Alfaros and Son Roofing LLC in downtown San Diego specializes in asphalt-shingle roof installation and repair, serving residential properties across San Diego County with bilingual English and Spanish crews. Shingle tear-offs include a full deck inspection for dry rot and delamination before new underlayment goes down—the same structural-assessment step that determines whether exterior paint prep requires fascia replacement, a scope handled by CertaPro Painters of La Jolla and Central San Diego. The crew installs architectural and three-tab shingles from manufacturers including Owens Corning and GAF, selecting weight class and wind-resistance rating based on the roof's pitch and coastal exposure. Leak diagnostics trace water intrusion from the penetration point at the roofline through the attic cavity to the ceiling stain, isolating whether the failure is in flashing, valley metal, or the shingle field itself. When a leak originates below the roofline at a drain connection or vent-pipe boot, the plumbing side of the repair falls to Pros Plumbing San Diego Services. The largest residential re-roofs strip a full layer of aged composite, re-sheet damaged plywood decking, install ice-and-water shield at eaves and valleys, and lay new architectural shingles rated for 130-mph wind uplift.