“Ventilate” comes from the Latin word for “to fan.” Simply put, it’s the action of moving air. Out with the hot. In with the cool. And that’s exactly how ventilation works. It provides conditions that allow air to flow. Every time stale, the overheated air in your home or attic is vented out and fresh air is pulled in to replace it, you have what is known as an “air exchange.”
As the variety of roofing materials in the industry increases, more and more people are asking us about the merits of asphalt shingles versus other materials. If the value is your primary interest, the comparison can be quickly narrowed to just two options: metal and asphalt.
Ice dams are most common in northern climates that are subject to heavy snow buildups on roofs. Ice dams occur when this heavy snow buildup melts during the day and then refreezes when temperatures fall overnight. After several days of the thaw-freeze cycle, it’s common for the ice to work up under the shingles until it reached an area of the roof warmed by your home.