Moreover, during cold winters, you'll blow warm, moist air from the bathroom onto the cold roof vent and plywood, causing ice to form and potentially creating an ice dam. Generally, yes.

A well-maintained roof is your home’s first line of defense against harsh winter weather. Snow and ice can weigh down a roof, leading to potential leaks, structural problems, and costly repairs.

The Department of Commerce is encouraging Minnesotans to keep furnace exhaust vents, air intake hoods and chimneys clear of snow and ice to keep the heat on and prevent carbon monoxide poisoning.

Refrain from kicking the meter or vent pipes to clear ice or snow. Remove icicles from overhead eaves to prevent dripping water from freezing on the meter or vent pipes. Prevent Carbon Monoxide ...