The product used by Proflex normally contains 55% aluminium, 43.5% zinc and 1.5% silicon by weight, and is best utilized for factory roof solutions because of its corrosion resistance and heat reflectivity properties. Silicon provides strong coating adhesion to the steel substrate when the product is drawn, roll-formed or bent during fabrication process.
|SUBSTRATE||ASTM A 792 D|
|YIELD STRENGHT(MPa)||350 ( minimum)|
|ZINC COATING(GSM/ Meter Square)||150|
|PAINT COAT||Regular Modified Polyester (RMP) Suitable for Roll Forming|
|TOP COAT||20-25 Microns|
|BOTTOM COAT||10-12 Microns|
Comparison Between Galvalume and Galvanised Steel
Here’s why GALVALUME roof is considered one of the best pre-coated steel products for roofing.
GALVALUME metal roofing is pre-coated with Aluminium, Zinc and Silicon, which makes it highly resilient with high reflectivity and corrosion resistance properties unlike Galvanized steel, which is only coated with Zinc. The coating thickness of GALVALUME sheet roofing is AZ 150 GSM, whereas Galvanized steel sheets are usually having only 120 GSM/m2 coating of Zinc.
GALVALUME roofing is highly corrosion resistant, and transmits heat at a rate of only 65 watt/m2 as compared to Galvanized steel, which transmits at a rate of 120 watt/m2. Moreover, GALVALUME roof is more suitable for extreme environmental conditions.