Step-by-Step Instructions and Pictures of How to Run Duct Outside to Prevent Roof Rot

Improve bathroom air flow with a vent through the roof. Read an overview on how to repair a broken bathroom fan.
From The Family Handyman
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How to Run Duct Outside to Prevent Roof Rot-Step 2
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2. Notch out the upper layer of shingles to fit around the vent’s hood. Remove any nails that will stop the vent’s flange from slipping under the shingles.
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