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Glenn Mathewson

Glenn Mathewson is a certified code professional and a building inspector for the City of Westminster, Colo., and a frequent presenter at JLC Live.

Glenn Mathewson's Posts

Replacement Windows and the Code Replacement Windows and the Code

New provisions deal with EERO and fall-protection heights Read more

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Maximum Length for Fixture Drains Maximum Length for Fixture Drains

To prevent a siphon from forming, make sure the drain pipe connects with the vent above the level of the trap weir. Read more

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Step Flashing vs. Continuous Flashing Step Flashing vs. Continuous Flashing

Do a little homework before abandoning the decades-long practice of using step flashing with asphalt shingles. Read more

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Installing Continuous Flashing Installing Continuous Flashing

Code specialist, Glenn Mathewson, takes a look at a recent IRC provision allowing alternatives to traditional step flashing. Read more

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Neutral Necessity: Wiring Three-Way Switches Neutral Necessity: Wiring Three-Way Switches

In the latest National Electric Code, every switch box in a habitable room or bathroom must now have a neutral (more accurately referred to as a “grounded conductor”). Read more

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