Works have completed on the extension to the Old Mill Cottage, Quennington, Cirencester. The contemporary design adds an open plan living space to a historic Cotswold stone cottage. Ultra thin framed sliding glazed doors open the living space to the picturesque garden and the River Coln. A lightweight green sedum roof floats over the glazed doors supported on two elegant steel posts. The high performance sliding doors retain heat and help to reduce running costs, while the roof overhang provides a canopy to shield the doors from solar gain during warmer weather.