Climb up on your rooftop and find the point where the stovepipe exits the roof. Ask a friend to complete this step with you for safety. One person should steady the ladder while the other climbs to the roof.
Check the height of the stovepipe from the base of the roof. To thwart downdrafts, the top of the stovepipe should measure a minimum of 3 feet above a flat roof, 2 feet above a roof ridge and at least 10 feet, horizontally, from any other roof structure.
Increase the height of an existing stovepipe to make it comply with minimum height requirements. Add one or more sections to it. Stovepipe sections measure 24 inches long. Insert one end of a new pipe into the existing pipe to complete an extension.
Install a stovepipe cap to remove or lower the chances of downdrafts produced by wind turbulence. Slip a stovepipe cap over the top of the stovepipe and tighten each of three set screws to secure it.
Things You Will Need
- Measuring tape
- Stovepipe section
- Stovepipe cap
- Check to ensure the stove's flue works properly before climbing onto the roof.
- Wear work gloves when handling stovepipe sections as the edges are sharp.