Attic Insulation Around Bathroom Exhaust Fan

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Attic insulation around bathroom exhaust fan.

In existing homes air seal and insulate around new or existing bathroom and kitchen exhaust fans to minimize air leakage to and from unconditioned attics. The first step is to head to the attic. I recently installed a bathroom exhaust fan. What is the best thing to do to correct this problem.

Bathroom vent fan ductwork insulation. In un conditioned space such as an attic where otherwise your fan duct will be exposed to cold attic air in winter use insulated solid metal ducting or insulated flex duct. This is non usable space and it is well ventilated with ridge and soffit ventilation so it does get cold in the winter. If you take it through the roof using a metal pipe do you use insulation around the pipe.

When moist air is carried through a duct that passes through a cold attic space condensation will occur. The job of a bathroom exhaust fan is to remove moist air and foul odors from the bathroom. Remove insulation around the exhaust fan on the attic side. Home bathroom bathroom exhaust fan.

It has started to leak water back through the exhaust fan into the bathroom. I have a bathroom exhaust fan that is vented directly into the attic. The duct runs in my attic above the bathroom ceiling two story home. Water stains on the ceiling around your bath fan may indicate a leak coming from the vent cap on your roof but condensation is the more likely culprit.

If bath fan ducting isn t properly insulated the moist air from your house will condense inside the duct. T he result of the insulation problem around a bathroom exhaust fan is either water stains or mold near the vent of your bathroom. I used flexible 4 aluminum duct to the exhaust damper on the roof.