Metal roofing is one of the most durable and energy-efficient options for San Francisco homes and commercial buildings. We install both standing seam panels and metal shingles that mimic slate or wood shakes, giving you the look you want with the longevity you need. Our metal roofs typically weigh 1.5 to 2.5 pounds per square foot—far less than tile or slate, which reduces structural load. We use 26-gauge steel or .032 aluminum, both coated with Kynar 500 for fade and corrosion resistance. In San Francisco's marine layer, aluminum resists salt corrosion better than steel, so we recommend it for homes within 3 miles of the coast. For properties farther inland, galvanized steel with a G90 zinc coating performs excellently and costs about 15% less than aluminum. Every metal roof we install includes a hidden fastener system—no exposed screws or rubber washers that dry out and leak. We also integrate standing seam panels with interlocking clips that allow for thermal expansion and contraction, preventing oil-canning and buckling. Your metal roof will reflect up to 70% of solar radiation, lowering your attic temperature by up to 25°F and cutting cooling costs by 10–25% during summer months. Many of our clients see a full return on their metal roof investment within 15 years through energy savings alone. We install over solid plywood or OSB decking with a high-temp synthetic underlayment rated for 220°F continuous exposure. For sloped roofs, we use 1x4 strapping to create an air gap that further reduces heat transfer. All penetrations—vents, skylights, chimneys—get custom-fabricated flashings formed on-site to match your roof's exact pitch. We also install snow guards and ice belts in higher elevation areas like Twin Peaks. Our metal roofs come with manufacturer warranties of 30 years to lifetime, and we back every installation with our own 30-year workmanship warranty. The total cost for a typical San Francisco home ranges from $15,000 to $35,000 depending on square footage, roof complexity, and material choice. Standing seam runs $12–$18 per square foot installed; metal shingles cost $14–$22 per square foot. We provide a detailed line-item estimate so you know exactly what you're paying for. From initial inspection to final cleanup, a typical residential metal roof installation takes 5–10 working days. We handle all permit applications and schedule inspections with San Francisco's Department of Building Inspection. We also offer financing through Hearth for qualified homeowners.