For Professionals | Member Login
Find a Professional
  • About Us
    • Member Companies
    • Leadership
    • MRA News
    • Homeowner Testimonials
    • Contact the MRA
    • For Professionals
  • Why Metal Roofing?
    • Benefits and Performance of Metal Roofing
    • Compare Roofing Materials
  • Homeowner Resources
    • Metal Roofing Buyers Guide
    • Metal Resilient Guide
    • Metal Roof Sustainability Guide
    • Above All Else You Need a New Roof eBook
    • Today’s Homeowner Partnership
    • Metal Roofing Visualizer
    • MRA University
    • Member Provided Resources
    • Frequently Asked Questions
    • Inspirational Metal Roofing Projects
    • Upcoming Events
  • Gallery
  • Ask The Experts
    • Energy Efficiency
    • I Have An Existing Metal Roof and Have A Question
    • 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: Insulation Concerns

Vapor control for metal roofing over SIP roof

Return to Insulation Concerns

Return to Archive

Return to Forum

This topic has been closed by the administrator. Comments are no longer accepted.
I have a new structure with 12 1/4" structural insulated panel roof at a 2:12 pitch. (The low pitch is due to code which requires me to retain the snow load.) There is no attic space to ventilate and the roofing must be applied to the top surface of the SIP. Even though the roof has an R value of 50 and there is 11 1/4" of EPS foam between the panels, I have heard war stories from people who suffered moisture damage to the top skin (1/2" OSB) of the SIP after a few years. Ice dams are a common problem in this climate. What I know is that I will have to put some Ice and Water barrier to deal with ice dams and I need to have some way to prevent condensation on the inside. These seem like contradictory requirements. How do you suggest I handle this situation? Thanks
Guest User

6/20/2009
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/13441/find/
I think your only safe way is to add a vented airspace on top of the SIPs, followed by decking, underlayment and roofing. Make certain that the roof you install is approved for that pitch. I would suggest a mechanically seamed standing seam. Todd Miller
Todd Miller
Isaiah Industries, Inc.

6/21/2009
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/13442/find/
  • About Us
    • Member Companies
    • Leadership
    • MRA News
    • Homeowner Testimonials
    • Contact the MRA
    • For Professionals
    • Subscribe
  • Why Metal Roofing?
    • Benefits and Performance of Metal Roofing
    • Compare Roofing Materials
  • Homeowner Resources
    • Metal Roofing Buyers Guide
    • Metal Resilient Guide
    • Metal Roof Sustainability Guide
    • Above All Else You Need a New Roof eBook
    • Today’s Homeowner Partnership
    • Metal Roofing Visualizer
    • MRA University
    • Member Provided Resources
    • Frequently Asked Questions
    • Inspirational Metal Roofing Projects
  • Gallery
  • Ask The Experts
    • Energy Efficiency
    • I Have An Existing Metal Roof and Have A Question
    • Metal Roofing Benefits
    • Product Selection
    • Other
    • Archive
©2018 Metal Roofing Alliance. All Rights Reserved. Privacy Policy Terms and Conditions