Snow Blowing Into Attic Through Roof Vents

Hi i m looking for suggestions to the possible cause of snow entering the attic through at least five of the seven roof vents on the home pictured in attachments.

Snow blowing into attic through roof vents.

That explained what had caused the water stains. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. Roofers often complain that roof vents battered by storms can fail allowing blowing snow and rain to penetrate the attic. Homeowner had enough snow through one of the vents to cause considerable water damage to the storey below last spring.

Hot air exhaust vents located at the peak of the roof allow hot air to escape. On an inspection yesterday i noticed a water stain in the corner of the garage ceiling. Engineered opening of 4 5 seems a little excessive to me the vents we use on a truss roof only require 7 8 each side 1 3 4 total. Air blows into your attic through perforated soffit vents at the eves and helps push the air in the attic up through the ridge vent.

I ve never had a problem with any of several hundred installations we ve done. No matter how much wind and snow they should never allow snow into the attic. Failing vents cause rot mould insulation damage call backs thousands of dollars of repairs and disappointed customers. After pretty much every storm like this i tend to find piles of snow in clients attics right around the gable end vents on the windward side of the attic naturally.

Another fine snow strong wind event here in eastern canada today. Securing vents loose vent covers can allow rain to blow into the attic. This should lower the temperature of your attic and lower your energy bills in the summer months. Minimizing water intrusion through roof vents in high wind regions 2 of 8 r 7 oofing 12 10 mitigation guidance soffit vents key issues n it is important to keep the soffit ma terial in place.

While some water can be blown into the attic through almost any type of soffit vent the amount of water intrusion increas es dramatically when the. When i looked in the attic above the stain i saw snow that had blown into the garage attic through the soffit vent. These vents give your roof a nice clean look and provide more open area for the hot air in the attic to escape. There were no obvious roof problems although i did not walk the roof with snow on the roof.