Venting Furnace Through Metal Roof

The metal i m using is called crinkle black i purchased all my materials at h.

Venting furnace through metal roof.

Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. Should my furnace flue pipe go through the roof or the side of the house. That depends on whether you have a standard efficiency or a high efficiency furnace. Should you vent a metal roof.

In many cases for existing homes this is the easier way to go. If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. Metal roofing works well with this because the metal is unaffected by heat not being able to pass through it and enter the attic. Installing some type of ventilation mechanism on a metal roof is not a lot different from the addition of vents to any type of roof.

If there is no sub roof to support the metal roof consider installing slatted vents just under the eaves instead of on the roof. In this video i cover installing a roof boot for a vent pipe in a metal roof. The other option of course is a vented attic which requires an equal balance of intake and exhaust vents. So which type of venting system should your furnace have.

The water will condense and drip into the insulation below and perhaps into the house. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood.