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Zincalume® Steel for Roofing
ZINCALUME® STEEL FOR ROOFING
Technical Data :
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Selecting products that suit the environment is important to ensure they perform as expected, and provide the life expectancy required. This not only includes selection, but ensuring other products used in combination are compatible.
How to select a steel grade for roofing:
There are many factors governing the selection of the recommended grade of COLORBOND® steel to use. Atmospheric factors and the nature of the activity within the building are among the most important. Like steel roofing, the performance of steel walling can be influenced by a number of factors, including the environment. In the case of walling, the most important factor to be aware of is unwashed areas.
Table 1 below serves as a guide for selection in marine environments.
ZINCALUME® steel is also suitable for light industrial environments however where the product is subject to heavy fallout, acid, alkali laden air or other corrosive chemicals please contact BlueScope Steel Direct for advice on the recommended product and fasteners to use. This also applies to harsh service activities carried out within buildings such as intensive animal farming and indoor swimming pools.
Table 1: Recommended CSA Product Guide for Roofing in Marine Environments
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| Severity |
Approximate Distance From Marine Influence |
Recommended Product |
| Very Severe |
<100m from breaking surf
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COLORBOND® Stainless steel |
| Severe |
100-200m from breaking surf
50-100m from calm still water*
(e.g. protected harbour)
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COLORBOND® Ultra steel |
| Severe |
200m - 400m from breaking surf; or
50 - 100m from calm still water (e.g. harbour)
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COLORBOND® XRW steel or ZINCALUME® steel |
| Moderate |
>400m from breaking surf
>100m from calm salt water (e.g. harbour)
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COLORBOND® XRW steel or ZINCALUME® steel |
| Benign |
> 1000m from breaking surf; or > 500m from calm still water (e.g. harbour) Benign |
COLORBOND® XRW steel, or ZINCALUME® steel
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Note:
- Absolute performance is subject to local conditions (eg prevailing winds) and unwashed areas (i.e. regions of the roof not naturally washed by rain).
- Above table applies to roofing product only.
- The above table applies to salt marine influences only. For installations subject to severe, heavy industrial conditions, it is essential to consult a BlueScope Sales Office for advice on the appropriate product. Please contact BlueScope Steel Direct for more information.
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