How to Fix a Leaking Bathroom Exhaust Fan During Rainy Weather

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Is your bathroom exhaust fan leaking water when it rains outside? Don’t panic. In this guide, we’ll show you how to fix it and prevent further damage.

Why is Your Bathroom Exhaust Fan Leaking During Rainy Weather?

The most common reason for a bathroom exhaust fan leaking during rainy weather is improper installation. If the vent hose is installed with a vertical slope and exhausts on top of the roof, rainwater can leak through the bathroom vent if the cover is defective or damaged.

Additionally, if you try to vent your bathroom fan into the interior of your home, the moisture from the bathroom can lead to mold growth, wood damage, and even attract termites.

How Do You Fix a Leaking Bathroom Vent Cover?

If you notice water dripping from your bathroom exhaust fan during rain, it’s crucial to identify the source of the problem. The first thing to check is the exterior bathroom vent cover for any hairline cracks or damage that could allow water to enter. Be sure to check the asphalt shingles around the vent hood and verify that the roofing shingles are on top of the upper portion of the bathroom vent flange.

In addition, inspect the nails or screws that secure the bath vent cover to the roof sheathing, as water may be getting in through the nail heads and onto your bathroom vent. Verify that the flap is working correctly as well. If the flap is missing or stuck open, heavy rain can quickly enter your vent cover and cause water to drip down into your bathroom.

How Do You Prevent a Leaking Bathroom Exhaust Fan?

Prevention is the best way to avoid future problems with your bathroom exhaust fan. Ensure that the vent hose is installed correctly and is not located on a vertical slope. Make sure that the cover is secure and free of any damage. If you notice any issues with the cover, replace it as soon as possible to prevent water from entering the vent.

Should You Inspect for Water Damage from a Leaking Bathroom Exhaust Fan?

It’s essential to inspect for water damage in your attic, ceiling, or wall, depending on where your bathroom fan is venting. Look for indications of mold or mildew, particularly on the underside of the roof sheathing or the back of drywall. These are areas where mold thrives.

If you suspect that there may be damage, remove the fan, and inspect the ceiling cavity. Look for damaged insulation, drywall, wood framing, and mold growth. This will give you a better idea of the extent of the damage and what repairs are needed.

Should You Replace a Leaking Bathroom Exhaust Fan?

If you’ve tried to fix the bathroom exhaust fan yourself and the issue persists, it may be time to replace it entirely. A new fan will be more energy-efficient and prevent future leaks, making it a worthwhile investment.

A leaking bathroom exhaust fan can cause serious problems, but it’s a fixable issue. If you notice water dripping from your bathroom fan during rainy weather, take action immediately to prevent further damage. Inspect the exterior bathroom vent cover and verify that the flap is working correctly. If you notice any issues, replace the cover as soon as possible. Finally, if you suspect that there may be water damage, inspect the ceiling cavity to identify the extent of the damage.

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