Warwick Dumas wrote:

I decided now it sounds like hypertufa is quite a cost-effective option but
I wondered if a peat-alternative would work. Does anyone know what the point
is of including the peat? Obviously it's very acid whereas you don't think
of mortar as being acid - does it create some kind of little bubbles?


The reduced usage of peat was only just properly beginning when Geoff
started experimenting with these recipes. By all means try some of the
alternatives. I think the man'd be proud-)
//
Jim