3-2-10 Rule
- Todd Engle
- Dec 2, 2022
- 1 min read
Chimneys should extend at least 2 feet higher than any portion of a building within 10 feet, but not less than 3 feet above the highest point where the chimney passes through the roof. This is known a the 3-2-10 Rule for Chimneys.
Type L venting systems should terminate with a listed and labeled cap at least 2 feet above the roof and at least 2 feet above any portion of the building within 10 feet. This is known as the 2-2-10 Rule for Type L Vents.
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