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: Ventilation

Metal Roof over Old Bermuda Roof

Return to Ventilation

Return to Archive

Return to Forum

This topic has been closed by the administrator. Comments are no longer accepted.
We have an older Bermuda roof (2'X 8' plywood, overlapped). There is some rot on the old roof in various places. Can we install a metal roof over top without removing the old roof and expect a ridge vent to effectively dry out the old roof underneath? Also, would it help to drill multiple holes through the old roof to improve airflow up from soffits, through roof and out ridge vent?? thanks -Ed
Ed Sanden

10/30/2006
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/8855/find/
Rot never goes away. You can dry it out but the moment it gets any moisture it comes back to life. Next comes the building codes in FL. If you are in a high wind area, they require that the sheating be a certain thickness with fastening requirements. Check with the local building department. My recommendation would be to remove the old roof covering and install new to the code. Chooses a metal roof system that stands off the decking and vent the air space at the eave and ridge. Choose a light colour and combined you will save big on your energy bills and have a home that is a lot cooler in the summer months.
Allan Reid
Dura-Loc Roofing Systems, Inc.

10/31/2006
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/8856/find/
Thanks. btw, do you know how long "peel and seal" the black tar paper like stuff can last exposed to the elements before the final roof material is put on top? Will the peal and seal deteriorate over time? quickly? thank you.
Guest User

2/4/2009
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/8857/find/
The time you can wait until installing the panels depends on the brand of peel and stick. Some recommend immediate installation, while others say you can leave it on up to 6 months before putting down the metal. Check with the manufacturer of your particular peel and stick.
Nate Libbey

2/4/2009
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/8858/find/
Thanks Todd Miller
Todd Miller
Isaiah Industries, Inc.

2/7/2009
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/8859/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