We provide the solution to a problem that occurs in the snow belt. Snow often blows through conventional roof vents, our Snowblockers Roof Vent Inserts prevent snow from accumulating in attic spaces. My husband, Henry Knape, after being in the roofing construction business for over forty-five years realized that there was a need to design something that would prevent snow from blowing through metal roof vents. After researching, he came up with a material that could be inserted in every metal roof vent, but that would allow for air to circulate. The material does not need to be replaced, it lasts the life of the roof vent. -Sharon Knape, Owner