If your roof develops ice dams, or there are signs of mold or moisture in your attic, you’ll want to begin with an inspection of your roof ventilation system. 12 FH97NOV_01206003 ...

Ever heard of a box roof vent? You've probably seen one even if you didn't know its name. Here's what it is, how it works. and when you need one.

Much more than a stack of shingles, a roofing system features underlayment, flashing, ventilation and a gutter system. Each interconnected component contributes to the roof’s and home’s health.

But a roof today is truly a system that includes ventilation, mechanical flashings, underlayment, eaves flashing, and other components designed and installed by trained professionals.

Special gas vent lines are manufactured with a male-to-female connection with a gasket which provides a pressure seal. It is important to maintain a slope of ¼ inch per foot for horizontal sections to ...