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lobo 09-30-2012 07:15 PM

roof ventilation
I am installing an asphalt roof on a home that was built in the 5o's with no soffits. Home has only gable vents. I would like to add box vents while replacing roof. Does anyone know if they are compatible?

Windows on Wash 10-01-2012 09:07 AM

Box vents and gable end vents can work if they are not spaced to close to the end walls.

Do you have an overhang?

AirVent has great informational resources on venting.

NHtransplant 10-01-2012 09:55 AM

Just another idea while you're playing with the venting... You could install a gable vent fan on one of the gables. I did that in a previous house and it helped to expel humid air and hot air. You can get a fan that has a thermostat and a humidostat on it. Once you wire it up it will kick on when it gets hot in the summer or humid in the winter.

Windows on Wash 10-01-2012 10:26 AM


Make sure the gable fan is humidstat and thermostat controlled.

Gary in WA 10-01-2012 11:49 PM

Air-seal the attic first or you will exhaust your money spent conditioning the rooms below and replacing spent air with crawlspace/basement air (humid);

Dangers of powered exhaust (with minimal intakes);


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