Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Britannica Sources used in this answer

Which elements are added to zinc sheet to make stronger roofing materials?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
A labeled diagram of the periodic table entry for zinc, showing its atomic number 30, symbol Zn, atomic weight 65.38, electron configuration, name, hexagonal crystal structure, solid state at room temperature, and classification as a transition metal.
zinc

To create stronger roofing materials, small amounts of copper and titanium are added to zinc sheet.123

These additions significantly improve the material's performance by restricting grain movement, which provides much better creep resistanceā€”the ability to resist permanent deformation under the continuous application of stress. Because these alloys maintain a fine grain size, they also retain good ductility, making them suitable for various construction processes such as bending, stamping, and cutting.13

Additionally, for industrial roofing and cladding, a highly corrosion-resistant alloy known as Galvalume is used, which consists of 55 percent aluminum, 43.5 percent zinc, and 1.5 percent silicon.4