From: Mader’s Roofing & Masonry Ltd. in Lr. Sackville, N.S.
We find these to be of superior quality and durability for the climate that we live in here in Nova Scotia. Our experience with these vents to date is as follows:
1) They withstood Hurricane Juan (140 mile per hour winds) No fault found.
2) They kept any light snow from entering roof. “GOOD DESIGN”
3) They vent well and seem to create a siphon of air on their own.
We are very pleased with the appearance from the design aspect and durability of the product. We will use these vents in the future.
To the best of our knowledge, ventilation performance has been satisfactory with no problems associated with severe winter conditions. In fact during February of this year we experienced the largest single day snowfall in recent memory, just shy of 3 feet in depth.