Too Much Attic 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.

Too much attic ventilation.

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. The two main dangers associated with too much ventilation involve roof damage and increased utility bills. If there s blown in insulation like ours rake back the fluffy stuff with a 3 or 4 ft long 1 x 6 or use a garden rake or hoe. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

If the attic is insulated with fiberglass batts just pull back any that are blocking the flow of air. Also should the vents to the crawl space be open in summer and closed in winter. What happens is people put too many products on their roof. Enter square footage calculate or enter the square footage of the attic or area to be vented.

All it takes to grow mold in your attic is stagnant humid air. 2 focusing only on heat buildup. Dangers of too much ventilation. 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.

And when you put too many products on your roof that s improper ventilation. Is this too much ventilation. Venting a homes attic is a very important best building practices will say 50 at the ridge and 50 at the soffits unobstructed. Most building codes require a ratio of 1 150 ventilation space to attic floor space.

Do not use mechanical means electric attic fans. Homeowners can too easily inadvertently block them when insulating the attic. You can also contact your local municipality to check on building code in your area. With a power switch or a thermostat installation an attic fan can be turned on to let hot air from the attic out.

Roof ventilation keeps the air moving and stops mold from growing but too much ventilation can be just as bad as having none.