Attic Ceiling Vent

Condensation on your ceiling can cause water damage and promote the growth of mold or mildew.

Attic ceiling vent.

Or it may have gable vents which are louvered openings at the top of gables. The result is a cooler attic space with plenty of air exchange. Touch your ceiling on a warm sunny day. This cap features both a back draft damper and bird screen preventing outside air from entering the home and birds and small pests from entering duct work.

The increase in the use of complex roof shapes and cathedral ceilings has resulted in problems with vented roofs. Your roof may have a ridge vent which is a low profile continuous roof air vent running along the peak of the roof. Improper ventilation and insulation of home attic space can produce high humidity levels and trap. Attic fans perform this ventilation by pushing hot air out into the environment while also pulling fresh cool air into the attic.

That said air resistance and interference such as vent grates reduces the area of true ventilation. However they work best with airtight ceiling attic interfaces and where ductwork and air handlers are not located within attic spaces. Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation.