What is a common result of having insufficient attic ventilation?

Having insufficient attic ventilation can lead to a variety of problems, one of the most significant being mold growth. Proper attic ventilation allows for the regulation of temperature and moisture levels in the attic space. When ventilation is inadequate, warm, moist air can become trapped in the attic. This moisture can condense on cooler surfaces, providing an environment conducive to mold spores to flourish.

Mold thrives in damp environments, and the presence of mold not only compromises the structural integrity of building materials but can also pose health risks to occupants. This underscores the importance of ensuring adequate ventilation in attics to prevent moisture buildup, thereby mitigating the likelihood of mold development.

While improved thermal performance, increased lifespan of roofing materials, and lower heating costs may seem beneficial, these outcomes are generally associated with proper attic ventilation. Insufficient ventilation typically leads to the opposite effects: thermal imbalances, potential degradation of roofing materials, and increased energy costs due to lesser energy efficiency. Thus, addressing attic ventilation should be a priority to maintain a healthy and efficient home environment.