installation of roof vent for new bathroom fan

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Old 10-08-20, 07:14 PM
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installation of roof vent for new bathroom fan

Scenario: old 2-story house has a bathroom on the 2nd floor but it has never had a ceiling fan installed in it. The roof shingles are going to be replaced later this month. I've been thinking replacement of the roof shingles is an ideal time to install a roof vent for a bathroom fan. Is this true?

And, even if a bathroom fan is not installed until some time after the roofing is replaced, this still seems to be a very good time to install a roof vent for a bathroom fan. Is this true?
 
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Old 10-08-20, 08:13 PM
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Yes, that would be an ideal time to drill the 4 1/4" hole and put it in. If the ductwork isn't being connected to it right away, it might be a good idea to at least put a short 4" duct takeoff onto the vent hood as it is being set... before they fasten it to the roof. That way, it will be easy for someone inside the attic to hook it up later.
 
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Old 10-09-20, 05:57 AM
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When locating the vent in the roof pay careful attention to where it is located in relation to the fan below. If it is close to the eave of the roof will there be enough room inside the attic for someone to get to that area and connect the duct? Sometimes it's better to locate it higher up on the roof where there is more room to access. Or, the vent can be located very close to the fan and the ducting connected by reaching through the fan's hole in the bathroom ceiling. Don't forget that most fans exhaust on the side so there has to be room for a bend up towards the roof.
 
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Old 10-09-20, 11:10 AM
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Great tips! Thanks fellas!
 
 

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