There are two main types of air ventilation: Attic and Soffit. Air flows through the Soffit Vents and travels up through the attic so air circulates and doesn't stagnate. Most roofs fail because of improper ventilation. A working attic ventilation system allows a continuous flow of outside air through the attic protecting the efficiency of the insulation and helping to lower temperatures in the living space. It consists of a balance between air intake (at your eaves or soffits) and air exhaust (at or near your roof's ridge).
Intake ventilation MUST be at least equal to exhaust ventilation. REMEMBER: always have balanced ventilation systems. In no case should the amount of exhaust ventilation exceed the amount of intake ventilation. Correctly installed top vents expel the air effectively eliminating heat build up and moisture.
Common practice in the roofing industry is to install Turtle Vents. To install these vents, roofing installers need to cut in to the roof decking which potentially promotes opportunities for leaks. Additionally, can vents are notorious for inadequate air flow causing excessive heat build-up.
Industry experts estimate that 50-70% of roofs installed today are not vented properly, thus reducing roof life by 5-10 years. When shingles become overheated they curl and flex, so at to move away from the heat. Also, poor venting causes excessive attic condensation causing "rain" inside the attic. Mold, eroded dry wall and dry rot damage are typical outcomes of this problem.
Integrity Home Pros Standards
Integrity Home Pros installs GAF Cobra Products or Air Vents Shingle Vent II Ridge Vents that provide effective top-venting for the length of the entire roof ridge. When installing this type of vent, we leave 3" gap along the ridge then place the system on top for the air to escape properly. We use special cut Hip N' Ridge Shingle caps to cover the ridge vents to ensure proper coverage and longevity. Can vents can leak; a properly installed ridge vent will give the proper ventilation and will not leak.
These systems meet or exceed requirements of all recognized national building codes for ventilation. The Ridge Vent System has passed all R&D tests for superior weather infiltration protection and prevents cracked shingles, curling shingles, and deck warping. The Ridge Vent System also eliminates the ugly appearance of can vents.
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