Snow Blowing Into Attic Through Roof Vents

During a rain storm winds may blow rain into your home through the attic vents.

Snow blowing into attic through roof vents. I can tell you that when the snow is dry and light and the wind is high it will blow in through most if not all roof vents that i know of. Roofers often complain that roof vents battered by storms can fail allowing blowing snow and rain to penetrate the attic. Later it would get warm melt and end up as a leak. It looks like the amount of exhaust is up to code for 1500 sf attic space.

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. This added moisture causes wood damage fuels the growth of mold and mildew and may destroy stored items. Attic snow can accumulate when the wind conditions are just right and you have ridge vents. Some time after the house was first built it is about 35 years old the previous owner had some problems with leaks in the house due to snow infiltration through vents in the soffits.

Ventilation is code btw so lose that roofer if you re really a gc. This snow usually evaporates my overkill was to put large aluminum tinfoil oven pans under each of my roof vents to catch and hold the snow that will form a small hill under each vents with the right conditions. Snow coming through roof vents. 1500 300 5 times 144 720 2 360sq inches of exhaust and at least the same amount of intake.

If you see new water spots on your ceiling after a windy snowfall you might have this problem. 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. Homeowners can choose from a variety of. Obviously snow is no good in the attic as it will eventually melt causing damage and possibly mold over time.