What may occur if there is excessive shingle overhang on roofs with very steep pitches?

Excessive shingle overhang on steeply pitched roofs can lead to runoff overshooting the gutters. When the angle of the roof is very steep, water flows down rapidly, and if the overhang is too far out, the fast-moving water can miss the gutter entirely. This can result in water cascading off the edge of the roof, potentially causing damage to the fascia, siding, and foundation below due to improper drainage.

In contrast, other potential problems related to excessive overhangs, such as water pooling or snow accumulation causing leaks, are less directly tied to the steep pitch of the roof. While pooling may happen at the edges of the roof, it is typically less of a concern on steep roofs where runoff is generally quick. Wind stripping shingles is a valid concern on steep roofs but is not directly related to overhang length. Thus, the main issue with excessive overhang on steep roofs is the likelihood of runoff overshooting the gutters, creating drainage problems.