Join the MRA | Member Login
Find a Professional
  • Why Metal Roofing?
    • About MRA
    • 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
    • 3rd Party Articles
    • Frequently Asked Questions
    • Preparing for Hurricane Season
  • 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
Join the MRA Member Login
Sign Up Log In Add New Topic

TOPIC: Installation

Decking for metal roof

Return to Installation

Return to Forum

Looking to replace storm damaged roof on a 26'x26' stand alone wood frame work shop building with 0.75"/12" pitch Plan to use R panel and caulk all over laps. I know its iffy doing metal on that low of pitch and would like some feed back on doing it with metal. Roof formally was done in roll roofing and has been replaced several times. Which leads me to the next question since the decking needs to be replaced and I would like to go with radiant barrier would it be best to go with 1/2" plywood or 19/32" OSB? I've read that plywood has better screw holding over OSB in one metal roof install manual (ie: on 24" centers 1/2" ply has 51 psf vs 19/32" OSB is only 38 psf. I've ruled out wood purlins for this project in favor of radiant barrier decking due to the heat issue I've had with this building, but what ever I do it needs to meet 120 mph wind requirements.
Steve Decatur

1/21/2018
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/22791/find/
In my experience, plywood is more reliable in the long run though both have similar fastener holding power initially. For that low of pitch, the only metal roof I can recommend is a mechanically seamed standing seam with concealed clips and screws. I can not even remotely condone anything else. Todd Miller
Todd Miller
Isaiah Industries, Inc.

1/21/2018
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/22792/find/

If you would like to reply to this thread, please log in. If you do not have an Ask the Experts forum user account, create one here.

  • 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