Proper Clearance Between Chimney And Roof

Chimneys should extend upwards.

Proper clearance between chimney and roof.

A clearance gap of inches is required between a manufactured chimney and combustibles. The proper name for the connection between a manufactured chimney flue and the. This will generally cause you fewer problems as a homeowner. The edge of the roof has thin metal flashing that helps water drip off the roof without damaging the home or causing a leak.

A rain cap or deflector is required on all manufactured chimneys. If you ve been researching class a chimney pipes you ve probably heard of the 3 2 10 foot rule numerous times. This article series describes b vent metal chimneys used for gas fired appliances. This guideline is the same for exposed naked chimney s as it is for enclosed chimney s in a chase.

Any portion of a masonry chimney located in the interior of the building or within the exterior wall of the building shall have a minimumair space clearance to combustibles of 2 inches 51 mm. When passing through the roof you need to use a flashing that matches the roof pitch. The 10 2 rule is the guideline for determining the amount of chimney required for proper operation and draw of your wood burning fireplace or stove. One of the most important aspects of the planning process is installing the proper amount of chimney pipe above the roof.

What is the 2 foot 10 foot 3 foot rule. The plan on the left shows a code compliant chimney through floor or roof framing with a 2 air space between the masonry chimney walls and the combustible framing. The difference between a chimney cap and. This guideline has 3 main.

Masonry chimneys must terminate. We discuss fire safety fire clearances and other gas appliance venting details for b vent chimneys. Open valleys have metal flashing to protect this critical area of the roof. And a rain cap protects the inside of the flue.

This rule refers to the proper height of the chimney pipe above the roof. While some skylight manufacturers include flashing in their products sometimes roofing professionals have to create it or purchase it separately. Determine proper chimney height using the 10 2 rule. Type b vents ceiling floor wall clearances b vent clearances to combustibles clearance distances for a b vent to combustible materials in floors walls ceilings attics roofs.

Masonry chimney clearances ibc code change proposals s232 12 and s237 12 by jim buckley chair. Chimneys located entirely outside the exterior walls of the building including chimneys that pass through the soffit or cornice shall have a minimum air space clearance of 1 inch 25 4 mm. At least 3 feet above the highest point of contact with the roof structure the vertical green arrow in our sketch at left and. Positing a chimney on the home relative to the rest of the home may cause it to draw better.

Masonry chimney roof clearance requirements. The sketch at left shows the proper minimum chimney height and roof clearances for a masonry chimney.