Copper for Roofing and Cladding
Phosphorus deoxidised non-arsenical copper is used with the designation CW024A (formerly 'C106'). The copper is rolled to thicknesses ranging between 0.5 and 1.0mm (1.5 - 3.0mm for curtain walling) but a 0.6 - 0.7mm thickness is usually used for roofing. Allowing for seaming, 1m² of copper roof weighs approximately 6.5kg.
Copper can be worked at any temperature and does not become brittle in cold weather. It is available in sheets or strips and is generally regarded as a lightweight covering requiring a supporting substrate (such as 25mm boarding), although thicker, self-supporting copper panels are used for cladding. Copper is also available in prefabricated rolled profiles, flashings, shingles, gutters and down pipes.
Suitable pitches range from 1° to 90° and even negative pitches (such as bell section soffits) are easily handled. 'Temper', or the malleability of copper sheet, ranges from 'soft' to 'half hard' depending upon application.
Copper is biostatic and bacteria will not grow on its surface. It is used in gardening sprays and powders to get rid of destructive mildew. |
