3. Improper Ventilation
Basically said, roofs need to breathe. It doesn’t matter if you live where it is cold or warm year-round. Ventilation plays a key factor in the lifespan of your roof. This factor is often overlooked by many roofing contractors.
In the winter, one of the most important things to factor in is the ventilation. Ice dams can form fast and damage can seem to happen even faster. When the roof has ice dams, it becomes brittle, cracks and then can leak as the ice defrosts.
In the summer it is just the opposite. Humidity builds up in the attic and then the chances of mold developing are highly increased. This is not only bad for the structure of the roof but can also cause health problems.