If your membrane roofing system is aging, your roof coverings may experience severe cracking—which may resemble the skin of a reptile. 

This condition, known in the home inspection industry as “alligatoring,” is a common occurrence. It happens because of sun damage, ice, and temperature variations—and cracks can get worse if left untreated.

I recently came across built-up flat roof coverings that were alligatoring at a house in Bow, and I recommended the homeowner budget for re-seal coating the roofing. This is a three-step process that involves ridding the surfaces of dust and particles, applying a primer and then finally a coating. 

Because this issue is common with membrane roofing systems, homeowners with these systems should inspect their roofs at least twice per year. Apply new coatings as needed, and make sure to repair any blisters that could cause leakage.

If you have questions or comments about roofing repairs or home inspections in general, tweet me (@AIHomeInspect).