So what exactly is Galvalume roofing?
-- Galvalume is made up of 55% aluminum and 45% zinc alloy coated sheet steel.
How is Galvalume made?
-- Both Galvalume and galvanized sheet steels are made by a "continuous hot dip" process. Coils of cold rolled steel are welded end-to-end and processed continuously on the coating line at speeds up to 600 feet per minute. The uncoiled sheet is first cleaned to remove rolling oils and mill dirt, and to reduce surface oxides so that the surface will accept the coating. As it exits, the sheet proceeds through a pair of opposing air knives, which are positioned above the bath and equidistant from the surface of the sheet. Most modern production lines have a coating thickness gauge feed-back control, which automatically adjusts knife air pressure and position to ensure that a uniform coating is applied. Various finishing steps are carried out to complete the process, after which the sheet is wrapped around a reel into a coated steel coil.
Why is it good to use for roofing?
-- Galvalume sheet is an ideal material for roofing because of its extraordinary outdoor corrosion resistance and resulting long life. It can be readily rollformed into a variety of panels, as well as formed and stamped into tile and shingle facsimiles. It can be used in modern day steel roof designs which are strong, yet light weight. Galvalume sheet roofs won't crack and peel when subjected to the sun and weather, unlike conventional nonmetallic roofing.
What is the reflectivity of Galvalume roofing?
-- Galvalume has good heat and sunlight reflectivity. Its bright, white reflective surface makes it an ideal material for roofing. During the summer it makes buildings cooler by efficiently reflecting away sunlight and reducing the amount of heat transmitted into the building. Likewise, it makes buildings warmer in the winter by reflecting inside heat from the underside of the roof back into the building. This good thermal reflectivity translates into energy savings by reducing cooling costs in the summer and heating costs in the winter. Tests have shown that only half as much heat from solar radiation is transmitted into a building fitted with Galvalume roofing.
What are the advantages to purchasing Galvalume roofing over a built-up roof?
-- Leaking conventional, flat non metallic roofs are the biggest problem on nonresidential buildings for architects and building owners. Conventional roofs made with organic materials deteriorate even under normal environmental conditions. Then, as a result of temperature fluctuations, they develop cracks, splits and tears. Finally, because they are flat, ponding water inevitably penetrates these brittle, cracked systems and leaks into the building, causing damage to goods and disrupting activities inside the structure. Leaks can be patched early in the life of the roof, but as time passes, leaks can become more frequent. With that being said, Galvalume standing seam roofs (SSR) offer a weathertight, maintenance-free roof system that will last for decades on commercial, office and factory buildings. They are economical to install, leak proof, maintenance-free, energy efficient, noncombustible and long-lived.
Can a Galvalume SSR be installed over an old flat built-up roof?
-- Its light weight makes it suitable for retrofit applications over any old, leaking, conventional, nonmetallic roof system. By installing the roof directly over the existing nonmetallic roof, costly and time-consuming tear-offs are eliminated, and activities inside the building can continue without interuption.
**Always feel free to ask any questions you may have about any metal roofing products!
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