Attic Ridge Ventilation

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Attic ridge ventilation. Hvi recommends a ratio of 60 to 40 for soffit ventilation to gable or ridge ventilation. Snow melts and the water refreezes on the cold eaves creating ice dams. Lowering the temperature in the attic can help reduce air conditioning energy costs and roof deck temperature optimize the service life of a roof covering and minimize ice damming. Attic ventilation serves two main functions.

However the utility of attic ventilation fans is actually quite a. See the benefits of attic ventilation. Warm air that escapes rooms below gets trapped in the attic. Insulation at least r 38 or more is there for heating and cooling.

Rafter vents come in 4 foot lengths and 14 1 2 and 22 1 2 inch widths for different rafter spacings. Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool. Best ventilation is open soffit venting to a open vented ridge vent. Help remove excess heat and moisture to protect your roof from premature deterioration.

30 lineal feet required. Rafter vents ensure the soffit vents are clear and there is a channel for outside air to move into the attic at the soffits and out through the gable or ridge vent. Warm air that escapes living space also carries moisture that will condense on rafters or roof sheathing. The downside of attic ventilation fans.

To install the rafter vents staple them directly to the roof decking. 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. Ridge vent must me installed per the manufactures instructions. This happens because of the change in air pressure.

Ventilation and attic vents. A ridge vent is a ventilation strip that is placed along the ridgeline of the home. To lower attic temperatures and to remove excess moisture. Prior to installing the ridge vent a 1 inch wide strip of roof decking is cut out along both sides of the ridgeline to allow for air movement through the vent.

It can do both. The inside air moves through the ridge vest underneath the cap shingle to escape from the side and into the general atmosphere. 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. A new roof is more than just shingles.

Thick ridges of ice on your eaves in winter are a sign of poor attic ventilation. Intake vents located at the lowest part of the roof under the eaves allow cool. The wind which blows over your roof will help to draw the hot moist air out of your attic when roof ridge vents are installed correctly.