The mould removal product worked, but the walls were still dark and patchy, so decided to cover the clay with the same lime render that coates the outer walls.
Very interesting process as there are no directions on the bag as to ratios, my neighbours rendered one of their rooms with lime and Mark (who is Swiss) said that in Switzerland they used to lime wash the walls once a year to keep them fresh and I guess free of mould.
So I basically winged it in relation to the water to lime ratio. One of the aspects of this material is that it requires constant stirring as the lime settles very quickly. My Three Musketeers used dish washing liquid to keep the clay/lime suspended, but as they are not here, I am a bit impatient, and I was scared I might use too much liquid so stirring the mix constantly became the order of the day.
For those who tend to be a bit bull at a gate like me, make sure you have plenty of protective gear as the lime can burn, so gloves, goggles, hat (for high drip areas ie my walls go from 2m to 4m))and skin covered is important. I started with a foam sponge, tried also a large brush and a paint roller for the high areas they all worked in their own ways. The only tricky part is the goggles kept fogging up, making it a bit hard to see, but it will require 2-3 coates so hopefully that will solve the missed bits.
It was a bit sad covering the clay render, but one of the other triggers was the mudwasps. They have made a number of nests in the building which is fine except instead of travelling the extra few metres to the clay pile outside, they were helping themselves to the clay wall.
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