Roof Vent Blocked By Snow

On occasion intakes at eaves may have to be baffled to block infiltrating snow.

Roof vent blocked by snow.

The plumbing vent pipes in your house perform two functions since the vent pipes go through the. This causes free flowing water to run between shingles and down to the gutters. An under sized plumbing vent less than 2 diameter or too short above the roof line can become blocked by frost in the vent line above the roof blocked by snow cover or have its gases blown down to a lower level by cold or varying air movement. Snow ingestion can become a problem at roof ventilation openings.

When the attic becomes too warm due to closed vents snow and ice on the roof readily melts. Wind baffles are effective at directing wind blown snow up and over ridge vents 11. Wouldn t installing a vent that will continue letting air in even though it blocks the snow short circuit the stack effect and render the soffit vent useless. Hitting uneven roof temperatures caused by blocked vents leads to the refreezing that is troubling.