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In article , "Tim Smith"
says...
Hi

Moved house last year and the new place needed loads of plastering done.
Rather than pay a plasterer to do it all, I went on a course.

On the course we were taught using a sand/cement undercoat onto bricks
followed by a skim coat. Most of the plaster at home had to come off becuase
it was all breaking away anyway, so I redid using sand/cement and then a
skim coat.

I recently had a plasterer in to do some ceilings which didnt want to do and
he suggested that bonding coat would have been an alternative.

Was it wrong to use sand/cement or is this just a different way of doing it
? Im sure the sand/cement would be very difficult to remove from the walls
now !

Normally browning for sound unpainted brick or block, bonding for
everything else. Cement will be more resistant to damp, but probably
not an advantage in most applications.