What roofing problem is expressed through the term "alligatoring"?

The term "alligatoring" refers specifically to the cracking of the surface layer on a roofing system, often observed in built-up roofs or modified bitumen roofs. This phenomenon typically manifests as a pattern of cracks resembling the skin of an alligator, which can indicate significant wear and degradation of the roofing material.

Over time, exposure to various environmental factors, including UV radiation, temperature fluctuations, and moisture, can exacerbate the condition and lead to these cracks. Alligatoring is a sign that the roofing material has become brittle due to age and weathering, making it less effective in protecting the underlying structure from leaks. Addressing alligatoring is essential for maintaining the integrity of a roofing system and preventing further damage that could lead to expensive repairs or replacements.