Too Much Ventilation In Attic

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

Too much ventilation in attic.

A wind turbine catches the wind and spins a fan which pulls hot air outside. Attic ventilation myths that are off the charts 1. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the 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.

If your attic is well insulated the insulation might be plugging the spaces between rafters just above exterior walls. There are also dissenting voices who say that the benefits of ventilation are overrated. Hot air exhaust vents located at the peak of the roof allow hot air to escape. Always have a balanced ventilation system.

In the last several decades building codes have called for increased attic insulation. Most building codes require a ratio of 1 150 ventilation space to attic floor space. 2 focusing only on heat buildup. They can disrupt the air flow through the attic.

Dangers of too much ventilation. With a power switch or a thermostat installation an attic fan can be turned on to let hot air from the attic out. That means air can t flow from the soffit vents to the roof vents. 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.

Most experts contend that a well ventilated attic keeps the house more comfortable in summer and guards against moist heated air building up in winter. 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. When you have gable vents the airflow coming in through the soffit or overhang vents can be disrupted by cross ventilation from the gable. You can also contact your local municipality to check on building code in your area.

Just like properly sizing your furnace and air conditioning unit you want precisely. Roof vents are for warmer climates. The solution is to add baffles which allow air to flow past the insulation photo 9. Too many people believe the importance of roof ventilation is to increase energy.

The two main dangers associated with too much ventilation involve roof damage and increased utility bills. More attic ventilation is good.