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

Reinstalling a leaking valley

Return to Installation Process

Return to Archive

Return to Forum

This topic has been closed by the administrator. Comments are no longer accepted.
A valley on our TN farmhouse dormer is leaking. The roof is 5V tin with pre-molded metal valley flashing, but the roof has no solid decking and is just installed over 1x4 strips of wood on 1 ft centers. During particularly heavy rainstorms the water is working its way in over the outer edges of the valley flashing. A contractor has siliconed it 4 times it but the leak just moves further up or down the valley! If we rip it out and re-install it, what type of underlayment do we need to help with the waterproofing (in addition to solid decking)?
Guest User

5/21/2004
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/3176/find/
Sometimes, problems like this may actually originate higher up on the roof rather than at the valley. Anyway, 30-pound felt covered with a slip sheet (red rosin paper) would be appropriate, or any of the newer polymer-based underlayments.
Guest User

5/21/2004
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/3177/find/
  • About the MRA
    • Member Companies
    • Leadership
    • MRA News
  • For Professionals
    • Join the MRA
    • Industry Resources
    • Upcoming Events
  • Contact
  • Subscribe
©2023 Metal Roofing Alliance. All Rights Reserved. Privacy Policy Terms and Conditions