Looking for any surveyors or people who know their property types. I have a property where the valuers comments are: "The walls appear to be of non-traditional pre-cast concrete frame construction with pointed brickwork and synthetic stone infill, with some areas of concrete panelling." 1960's built, 9 flats in block. Anyone know if this is seen as PRC which likely comes under the defective issue and need a repair certificate, or another type of non-standard?