One of the main purposes of the roof and attic ventilation is allowing the heat and humidity to escape. The ventilation unit prevents the possible damage of rain, snow, or moisture. It should be designed to keep insects, reptiles, and other possible invaders out of the roof. A ventilated attic will help in the prevention of rotting, dry wall damage, mildew, peeling of paint etc.; it will also prevent the moisture from being trapped and damaging the materials inside the roof.
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