For Professionals | Member Login
Find a Professional
  • Why Metal Roofing?
    • Benefits of Metal Roofing
    • Compare Roofing Materials
    • Homeowner Testimonials
    • Inspiring Metal Roofing Projects
  • Homeowner Resources
    • Metal Roofing Buyers Guide
    • Resilient Housing Guide
    • Metal Roof Sustainability Guide
    • Above All Else You Need a New Roof eBook
    • MRA News
    • Member Provided Resources
    • Frequently Asked Questions
  • Gallery
  • Visualizer
  • Ask The Experts
    • Energy Efficiency
    • Existing Metal Roof Questions
    • Installation
    • Is A Metal Roof Right For My House
    • Metal Roofing Benefits
    • Product Selection
    • Other
    • Archive
  • Find a Professional
For Professionals Member Login
Sign Up Log In Add New Topic

TOPIC: General Discussion

Galvanized cut edge corrosion

Return to General Discussion

Return to Archive

Return to Forum

This topic has been closed by the administrator. Comments are no longer accepted.
On average, how much rust should I expect at the eave edge of my prepainted galvanized roof over a period of 20yrs under normal conditions? (not an animal confinement, not near salt water, rural location, 4:12 slope. 1/4", 3/4", 2" in??
Martin Thompson

10/22/2007
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/10417/find/
I'm not sure how extensively this has been measured. There is no limitation to this. Galvanized, prior to being painted, typically does not come with a warranty. Many manufacturers have moved away from Zinc galvanization on their steel to zinc-aluminum to extend the protection. In our standing seam systems, we hem the panels at the eave to hide them. There are studies available: search galvanized vs. galvalume.
Brian Selig
Architectural Building Components Metal Roof and Wall Panels

10/24/2007
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/10418/find/
I really do not think there is anything verifiable in regards to this either. There are also so many variations in terms of grades of steel and coatings. Todd Miller
Todd Miller
Isaiah Industries, Inc.

10/24/2007
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/10419/find/
  • About the MRA
    • Member Companies
    • Leadership
    • MRA News
  • For Professionals
    • Join the MRA
    • Industry Resources
    • Upcoming Events
  • Contact
  • Subscribe
©2018 Metal Roofing Alliance. All Rights Reserved. Privacy Policy Terms and Conditions