ZINCALUME^®

Zincalume® is a versatile product, ideal for roofing, wall claddings, gutters and downpipes, fences and garden sheds.

 Key Features:

A 55% aluminium and 45% zinc alloy coating that enhances corrosion resistance

Long-term corrosion resistance in many atmospheric conditions

Zincalume® coated steel has a finely spangled silvery matt finish.

Performance Attributes:

Zincalume® is an aluminium/zinc material coated to AS/NZS 2728 and therefore is consistent with the NZ Building Code for use in environment as described in Acceptable Solution E2/AS1 Table 20.

Standards:

• Steel substrate may be either G300 or G550 consistent with AS 1397:2011
• Metallic coating is AZ 150 consistent with AS 1397:2011
• Tolerances are consistent with the requirements of AS/NZS 1365:1996

Fire Resistance:

• Zincalume® is rated as a Group 1-S material and has an average specific extinction area of 3.8m2/kg.

Rain Water Systems:

•  Rainwater collected from roofs clad with products made from Zincalume® coated steel will comply with the provisions of NZBC G12.3.1, provided the water is not contaminated from other sources.
• The first 25 mm of rainfall from a newly installed roof must be discarded before drinking water collection starts. Where a paint or paint system is applied to the roof, its suitability for the collection of drinking water must be established from the manufacturer.

Zincalume® products are designed for use in moderate environments.

Limitations of Use:

Zincalume® is not recommended for the following applications:

• Intensive animal shelters, where the build-up of alkaline fumes may occur
• Swimming Pools, and other structures with continually wet internal environments
• Buildings with harsh internal environments such as galvanising plants, tanneries and meat works
• Fertiliser works
• Embedded in concrete
• In contact with soil, bark or similar
• Geothermal areas
• Culverts
• Highly alkaline environments (eg cement manufacture)
• Coolroom products

Before using Zincalume® products in these environments please consult us for a recommendation on 0800 697 833 or [email protected]

Copper or brass pipes must not be allowed to discharge onto or come into contact with Zincalume® steel products. The use of other materials in proximity to Zincalume® products must be carefully considered – the COLORSTEEL® Incompatible Materials bulletin should be used as reference.

Painting:

Zincalume® coated steel is readily paintable using good quality primers and water-based acrylic topcoats. Paint manufacturers' instructions should be followed. Dirt, grease and any loose materials must be cleaned off so the surface is clean and dry prior to the first coat being applied.

Handling & Storing:

The normal storage care, site cleanliness and installation procedures used for GALVSTEEL® products apply to Zincalume® steel products. Although passivation provides improved protection during storage, care should still be taken. If Zincalume® steel becomes wet during storage, the product should be immediately separated, wiped with a clean cloth and placed in a position where it can completely air dry.

Warranty

Zincalume® steel products are warranted in moderate environmental categories for roofing, wall cladding, spouting and fascia. Please refer to New Zealand Steel's Environmental Categories, Warranty and Product Maintenance Recommendations Brochure for further information.

Maintenance

All roofing and cladding products are subject to the cumulative effects of weather, dust and other deposits. Compared to galvanised steel, Zincalume® coated steel performs exceptionally well in areas not regularly washed by rainwater. However, as with any steel based product, regular washing of areas not naturally rain washed is essential to ensure that a satisfactory life is realised from the product.

Regular washing of steel products increases the durability by reducing attack from airborne salts and pollutants. Steel surfaces should be manually washed with water and a sponge or a soft nylon-bristled brush.