plaster ......