Residential Attic Roof Vents

The keepa attic vent is built exclusively for flat roof ventilation roof pitch is 2 12 or less.

Residential attic roof vents.

The keepa attic vent is used for ventilating attics and or plenum as a roof exhaust vent or as an air intake roof vent. 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. One of the most common types of static roof vents is the box vent. Enter square footage calculate or enter the square footage of the attic or area to be vented.

They let moisture and hot air exit the attic but they aren t nearly as effective as other types of roof vents and homes generally need to have several of these units for the best results. It alleviates moisture in the winter and heat in the summer to extend roof membrane life. That said air resistance and interference such as vent grates reduces the area of true 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.

These vents are static vents that are placed over holes in the roof close to the roof ridge. For this method to be most effective approximately equal amounts of ventilation should be placed at the soffits or eave level and at or near the top of the attic space. See the benefits of attic ventilation a new roof is more than just shingles. It comes on an easy to install flexible mesh roll and is hand nailable with no complicated fitting wrapping nail gun adapters connectors or end plugs needed.

In addition insulation baffles must be installed at the point where the attic floor meets the roofline to prevent the attic insulation from migrating into the cavities and restricting the airflow from the soffit vents. Unlike box vents which are square off ridge vents are usually much longer and thinner. 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 best type of roof vents for your home are the ones that work best with your home s airflow and.

Ridge box turtle types of roof vents. Outside air enters the attic space through soffit or eave vents rises through the attic space as it warms and exits through vents that are positioned at or near the top. Effective attic ventilation systems reduce damaging heat and moisture in your attic promote energy efficiency by helping to reduce the load on your air conditioner in the summer and also reduce the risk of ice dam formation on your roof. In other words the entire vent opening doesn t count as vented space.

When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra exhaust vent is a shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic. It is compatible with 3 or 4 ductwork and includes a 3 to 4 adapter for convenience. The soffit vents allow convective air movement from the soffits of the residence to the ridge vent.