What is one of the major risks of having a poorly vented attic?

A poorly vented attic can lead to overheating and damage to roofing materials due to the buildup of excess heat. Inadequate ventilation in the attic allows hot air to accumulate, particularly in regions with hot climates or during hot seasons. This trapped heat can significantly raise the temperature of the roofing materials, leading to various problems such as warping, curling, or even degradation of the shingles and underlayment. Over time, this excessive heat can result in a shortened lifespan of the roofing materials.

Additionally, the heat buildup can affect the overall energy efficiency of the home by causing air conditioning systems to work harder, thereby increasing energy costs. Effective attic ventilation helps maintain a consistent temperature within the attic space, which is crucial for protecting both the structure and the comfort of the home’s interior.

While other options may present potential issues, the immediate and direct consequence of poor attic ventilation is the overheating and resultant damage to roofing materials, making this the major risk to consider.