EDITORIAL Materials
The role of zinc
in building and construction Simon Norton, International Zinc Association Africa Desk
Zinc (Zn) is used in architectural applications for rainwater systems, cladding and roofing, and alloyed with copper and titanium. This combination of metals maximises tensile strength, malleability and load bearing capacity. Zinc sheet and plate develops a natural patina when exposed to carbon dioxide-rich air. The patina protects the sheet metal from rust, salt and other natural forces. Zinc panels can last up to 50 years under the right conditions.
(bright), pre-weathered and pigmented finishes. Zinc sheets can be formed into shingles, cassette panels and flat-lock panels to clad any building-style. This lightweight and shiny metal has long been used in constructing roofs and for vertical cladding.
Zinc is an ideal standing seam roof material and can be applied to many different roof types. It comes in natural
Can last up to 100 years
62
Since the 18th Century, zinc has been commonly used in
www.sabuildingreview.co.za