What is a potential consequence of missing drip edge flashings on a roof?

Missing drip edge flashings can lead to water intrusion along the roof's edge, which may result in rot in the fascia. The drip edge is crucial because it directs water away from the roof and into the gutters, preventing it from saturating the fascia board. When water is allowed to accumulate or run down the fascia without proper drainage, it can compromise the wood’s integrity, leading to rot, decay, and eventually the need for costly repairs or replacements.

In this scenario, while water accumulation in the attic may also occur due to inadequate drainage, the immediate and direct consequence of missing the drip edge is the exposure of the fascia to moisture. Increased heat retention and decreased insulation efficiency are not directly related to the absence of drip edge flashing; rather, they pertain to different issues concerning roof insulation and ventilation. Thus, the presence of drip edge flashings is essential for maintaining the integrity of the roof and preventing damage to structural components like the fascia.