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: I Have An Existing Metal Roof and Have A Question

Insulation no decking

Return to I Have An Existing Metal Roof and Have A Question

Return to Forum

I have a 30 year old house with a metal roof. There is no plywood decking. There is insulation on the floor of the attic, but not on the metal roofing itself. Is this correct, or can I insulate the underside of the metal itself? I can't tell if there was insulation next to the metal originally and has fallen away over the years due to some water leaks and repairs. Please advise.
Janet Field

6/5/2014
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/19548/find/
You could insulate this and, if you do, I would suggest a closed cell spray urethane foam system. Other insulations, especially if not done with a solid vapor barrier, could trap moisture against the bottom side of the roofing which would be harmful. I will say this though ... my suggestion for your climate is to ventilate the attic as much as you can and then add insulation on top of your ceilings rather than beneath the roof. Todd Miller
Todd Miller
Isaiah Industries, Inc.

6/5/2014
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/19549/find/
Janet, If the roof is currently vented (i.e. the attic is not a conditioned space nor used as one), don't bother. Leave it as is and use a proper roof with the right emissivity for your area and climate. Make sure the insulation is up to R-50 and air seal the attic floor. Eric Novotny
Eric Novotny
An informed customer is the Best Customer!

6/6/2014
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/19550/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 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