Furnace Roof Exhaust Pipe Leaking

The roof vent pipe is installed cut through the roof and around the pipe attached to the roof is surrounded with rubber boot as insulation for the gap between the pipe and roof.

Furnace roof exhaust pipe leaking.

A standard efficiency furnace extracts some heat from the combustion gases and quickly vents them out the exhaust or flue pipe. Roof leaks around vent pipes is relatively common. Cut away the old caulk from around the vent pipe. There are many possible parts of the roof potentially leaking but one of the most common ones is the area around the roof vent.

Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe. Vent pipes penetrate all the way through the roof in several locations of the house and each one needs to be maintained to keep water out. To be more specific the pipe that comes out of the unit is attached to this leaking section which is attached to a pvc elbow then another piece of pipe. If you have a condensation leak with a standard efficiency then its exhaust or flue pipe may be incorrectly sized.

Use the knife blade to scrape the pipe clean and smooth. Apply a thick bead of lap seal caulk around the seam between the vent pipe and old rubber gasket. A roof that leaks around a vent pipe is a common cause of small water stains on a ceiling or water leaking into a home. The pipe leading to the main roof vent is called the vent stack.

The leaking may first be seen in the attic but if you don t catch it right away you may see water coming into the house dripping on the floor. Here s what to look for. There should be no water involved with a standard efficiency furnace. Today i noticed water leaking from a section of the pvc exhaust pipe which travels upward from the furnace across the ceiling and out of basement wall where it vents into my backyard.

It helps maintain proper atmospheric pressure in a building s waste system and channels the exhaust gasses to the vent. Steps for fixing a leaking rooftop vent pipe.