Residential Roofing Experts and We Specialize In Commercial & Industrial Roofs. Proudly Serving Upland, Rancho Cucamonga, Ontario, Fontana, Rialto, Colton, San Bernardino, Montclair, Claremont, La Verne, Chino, Chino Hills, San Dimas, Glendora, Covina, West Covina, Azusa, Diamond Bar and surrounding areas! Competition Roofing in Upland, California, specializes in roofing repair and installation services for residential and commercial properties. We are your #1 tile roof repair experts, come check out our new bone yard. From damaged and missing tile to water leaks, termite, and wind damage, we'll do it all, even comp and wood shake roofing. There are also 10 year warranties available.