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shadowpool
Attic Ventilation - Need another opinion
shadowpool

I am a huge fan of TOH - and have an old house - which has been totally renovated so it's a new This old house."

I have noticed some condensation in attic. I am trying to figure the correct approach.

Since I have a large attic fan, the roofing company suggested that I eliminate the ridge vent on the roof line. Next, install a humidistat in conjunction with fan so it turns on when humidity or heat is a certain level and will run year round instead of just in summer.

I also have soffit vents along the back of the house. The roofer said with the roof ridge vent, when the fan engages, it is just basically drawing in outside air. He believes it makes more sense to eliminate the ridge vent and concentrate on getting the humditity and hot air out of the attic all year long.

Can someone on staff give me their opinion on this before I eliminate the ridge vent. They told my current fan should cover my attic sq. footage.

Thanks...

bill
Re: Attic Ventilation - Need another opinion
bill

Is your attic a cold or hot attic? in other words is the insulation in the floor of the attic or in the rafters of the roof?

ahmedsalim2014
Re: Attic Ventilation - Need another opinion
ahmedsalim2014

Proper attic ventilation systems allow a continual flow of outside air through the attic, protecting the efficiency of the insulation and helping to lower temperatures in the living space.

It consists of a balance between air intakeand air exhaust (at or near your roof ridge).

The U.S. FHA (Federal Housing Administration) recommends a minimum of at least 1 square foot of attic ventilation (both intake and exhaust) for every 300 square feet of attic space. For example, if your attic is 900 square feet, you need a total of 3 square feet of ventilation. This amount should be divided equally between intake and exhaust ventilation to insure proper air flow through the attic. To calculate the amount of ventilation you need for your home.:)

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