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.

Furnace roof exhaust pipe leaking.

If you have a condensation leak with a standard efficiency then its exhaust or flue pipe may be incorrectly sized. 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. Steps for fixing a leaking rooftop 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.

There should be no water involved with a standard efficiency furnace. Roof leaks around vent pipes is relatively common. Cut away the old caulk from around the vent pipe. Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe.

The plumbing vent pipe is a vertical pipe that attaches to the drain line and runs through the roof of a home. There are many possible parts of the roof potentially leaking but one of the most common ones is the area around the roof vent. It helps maintain proper atmospheric pressure in a building s waste system and channels the exhaust gasses to the vent. Vent pipe leaks during heavy rain can occur if you have cracks in your vent pipe boot or flashing.

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. Use the knife blade to scrape the pipe clean and smooth. The pipe leading to the main roof vent is called the vent stack. Here s what to look for.

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. If your furnace exhaust pipe or flue pipe is leaking it can be a sign of a much bigger problem.