Leaking Skylight in Metal Roof

August 7, 2009 | Filed under: Misc, Roof Repair, Roofing Answers, Roofing Installation

Q: I had a metal roof installed over existing shingles two years ago. I have continued to have a leaking problem on my carport 10-15 feet below an old skylight. I had it re-flashed but still have some leaking below. I suspect water above it 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?

A: 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 todd@asktoddmiller.com

Thank you.

todd Miller

has spent his entire career in the metal building products manufacturing industry. He is president of Isaiah Industries, an organization recognized as one of the world’s leading metal roofing manufacturers. Todd is currently Vice President of the MRA (Metal Roofing Association) and a Past Chair of MCA (Metal Construction Association). Through his website, he strives to raise the bar on standards and practices to provide property owners with the best possible products for successful roofing projects.

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