Snow Blowing Into Attic Through Roof Vents

On an inspection yesterday i noticed a water stain in the corner of the garage ceiling.

Snow blowing into attic through roof vents.

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. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. 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.

Homeowner had enough snow through one of the vents to cause considerable water damage to the storey below last spring. 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. Yesterday we had snow and high winds. There were no obvious roof problems although i did not walk the roof with snow on the roof.

I ve never had a problem with any of several hundred installations we ve done. Roofers often complain that roof vents battered by storms can fail allowing blowing snow and rain to penetrate the attic. These vents give your roof a nice clean look and provide more open area for the hot air in the attic to escape. Keeping rain from blowing in attic vents requires a few hours of your time but may save you the cost of expensive repair bills.

In one particular case it seemed to be a pretty big factor in the amount of moisture in the attic as there was serious frost covering most of the roof deck. 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. Failing vents cause rot mould insulation damage call backs thousands of dollars of repairs and disappointed customers. Securing vents loose vent covers can allow rain to blow into the attic.

That explained what had caused the water stains. Hot air exhaust vents located at the peak of the roof allow hot air to escape. 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. Another fine snow strong wind event here in eastern canada today.