Galvalume is a coating consisting of zinc, aluminum and silicon that is used to protect a metal (primarily steel) from oxidation. It is similar to galvanizing in that it is a sacrificial metal coating which protects the base metal.
Galvalume's corrosion resistance far exceeds that of galvanized, is suitable for applications where rust prevention is imperative, has superior flatness, uniform spangle and is an excellent surface suitable for painting. Galvalume has a highly reflective, silver spangled color which weathers in unique patterns over the life of the roof for a rustic, natural appearance.
Galvanized steel is regular steel sheets that have been coated in zinc to make them corrosion resistant. Regular steel is made of iron which will rust when exposed to moisture, either in the form of rain or ambient humidity.
Strip steel or cold rolled strip is a steel product that is produced from a hot rolled strip that has been pickled. The coil is then reduced by a single stand cold roll steel mill straight away or reversing mill or in a tandem mill consisting of several single stands in a series.