Specify Steel Roofing & Walling

When specifying coated steel products, the following sections can be included in specifications to help ensure that products are purchased and installed as intended by the specification.

CORRUGATED ROOFING/WALL CLADDING

Where shown, corrugated roofing and wall cladding shall be custom length ZINCALUME® steel or COLORBOND® steel (profile name) roll-formed from strip complying with Australian Standard 1397 and branded accordingly. The finished product shall comply with Australian Standard 1445.

All roofing accessories shall be of similar material to the roof.

Minimum coating class of the metallic alloy layer shall be AZ150.

Fixing shall be to manufacturer's recommendations.

Sealants shall be neutral cure silicone rubber sealants.

During the fixing period swarf should be removed from the roof and guttering daily .

Copper or uncoated lead shall not be used for flashing.

Discharge from copper pipes shall not flow onto roof.

OTHER PROFILES - ROOFING/WALLCLADDING

Where shown, roofing and wall cladding shall be custom length ZINCALUME® steel or COLORBOND® steel (profile name) roll-formed from material complying with Australian Standard 1397 and branded accordingly.

Minimum coating class shall be AZ150.

All roofing accessories shall be of similar material to the roof.

Fixing shall be to manufacturer's recommendations.

Sealants shall be neutral cure silicone rubber sealants.

Swarf shall be removed from the roof and guttering daily.

Copper or uncoated lead shall not be used for flashing.

Discharge from copper pipes shall not flow onto roof.

RAINWATER GOODS

Where shown, eaves, guttering/spouting, ridge capping, box or valley gutters and downpipes shall be formed from ZINCALUME® steel or COLORBOND® steel complying with Australian Standard 1397. The finished product shall comply with Australian Standard 2179 and AS/NZS 3500.3. Base steel grade and thickness will depend on profile.

Coating mass shall be AZ150.

Accessories shall be of similar material to the gutter/spouting.

Downpipes shall be manufactured from ZINCALUME® steel or COLORBOND® steel.

Installation shall be to normal trade practice.

Sealants shall be neutral cure silicone rubber sealants.

CONCLUSION

It is in the best interest of the specifier and end-user of hot-dipped metallic-coated steel products to demand compliance with relevant Australian Standards. It should be noted that products do not necessarily have to comply with a standard unless compliance is claimed by statement, literature or branding, or if the specification or order call for it.

By combining the correct thickness of coating, base strength, associated materials and installation practice, the greatest potential value and performance are realised, often at no extra cost.