EngGeneral Characteristics
A wide variety of mechanical characteristics, or tempers, are available through various combinations of cold working and heat treatment.
A good resistance to corrosion on surfaces exposed to the atmosphere is achieved due to the formation of a thin transparent oxide film that protects the substrate from further oxidisation.
Attractive appearance, low maintenance, and light weight together with reflectivity are additional features of aluminium roofing materials.
Finishes available are plain mill finish, and stucco embossed finish which reduces glare.
Material Thickness
Common thicknesses for use as roofing and wall cladding are 0.70mm, 0.90mm and 1.2mm. The 0.70mm material is easily damaged in use and should be specified with caution.
Maintenance
Regular cleaning is required to maintain an unaffected surface for good aesthetic quality in industrial and marine environments.
This can be achieved naturally by rain washing but surfaces not adequately washed by rain must be cleaned by water washing and scrubbing with a soft brush at sufficient frequency to prevent build up of salt or dirt deposits. In severe marine locations the washing frequency may be every 4-6 months for surfaces not washed by rain.