The layered construction of an asphalt shingle roof is fundamental to its performance and longevity. Each layer—from the decking to the underlayment, shingles, and flashing—plays a specific role in protecting the home from the elements. For homeowners considering a new roofing project or needing repairs, understanding these layers can aid in making better choices regarding materials and installation techniques. Ultimately, a well-constructed asphalt shingle roof, with attention to each layer, can provide reliable protection and enhance the home’s overall efficiency and aesthetic appeal.