A large range of aluminium windows and doors are manufactured for those homes where planning and selection call for dimensional stability combined with maximum glazing area. Aluminium is a very versatile material that doesn't require painting. It won't warp or rot and an occasional wipe over with a damp cloth maintains it in a clean condition. With its unique combination of strength and lightness, aluminium enables frames, sashes and fittings to be neat and unobtrusive; permits maximum entry of light and allows an unobstructed view.
Aluminium metal is extracted from an ore high in alumina hydrate abundant in Australia - which is called bauxite. This bauxite is treated with hot caustic soda which dissolves the alumina hydrate in the ore and leaves behind a insoluable impurity know as "red mud". The alumina hydrate is precipitated from the solution, filtered and dried at high temperatures in kilns to form aluminium oxide from which aluminium ingots are produced for varying end products.
One of these, known as the extrusion ingot, is homogenised in a special heating furnace to ensure an even distribution of elements throughout the ingot. The extrusion ingot billets are then heated and pushed under tremendous pressure through a die. Intricate shapes are extruded to close tolerances suitable for window and door framing.
A variety of finishes, both protective and decorative may be applied to the extrusions, including bronze anodising, brown, white and cream powder coating.
If building within 2kms of seafront locations it is strongly recommended that only powder coat finishes be used. (This finish has a minimum thickness of 50 microns with proven test results of resistance to salt air. Bronze anodising however, has only a surface finish of 10 microns).
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