Too Much Soffit Attic Ventilation

For most of us the attic is a place to store clothes luggage and old family photos but for energy researchers it s a hot topic of discussion.

Too much soffit attic ventilation.

Length x width of attic in feet 150 total sq. Enter square footage calculate or enter the square footage of the attic or area to be vented. The two main dangers associated with too much ventilation involve roof damage and increased utility bills. Anything less than balanced is not optimal.

Soffit vents help increase the airflow are easy to install and only cost about 3 per 8 ft. Dangers of too much ventilation. Homeowners can too easily inadvertently block them when insulating the attic. And when you put too many products on your roof that s improper ventilation.

To find out how many soffit vents you need to install. What happens is people put too many products on their roof. 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. As a certified licensed home inspector it is not correct to say too much ventilation is bad for an attic unless rain moisture is getting in.

Most building codes require a ratio of 1 150 ventilation space to attic floor space. Can you have too much ventilation in your attic. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. A wind turbine catches the wind and spins a fan which pulls hot air outside.

All it takes to grow mold in your attic is stagnant humid air. There can be more soffit ventilation but never less soffit ventilation than ridge ventilation for new and remodeled construction i recommend installing a ridge vent and that all the soffits. Calculate the total vent area needed multiply the length of the attic times the width in feet to find the attic area then divide by 150 to find the total square feet of vent space needed. Venting a homes attic is a very important best building practices will say 50 at the ridge and 50 at the soffits unobstructed.

Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. While effective at pulling in cooler air the biggest problem posed by this type of soffit vents is their positioning. If a roofing contractor is going to be out of balance with the attic ventilation system it s better to have too much intake than too much exhaust because the excess intake converts to exhaust on the leeward side of the house.