Attic Ventilation Air Flow

For the best results place roof ventilation near the roof s peak and soffit vents in the eaves.

Attic ventilation air flow.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Warm air that escapes living space also carries moisture that will condense on rafters or roof sheathing. Intake vents located at the lowest part of the roof under the eaves allow cool. I have a shop in my attic for some of my hobbies and it get s very hot in the summer.

Increased ventilation will make the entire roof cold and reduce or eliminate ice dams. If you see dampness or frost you need better roof ventilation and some attic vents. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof.

I have large attic with ridge vents and screened vents at either end of the attic to maintain air flow. They are typically easier to install and won t detract from the appearance of your roof. Allows cool dry air to enter the attic. The following product options will allow you to achieve an intake nfva of 528 square inches.

The insulation will resist heat transfer into the house. Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent. A ridge vent is a ventilation strip that is placed along the ridgeline of the home. These ice dams form when warm attic air melts the snow on the roof and the water refreezes along the colder edge of the roof.

In the summer natural air flow in a well vented attic moves super heated air out of the attic protecting roof shingles and removing moisture. The ice traps water behind it allowing the water to seep back under the shingles and leak through the roof. They can quickly remove a larger volume of hot and or humid air from your attic compared to static ventilation which helps save money on your heating and cooling. Can i put a small swamp cooler or ventless a c unit up there to cool it only to use while i am in my shop maybe an hour or two a couple times a week.

Proper insulation and air sealing also keeps attics cold in winter by blocking the entry of heat and moist air from below. It is important that air movement occurs and is not impeded by any framing members of the. Master flow egv5 gable mount attic ventilators are master flow egv5 gable mount attic ventilators are a great choice for exhaust ventilation. Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator.