Cal-Pac Roofing is the Silicon Valley and Northern Californias most experienced provider of stone-coated steel roofing systems. Located in Campbell, CA, weve been roofing homes with metal roofing systems for over 30 years. We provide complete roofing services for San Jose and the Silicon Valley. Cal-Pac Roofing proudly offers SteelRock, Decra and Gerard roofing systems, providing the beauty of tile or shake, and the safety of steel. A metal roofing system increases your homes value, safety and curb appeal. And nobodys been doing metal roofing in the Silicon Valley better than Cal-Pac Roofing.