Alderley Cold FrameHardwood timber construction Pre painted in a contemporary grey wash Durable lacquer finish Two independently opening lids with lid stays and adjustable height settings Twin wall polycarbonate glazing Assembly instructions here. The Rowlinson Alderley Coldframe provides a perfect growing environment for young plants before onward planting. The Coldframe features polycarbonate glazing on its opening lid that provides ventilation, light and easy access