Aluminium Sheets

Alloy

Aluminium Alloy, is used in the production of roof and wall cladding panels, is EN AW 3105 which conforms to BS 3105 Alloy N31, and DIN 1725 Alloy Al Mn 0.05 Mg 0.50

Fire

Aluminium is classified as non-combustible material , as defined by BS 476: part 4: 1970. Roof Coverings of Aluminium alloy are rated EXT AA when tested in accordance with BS 476: Part 3: 1958.

Combining with other Material

These roof coverings can come in direct contact with plastics, galvanized steel, high-grade and pre-painted steel and zinc sheets.

Direct contact with ordinary steel, copper, brass and lead should be avoided by introducing a continuous separating element such as PVC tape,or bitumen felt strips or alternatively, painting with zinc chromate or aluminium paint. This also applies to direct contact with mortar and concrete.

Timber part which comes into contact with aluminium should be treated with impregnating agents which do not contain copper salts, mercury salts, phenol compounds or fluorine compounds.

Finishes

Mill Finish :- This is a natural untreated surface of the metal as it leaves the rolling mill.

Polyester Color Coated :- An economical, long life coating, factory applied polyester on the exposed side, and a lacquer coating on the reverse side . This is available in RAL as well as BS Color shades.