Based on the provided content, poor attic ventilation is a major threat to a roof’s longevity. It causes natural heat and moisture to become trapped in the attic, which leads to several types of damage:
- Shingle damage: Without proper ventilation (such as ridge vent installation), heat buildup in the attic can directly cause damage to shingles.
- Reduced lifespan: Proper ventilation is described as a “smart investment” that directly supports a longer roof life by preventing heat damage and moisture buildup.
- Structural issues: Poor airflow encourages the growth of mold and wood rot, which can damage the roof decking.
To prevent these issues, it is recommended to use the 1:300 Net Free Vent Area formula to ensure adequate airflow. Solutions like solar attic fans or ridge vents help by expelling hot, moist air before it can cause the shingles and underlying structure to deteriorate prematurely.
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