Archives: FAQs

GALVALUME sheet has been successfully used in roofing applications for more than 50 years; it has been evaluated in outdoor R&D tests for well over 60 years. Based on these tests, in which corrosion weight losses were measured and compared with galvanized, GALVALUME sheet is projected to outlast galvanized sheet (with an equivalent coating thickness) … How does the corrosion resistance of GALVALUME sheet compare with that of galvanized sheet, and how long can a GALVALUME sheet roof be expected to last?

Regarding warranties, a purchaser needs to consider the two types of GALVALUME roofs that are used – structuraland architectural systems. Structural systems are those, such as SSR, that are installed directly on the roof structural system (i.e., purlins), without decking. These are low slope systems, up to about 1:12 pitch, using bare, heavier gauge GALVALUME … Are GALVALUME roofs offered with a warranty?

A GALVALUME SSR is an ideal system for retrofit roofing. Its light weight makes it suitable for retrofit applications over any old, leaking, conventional, nonmetallic roof system. Retrofitting is accomplished by installing to the existing roof structure a light weight sub-framing system, generally made with light structural steel sections, that provides a minimum ¼:12 slope … Can a GALVALUME SSR be installed over an old flat built-up roof?

Leaking conventional, flat nonmetallic 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. They embrittle from the heat and ultraviolet radiation from the sun. Then, as result of temperature fluctuations, they develop cracks, splits and tears. Finally, because they … What are the advantages of a GALVALUME standing seam roof (SSR) comparted to a built-up roof?

GALVALUME sheet 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 … What is the reflectivity of GALVALUME sheet?

GALVALUME sheet is made to meet ASTM Specification A792. This specification covers several requirements, including coating weight. AZ50 and AZ55 are the English unit coating weight designations indicating that, respectively, 0.50 ounces per square foot and 0.55 ounces per square foot of the aluminum-zinc alloy coating have been applied to both sides of the GALVALUME … GALVALUME sheet is sold with AZ50 and AZ55 designations. What do they mean?

GALVALUME sheet is an ideal material for roofing because of its extraordinary outdoor corrosion resistance and heat reflectivity which results in its long service life and helps keep the inside of the building cooler. It can be readily rollformed into a variety of panels, as well as formed and stamped into tile and shingle facsimiles. … Why is GALVALUME a good material for roofing?

Like galvanized, GALVALUME sheet steels is made by a “continuous hot dip” metal coating process. Cold rolled steel coils are welded end-to-end and processed continuously on the coating line at speeds up to 600 feet per minute. The uncoiled steel is first cleaned to remove rolling oils and mill dirt, and to reduce surface oxides … How is Galvalume made?

Generically, the metal alloy coating’s composition is 55% aluminum-45% zinc alloy coated sheet steel developed by Bethlehem Steel and sold commercially under the trademark GALVALUME, starting in June 1972. Bethlehem Steel later licensed other major steel companies to produce and sell the product using its patents and technology. In North America, the GALVALUME trademark is … Why is GALVALUME sheet called by other names? Are All of these products the same?