Licensed, insured roofers in our network serving Ontario Ranch, the historic downtown and Creekside and every Ontario neighborhood — tile & shingle roofs, leak repair, and full replacement. Free roof estimate, written and itemized, no obligation.
Ontario is two cities on a roof map: the older grid north of the 60 running post-war shingle that has been covered twice, and Ontario Ranch's 2000s–2020s tile tracts to the south still on original underlayment. Same city, opposite ends of the roof life cycle.
Heat is the main enemy of a Ontario roof. Late-summer attic temperatures above 140°F age the shingle above and the underlayment below at the same time, which is why ventilation belongs in every honest replacement quote here. Ontario is a mixed roof market — concrete tile on some streets, composition shingle on others, converted wood shake on the oldest homes. That distinction decides everything, because the two fail in opposite ways: shingle wears out visibly from above, while tile hides a failing underlayment under tile that still looks brand new.
Read our Orange County tile roof underlayment guide — what a relay costs and when you need one →
As a major Inland Empire hub anchored by Ontario International Airport, Ontario is full of homes and businesses whose roofs quietly do the hardest job on the property. OC Roof Pros brings professional roofing to every corner of Ontario — leak repairs, full tear-off replacements, and new installations backed by real warranties.
From Ontario Ranch, the historic downtown and Creekside, we know the Ontario area and its fast-growing Ontario Ranch new builds plus established neighborhoods. Most repairs are completed in a single visit, and full replacements are typically done in one to three days — tear-off, underlayment, install, and a magnetic nail sweep before we leave.
Full tear-off and re-roof, to code, warrantied.
Leaks traced to the source, not papered over.
Concrete and clay install, repair, and relays.
Architectural shingle in every style and colour.
TPO, torch-down, and coating systems.
Free inspection and an honest condition report.
Just your name and number — a local Ontario roofer will call you within the hour. No bots, no pressure, no long form. We'll cover the details on the call.
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We cover all of San Bernardino County and beyond. Click your city for a local quote page.