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: Skylights and Bay windows

Skylight and Roof Vent 101

Return to Skylights and Bay windows

Return to Archive

Return to Forum

This topic has been closed by the administrator. Comments are no longer accepted.
Hello, Looking for a little basic theory put in laymen's terms about flashing, transitions and edges with metal roofing. I'm sure most of you remember this? Both the skylight manufacturer and a custom flashing/metal roof parts company have told me that this type of **self-flashing skylight** will not work with a metal roof and was primarily designed for comp shingles. Many have told me that a curb mounted skylight or vent is the ONLY method to use with metal roofing. Also, the ONLY method described in the ASC specs appears (with my limited grasp) to be for a curb mounted skylight. So the question at this point is if I rip these out and eat the cost OR attempt to make my own custom flashing? After all, the other Velux skylights we are installing on a different pitch are deck mounted but come with a multi piece flashing kit specifically designed for metal roofing. Why couldn't I just have a sheet metal shop produce something that accomplishes the same thing for the two problematic self-flashing 2'x2' bubbles? I realize it is never a good idea to go outside that manufacturer specs, but by that same logic, wouldn't the Velux models be considered outside the ASC spec by that methods omission from the plans? I have no doubt, however, that the Velux models will work and never leak. Can a method of flashing (keeping in mind the pictures from the link) be created for these self-flashing 2'x2' bubbles? Yes? No? Or is my only route is to rip the suckers out and put in a curb type skylight? Also, should I replace the vents with curb mounted roof vents too? Thanks for your patience, Tim
Guest User

10/10/2003
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/2324/find/
It should be possible to build up a curb and flash it appropriately using these skylights. Todd Miller
Todd Miller
Isaiah Industries, Inc.

10/12/2003
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/2325/find/
What should be used? An asphalt shingle contractor told me that the standard practice for metal roofs is to use silicon, and that it doesn't hold up.
Lee Harp

7/19/2004
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/2326/find/
The standard practice is to have a skylight on a curb with roof flashing which extends up the sides of the curb and under the "cap" of the skylight. This flashing then extends out from the sides of the skylight for 12" or so and also up above the skylight for 18" or so, being received under the underlayment. On horizontally-run metal roof panels, the top and side flashings are made so that they bring water back out on top of the roof panels. On vertical run metal roofing panels, the panels lay on top of the flashing and, on the sides, a second flashing is installed on top of them. The downhill side flashing runs up the curb and also out and across the roofing.
Guest User

7/19/2004
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/2327/find/
Hey would you be able to make a diagram of what you feel is correct.
Guest User

6/21/2010
Share
Or copy this URL: https://www.metalroofing.com/spirit/comment/2328/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