Just because your house does not include built-in roof ventilation does not mean that it is not important. Initially it may seem like an additional and unnecessary stress, but once installed it can make a huge difference in the lifespan of your attic and roof structure. Eventually, these installations will save you hundreds of dollars in repair costs.
The ventilation process is beneficial in the extreme weather months throughout the year. During the summer the ventilation helps keep the temperature down in the attic, preventing moisture from collecting and deteriorating shingles. These lower temperatures then affect the rest of the home as well, keeping energy and air conditioning costs down.
Once it begins to get cold outside, the ventilation is still able to maintain a dry environment for the attic and reduce the moisture inside. Typically, water would build up under the shingles, the insulation would become damaged, and the roof structure would rot.
In addition, without roof ventilation your home may begin to produce ice dams on your roof. In areas of extreme cold, roofs need special protection from the ice and snowfall in order to prevent it from building up and blocking the natural flow of melted water off of the roof. If not installed these ice dams often start leaks inside homes which then results in drywall damage.
Save yourself more money and more headaches by installing roof ventilation today. You will be grateful in both the usually hot summer months and freezing winter months.