Ask Todd Miller *Metal Roofing Expert

Leaking Skylight in Metal Roof

Written by Todd Miller on August 7, 2009 | Filed under: Misc,Roofing Answers

I received the following question:
I had a metal roof installed over existing shingles two years ago. I have continued to have a laeking problem on my carport 10-15 feet below an old sky light. I had it re-flashed but still have some leaking below. I suspect water above the skylight somehow permeates and gets under the roof and leaks below on the carport. The installer blames it on the need for a new skylight. Any ideas?

My response:
Probably about 30% of all problems I see with skylight leaks are indeed related to the skylight itself. Probably about 30% are related to a problem higher up on the roof such as at the ridge, a pitch change, or a pipe where water is getting under the panels and running down on top of the underlayment until it hits the skylight and then enters. The remaining 40% are due to improper flashing of the skylight.

Send me pictures of your skylight and roof if you like for further input. You can email me at

Thank you.

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About Todd

Todd's expertise comes from his years of experience in metal roofing manufacturing. As president of Isaiah Industries, based in Piqua Ohio, Todd runs a several of the world’s leading manufacturers of residential metal roofing; Classic Metal Roofing Systems, Kassel & Irons, and Green American Home. His personal goal is to educate homeowners of the long-life benefits of metal roofing.

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