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 Process

reflective insulation

Return to Installation Process

Return to Archive

Return to Forum

This topic has been closed by the administrator. Comments are no longer accepted.
1) I plan to install a metal roof (3/4" high major rib, 9" o.c., 36" coverage panel), over existing comp shingle roof. Is it beneficial to laydown 30# felt and a reflective insulation (double bubble, foil/poly)? 2) Do you recommend any paticular reflective insulation to lay between existing comp roof, 30# felt and the new metal roof? There seems to be several available ie bubble, solarguard, foil paper. 3) Would it benefit to laydown 1x4 wood or steel hat channel on top of all this, then apply the metal panels? 4) How far apart should each screw line be? Thanks.
Guest User

1/23/2008
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/10846/find/
1) You definitely want an underlayment over the existing shingles and perhaps a slip sheet. Your roofing manufacturer should specify this. 2) No particular recommendation. A radiant barrier in the attic may be more effective though. 3) If you did this, you must be installing a metal panel that is approved for installation over battens. Not all are. 4) This will vary from panel to panel -- check mfr specs. Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/6/2008
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/10847/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