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

Furring Strips On Roof Deck?

Return to Installation

Return to Forum

Hi everyone, I am in the process of shopping for a new roof and I would like to install a standing seam metal panels. However my home was built in 1925 and over time the 2x6 rafters (17 ft span) have sagged in the middle. There aren't any split/snapped rafters or other structural damage to the roof, but I worry that it would be impossible to make an adequately in plane roof deck for metal panels. I have spoken to some local carpenters and roofers (Western North Carolina) and their suggestions have ranged from a complete roof rebuild, to shimmed furring strips, to choosing asphalt shingles instead. My question is: could furring strips provide an adequate substrate and plane surface for attaching snap lock standing seam roofing panels and if so what would an appropriate design/pattern look like. I welcome all questions and suggestions. Please let me know if there is additional information needed. Thanks all!
Guest User

10/8/2016
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/21567/find/
Purlins, done properly, could work. I would still prefer a solid deck for the moisture and condensation prevention benefits as well. Eric Novotny
Eric Novotny
An informed customer is the Best Customer!

10/8/2016
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/21568/find/
Thanks for your reply Eric. Would pressure treated purlins (seperated from the roof panels by some membrane) and a proper underayment help prevent condensation issues? I also plan on adding a ridge vent, athough I have heard different opinions on whether or not this will help with condensation issues especially in my climate. Thanks again.
Guest User

10/8/2016
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/21569/find/
In theory...yes. In practice, much more difficult to get sealed up and known to be problematic. By the way, you don't need PT in this case. Even venting the attic, I would still go solid decking. Spend the money and do it right. If you do, you will never change out the roof again and you will be happy with it. Eric Novotny
Eric Novotny
An informed customer is the Best Customer!

10/8/2016
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/21570/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
©2023 Metal Roofing Alliance. All Rights Reserved. Privacy Policy Terms and Conditions