Is there any substitute for rough fresco coat except use of aged lime putty. Somebody mention hydrated dry lime type N mixing with lime and cement ? How is working slaked lime old just 2-3 mounts ,used just for first coat? Is there any chance to save a many because aged one in this country is very expensive, and for larger project it going to take a lot of material (3-4coats).
Ilia thanks for your answer I think in same way “gypsum” is very dangerous for fresco .In the book I find that gypsum is calcium sulphate and it is same calcium as a lime(when you mentioned me that it may fall down when it got dry did you mean month ,less or more. And what are you thing if the wall has no moisture(as furring walls) is efflorescence shows on surface. If I gave up with that already set gypsum plaster how furring strips (with metal lath)going over same type of furring wall.(is that going to by permanent)
Thanks a lot
Filip