Herefordshire Housing Association The refurbishment of 16 failed cavity houses which were extracted and had external wall insulation installed. Client Herefordshire Housing Association Location Hereford Start Date May 2016 Value £500,000 Length 9 Months Work Type Cavity Extraction, External Wall Insulation, Roofing, Associated Works Number of Properties 16 Type of Properties Insulation Type 110mm Mineral Wool U Value Finish Applied Silicone Render