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: Roofing over existing roof

Installing metal roof over rolled asphalt

Return to Roofing over existing roof

Return to Archive

Return to Forum

This topic has been closed by the administrator. Comments are no longer accepted.
Hello, my father and I are planning on installing metal roofing at our cabin. He has purchased the vertical panel type in 12' lengths. Right now, the cabin has rolled asphalt roofing. Is it alright to put down some heavy roofing felt and install the metal roof right over the older asphalt? Should we install some sort of wood slats before installing the metal roof? Thanks for any help...
Guest User

8/15/2002
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/868/find/
First, I would strongly urge you to follow the manufacturers' instructions as they pertain to installtion. Generally, many of these products were originally designed for installation over an airspace. If that is done, you ought to consider running vertical battens first and then horizontal battens. This would create a soffit to ridge airspace that could be ventilated for maximum efficiency. That said, though, these products are often installed direct to decking or over old shingles. In either case, you need a layer of underlayment such as 30 - pound felt or a poly-based underlayment. Particularly if you go over the old shingles, this would protect the back of the metal from the mineral surface of the old shingles. If the old rolled roofing is in real bad shaped, that could negatively affect installation of the new products and I would suggest removing it first, or perhaps putting some fasteners in it to get it to lay flat. Todd Miller
Todd Miller
Isaiah Industries, Inc.

8/16/2002
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/869/find/
can i do this myself and at about what cost compared to aspalt
Guest User

8/22/2002
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/870/find/
You can visit local lumberyards and home centers to inquire about metal roofing they offer. You can also contact manufacturers through this site. Some products are available for homeowner installation. Based upon your roof configuration and the installation requirements of the product you choose, you'd have to decide whether you want to invest the time in installing it. In some cases, you may need a few special tools. As far as price, because the Metal Roofing Alliance is a coalition of competing manufacturers, our antitrust guidelines prohibit us from discussing price in a public forum such as this. Any of the above sources, though, could supply pricing details to you. Todd Miller
Todd Miller
Isaiah Industries, Inc.

8/23/2002
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/871/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