Monthly Archives: January 2013

Design the Best Standing Seam Metal Roof for Your Projects in Asia, Make Sure the Coil and Roll Former are Western Made

The United States imported more than four times as many goods from China as we exported there last year.

But our trade imbalance with China has gone the other way when it comes to professional services. Professional services, including architecture, constitute roughly a third of America’s exports, according to Architect Magazine, which notes many major American architecture firms now have offices in the largest Chinese cities, such as Beijing and Shanghai, as well as second-tier cities like Tianjin.Metal Roofing Roll Forming Machine

However, if you’re one of those design firms and you’re specifying metal roofs in Asia, beware! The quality of metal roofing coil and the roll forming machines made there are often greatly inferior to coil and machines made in the U.S. and in Western Europe.

Our in-house machine expert, Mike Gorski, has had the opportunity to visit other continents and see the different roll forming equipment made in places like China, the Middle East and Africa.  Mike’s take?  Most of these machines are poorly made and have a life expectancy of only a few years. And Mike emphasizes there is little or no training for operators and no machine service support in these markets to fix a faltering machine. Consequently, the result often is a poorly made panel on a faulty machine. Continue reading

Architects’ Notes: The Differences Between Galvalume And Galvanized In Metal Roofing Projects

Englert’s nationwide team of architectural sales reps spend a considerable amount of time each year counseling architects on which standing seam metal roofing products and profiles might work best for their design projects.  One of the questions most frequently asked by architects is: What are the differences between  Galvalume and Galvanized Steel when used in roofing. It comes up so often, we thought we’d take a few minutes and use this week’s blog to explain those differences.

First, a little bit of background. Galvalume® was invented by Bethlehem Steel in 1972. It is a trademarked name, but many people use it as a generic term to describe a metal roofing product consisting of  steel coil coated with a metal alloy. That alloy is 45% zinc and 55% aluminum and looks similar to galvanized steel, but the visible crystals are smaller and close together, giving it a smoother appearance.  Galvalume has a cousin, Galvalume Plus. The only difference is Plus has a thin, clear acrylic coating. Because Galvalume Plus can be roll-formed dry without vanishing oil, it is very easy to form and install safely.Galvalume metal roof peak with snow guards.

The combination of zinc and aluminum in Galvalume enhances both the positive and negative effects of aluminum.  Galvalume has barrier corrosion resistance and heat resistance similar to aluminized material and good bare edge galvanic protection and forming qualities like galvanized material. Consequently, Galvalume  and Galvalume Plus will resist rust, the elements and fire while providing a sturdy and protective covering.

Galvalume® is more corrosion-resistant than galvanized steel, but because aluminum provides barrier protection instead of galvanic protection, scratches and cut edges are less protected.  Galvalume is offered in both bare and pre-coated versions. Most Galvalume®–like galvanized steel– is coated. But Galvalume has an excellent performance life in bare exposures as well.  Both galvanized steel and Galvalume® weigh 100 to 150 pounds per 100 square feet and contain about 35% recycled materials. The cost of Galvalume and Galvalume Plus are about the same as that of galvanized steel. Continue reading

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