Snow In Attic From Roof Vents

Side by side comparison during storm with a standard roof vent shows shocking fail.

Snow in attic from roof vents.

Cobra snowcountry exhaust vent for roof ridge allows heat and moisture to escape and helps resist snow infiltration in harsh winter weather. Attic ventilation is driven primarily by wind. Melted snow in this case is caused by heat loss from the conditioned space. Inches per linear foot 67 720 m 2 lm of net free ventilating area.

A few of the attics had vents installed improperly causing some of the exhaust vents to act as intake vents sucking in the snow. The requirement for attic vent sizing is nominally 1 300 or one square foot of vent size for every 300 square feet of attic floor area. In cold climates the primary purpose of attic or roof ventilatin is to maintain a cold roof tempeature to control ice dams created by melting snow and to vent moisture that moves from the conditioned space to the attic. It provides 18 sq.

We roofers never used to have a choice but now we do. Homeowners can choose from a variety of. Preventing attic snow when conditions permit i e. Snow is off the roof and it is safe to go up there check every inch of the vent to make sure it is tightly secured to the roof.

The unique easytear sizing feature allows you to hand tear product in 3 76 mm increments no knives necessary and less waste. Roofers often complain that roof vents battered by storms can fail allowing blowing snow and rain to penetrate the attic. Snowventco roof vent is tested 99 9 snow proof during storm. The snow then melted from the heat of the home soaked through the insulation and then into the ceiling drywall.

Failing vents cause rot mould insulation damage call backs thousands of dollars of repairs and disappointed customers. To ensure thorough venting have openings at the soffits and then higher on the roof at the ridge gable end or high on the roof surface.