starfish Group and Helena Homes The refurbishment 280 and installation of external wall insulation to hard to treat cavity homes in Wargrave. Client Starfish Group and Helena Homes Location Wargrave Start Date September 2014 Value £1,160,000 Length 6 Months Work Type External Wall Insulation Number of Properties 280 Type of Properties Hard to Treat Cavities Insulation Type 90mm Swiss Lab/Swiss Therm U Value Finish Applied Acrylic Render, Brick Slips