Roof Vents are Crucial for Attic Ventilation
Roof vents play an important role in the ventilation of a home or building, but during the winter months, many homeowners may wonder if these vents can still function properly under a layer of snow. The short answer is yes, roof vents can still breathe under snow.
Hot Air from Inside your Home Will Find a Way Out of Your Attic
Roof vents work by allowing hot air to escape from the attic, which helps to regulate the temperature and prevent moisture buildup. When snow accumulates on the roof, it may seem like the vents are blocked and unable to function, but in most cases, the snow will not impede the flow of air through the vents. The heat generated inside the attic will melt the snow on the roof and allow the hot air to escape through the vents.
Snow that has Settled on Your Roof is 90 - 95% Air
The 90-95% air number in snow is a commonly cited estimate in literature about snow science, and it is based on various studies and experiments conducted on snow samples. Because the snow on your roof is mostly air, even when your vent is completely covered, air will be able to escape.
Extremely Heavy or Prolonged Snowfall
However, in certain situations where there is a heavy snowfall or where the snowfall is prolonged, the vents may temporarily become blocked by the accumulation of snow. In time the hot air from your attic will melt a path and allow for proper ventilation once again.
Possible Alternative: Tower Vents
Another option to consider is tower vents, which are designed to exhaust air above the snow line. These vents are typically taller than traditional roof vents and are placed higher up on the roof. This allows them to function even when the rest of the roof is covered in snow. Tower vents can be an effective solution for homes in areas with heavy snowfall, but they can be more expensive and come with other problems.
Roof Vents Will Breathe Under Snow
Blocked attic vents due to snow should not be a major concern as hot air will naturally escape. The bigger issue lies in blowing snow infiltrating the attic, causing roof water damage and compromising insulation. Taking proactive measures to prevent snow from entering roof vents is crucial to protect the health and longevity of your roofing system. The SNOWVENTCO exhaust vent is specifically designed to prevent particle infiltration with its stainless steel filter, allowing airflow while blocking snow penetration.