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|“Leaky” Exhaust Vents – The 500-lb Gorilla of Condensation Problems|
Contributing Author: Phil Dregger - PE, Technical Roof Services
This article will explain why complete discharge of exhaust air - especially gas combustion products - is so important, will review code requirements for termination of exhaust vents, identify tell-tale signs of existing condensation problems, and will offer ways to avoid exhaust vent-related condensation problems.
Although broken or disconnected exhaust vents can pose an even more serious problem, this article will focus on how improper termination of exhaust vents can contribute to excessive condensation in low-slope membrane roofs. All photos in this article are courtesy of DNG Group Companies - Technical Roof Services and Pacific Building Consultants - and show projects located in California in ASHRAE Climate Zone 3. CLICK HERE TO CONTINUE...
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