Colour, sleek aesthetics and environmental performance were the deciding factors that led to Andersen windows and doors from Black Millwork being specified for a sustainable construction project in Guildford, Surrey.<br> <br> Converting a stable block into an eco-friendly family home, the developer was looking for high specification windows that would complement the other sustainable features of the property.<br> <br> Another key consideration was visual appeal. With a complex architectural design, including roller shutters on all the windows to ensure maximum thermal efficiency and cladding on all the external walls of the building, the windows and doors needed to reflect the property's modern aesthetic. The external cladding and zinc roof were specified in a dark grey shade, so the windows and patio doors were installed in dove grey frames from the Andersen A-Series, to complement the building's existing tones.<br> <br> The extensive specification included five sets of fourpanel patio doors, two awning windows and a large screen of glazed wall and gable.<br> <br> From energy efficiency and ease of maintenance to long-term durability, Andersen A-Series windows and doors are the highest-performing products Andersen makes, Black Millwork claims. The Low-E4 glass used as standard in the range is self-cleaning and highly energy …