AZ150 or AZ200. Which one is the one to use? AZ roofing material is coated with 55% aluminium, 43.5% Zinc and 1.5% Silicon also referred to as 55% Aluminium-Zinc coating technology. The coating is available in either AZ150 or AZ200. This means that either each square meter is coated with at least 150gm/m2 or 200gm/m2. […]
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