Furnace Vent Roof Leak

If your furnace has an afue rating of 90 or lower it probably exhausts the gases though the flue pipe on your roof.

Furnace vent roof leak.

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. Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe. Here s what to look for. If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent.

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. Roof leaks around vent pipes is relatively common. This old house general contractor tom silva shows how to create a watertight seal around a vent pipe. See below for a shopping list and tools subscribe to.

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. Steps for fixing a leaking rooftop vent pipe. But some roof air vents sit fairly flat to the roof with a mushroom style hood and unprotected sides. Apply a thick bead of lap seal caulk around the seam between the vent pipe and old rubber gasket.

And on occasion a hard driving rain with whipping wind will cause roof vents to leak water. Use the knife blade to scrape the pipe clean and smooth. If your furnace exhaust pipe or flue pipe is leaking it can be a sign of a much bigger problem. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner.

High efficiency furnaces take advantage of the heat in the combustion gases that are wasted in natural ventilation systems. There are many possible parts of the roof potentially leaking but one of the most common ones is the area around the roof vent. When the vent is withdrawing air from the house it expels the gas outside through the vent. Cut away the old caulk from around the vent pipe.