Most of the gypsum had been removed from the walls. A 2.5 thick coarse Ty-Mawr hemp fat lime plaster was used. Mixed up with pozollan added to speed the set time because time was precious to lay the floor. A fine and super fine mix was put on top 5-6 days later. Two coats and only 4 days work. – Plaster boarding and gypsum probably would have taken longer! Phone was down and finishing pics to come soon.