Philadelphia winters are hard on asphalt shingles. Water seeps under shingle edges, freezes, expands, and lifts the shingles away from the roof deck. When temperatures rise, the ice melts and refreezes in a cycle that repeats dozens of times each winter. This freeze-thaw action cracks shingles, breaks sealant bonds, and creates entry points for water. Metal roofs do not absorb water, so freeze-thaw cycles do not damage the panels. Snow and ice slide off metal roofs faster than asphalt, which reduces ice dam formation and lowers the risk of water intrusion into your attic.
Philadelphia's mix of rowhomes, Tudor revivals, and Victorian-era homes creates unique roofing challenges. Older homes have steeper roof pitches and more complex flashing details around chimneys, dormers, and bay windows. These details increase installation costs for both asphalt and metal systems, but they increase metal costs more because custom flashing must be fabricated on-site. Atlas Roofing Philadelphia understands the local architecture and has experience working with historic properties where maintaining period-appropriate aesthetics matters. We help you choose roofing materials that meet both performance and design requirements.