I have to scratch there! But did anything remain on the clay? The sides have partly already been built up with bricks because the gables must have once collapsed (Inside, a genius had removed some beams he considered unimportant :rolleyes:). On the backside, there is only bare clay without any plaster.
Sounds like a miracle that the house is still standing. Apparently, some experts were at work.
Half-timbered houses are often seen in combination with white plaster. I can think of two half-ruined houses here with blue plaster in the infill panels.
During demolition here, at least three shades of green appeared. Half-timbering with clay plaster, built over, insulated with polystyrene, etc. you could have good chances. Are there perhaps anywhere house ruins that have been empty for so long that the GDR plaster passed them by?
I would first clarify the basics of renovation and then decide at some point how to plaster.