How Much Roof Ventilation

Dangers of too much ventilation.

How much roof ventilation.

A wind turbine catches the wind and spins a fan which pulls hot air outside. 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. 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. The two main dangers associated with too much ventilation involve roof damage and increased utility bills.

The amount of space you devote to intake must be equal to the amount you allow for exhaust and these must be calculated according to the size of your attic and slope of your roof. However we rarely think like that for roofs even though they undoubtedly require ventilation. The following product options will allow you to achieve an intake nfva of 528 square inches. Most building codes require a ratio of 1 150 ventilation space to attic floor space.

It makes sense as all of us know that the most humid rooms in the house like the bathroom and kitchen need it. With a power switch or a thermostat installation an attic fan can be turned on to let hot air from the attic out. How much ventilation does a flat roof need. Many people falsely assume that their roof doesn t require ventilation.

The key to proper ventilation of your roof and attic is balance. Ventilation can be accomplished using various products and techniques. Allows cool dry air to enter the attic.