How To Fix A Leaky Gas Flue Roof Vent

If your roof vent leaks during heavy rain the rain may be blowing up under the hood and into the vent.

How to fix a leaky gas flue roof vent.

In a gas heated home a flue pipe vents the gases out through the roof. The immediate thing to do is to contain dripping water from the leak. Some roof leaks are tough to locate. Rain water was leaking through the roof into the attic and into the furnace closet.

If the draft hood is damaged replace it with a new one of the same size. Example of chimney cricket repair. It this is the case you need to create a breathable shield to slow the driving rain drops while still allowing air flow. Use a pocketknife to scrape rough edges and sharp points from upper end of plastic vent pipe.

Across the joists lay a piece of plywood and put a bucket to contain the water and. Sometimes the water shows up at a ceiling spot distant from the leak. Cut away the old caulk from around the vent pipe. This is how to stop a roof leak in the rain.

Video shows recommended and verified repair. Use the knife blade to scrape the pipe clean and smooth. A number of points may fail in the flue but they are mostly easy to detect and fix. Make sure to center the draft hood over the vent hole properly straighten it and tighten it up or replace the screws if needed.

If your ceiling has a plastic vapor barrier between the drywall and the attic insulation push the insulation aside and look for flow stains on the plastic often water runs to openings in the vapor barrier such as at ceiling light fixtures. Apply a thick bead of lap seal caulk around the seam between the vent pipe and old rubber gasket. A flue pipe with dripping water could have to do with rainwater entering so replace the flue cap on the roof. This video shows one possible way to do that.

Like all installations that poke through the roof sometimes a flue pipe develops leaks that result in water leakage into the attic or roof space when it rains. Furnace metal gas vent leak.