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Tricks Of The Trade: Roof Leaks

Written by Tricks Of The Trade Columnist. Posted in Ask The Expert, Columnists, Exteriors, Featured Post, Magazine, Topics, Tricks of the Trade

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Published on December 12, 2012 with No Comments

By B. Kevin Folsom, CEP
Published in the November 2012 issue of Today’s Facility Manager

Q We have instances of leaks at the metal roof to HVAC curb on a minimum 2/12 sloped roof. Because the International Building Code (IBC) requires the equipment to be supported against any seismic action, the HVAC equipment must not move with the roof plane. The metal roof plane can expand and move approximately 3⁄4″ from the bottom edge to the top ridge. Do you have any recommendations for flashing this HVAC unit? Is a double curb the only way to approach this situation?

A Roof leaks always find their way to the detail areas. This is where real roofing skill is needed along with close attention to detail. An organization I have found to be very useful over the years is the National Roofing Contractors Association (NRCA). I have even sent staff members to its roofing institute. My advice would be to submit your question to this page. Even if you had to pay a fee, it would be worth it. Never underestimate the importance of a roofing system and don’t take short cuts. I almost always use an independent building envelope design consultant for new and replacement commercial roofing. [Read more about roof maintenance strategies here.]

About Tricks Of The Trade Columnist

Tricks Of The Trade Columnist

Folsom is director of campus operations at Trinity Christian Academy in Addison, TX. Previously, he was director of facilities & plant operations, and energy procurement & efficiency at Dallas Theological Seminary in Dallas, TX, where he worked for 25 years. He is the recipient of numerous awards from the associations of Higher Education Facility Officers and Energy Engineers for facility and energy management practices, industry leadership and involvement, and writing. He has also provided facilities assessment consulting to several organizations through All questions have been submitted via the “Ask The Expert” portion of the magazine’s web site. To pose a question, visit this link.

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