Attic Ventilation Air Flow

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.

Attic ventilation air flow.

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. For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Increased ventilation will make the entire roof cold and reduce or eliminate ice dams.

Master flow egv5 gable mount attic ventilators are master flow egv5 gable mount attic ventilators are a great choice for exhaust ventilation. I have a shop in my attic for some of my hobbies and it get s very hot in the summer. It is important that air movement occurs and is not impeded by any framing members of the. Warm air that escapes living space also carries moisture that will condense on rafters or roof sheathing.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. The following product options will allow you to achieve an intake nfva of 528 square inches. See the benefits of attic ventilation a new roof is more than just shingles. Proper insulation and air sealing also keeps attics cold in winter by blocking the entry of heat and moist air from below.

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. Allows cool dry air to enter the attic. The insulation will resist heat transfer into the house. 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.

Intake vents located at the lowest part of the roof under the eaves allow cool. I have large attic with ridge vents and screened vents at either end of the attic to maintain air flow. 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. 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.

Grab a flashlight and inspect your attic during the winter. 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. If you see dampness or frost you need better roof ventilation and some attic vents. 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.