Ontario Roof Pros provides professional metal roofing in Ontario, CA for residential and commercial properties across the Inland Empire. Metal is a very good roof in the wrong place more often than people expect. On a wide, nearly flat Ontario warehouse deck, a screw-down metal panel is usually the weaker answer, and we will say that before we quote one.
The reason is movement. Long panels expand and contract through every inland summer day, exposed fasteners work their washers loose, and end laps on a shallow slope sit in water they were never designed to hold. A single-ply or modified bitumen system handles that plane better, costs less to keep dry, and does not need a man on the roof every spring re-torquing several thousand screws.
Where metal earns its money is on real slope. Standing seam in 24-gauge steel on concealed clips, a Kynar finish, panels free to float as they heat, and no fastener passing through the water plane anywhere. On a house, an office, a church or a canopy that is a fifty-year roof with very little maintenance, and it holds its color in this sun better than almost anything else we install.
We also work on the metal this city already has: older R-panel and corrugated on light industrial buildings, mini-storage, awnings and loading canopies. Fastener replacement with oversized bonded washers, butyl tape at the laps, closures renewed at the ribs, and a rib-conforming coating system will often add a decade to a panel roof without a tear-off, a dumpster or a shutdown. On an occupied building that last point is often what decides the scope.
Details we insist on either way. Closures at every open rib end, hemmed and cleated edge metal, panel-specific pipe flashings instead of generic boots, oversized penetration flashings where a line runs through a rib, and separation wherever copper, steel and aluminum would otherwise touch and quietly corrode each other into a leak nobody predicted. Dissimilar metals do their damage slowly and out of sight.
If someone has quoted metal for a flat warehouse roof, ask what minimum slope the panel is listed for and what is holding the end laps together over the long run. When those two answers are vague, the roof will be vague too, and the leak will arrive at a lap in the middle of the third winter rather than anywhere you could have planned for.
Our licensed and insured team brings the right materials and equipment to every job — tapered polyisocyanurate built to a quarter-inch-per-foot fall, hot-air-welded PVC with a KEE plasticizer, tested ANSI/SPRI ES-1 edge metal and coping, two-ply SBS modified bitumen set in cold adhesive, retrofit drains sleeved into existing cast-iron leaders, walk pads routed between rooftop units — and backs the work with a written workmanship warranty. We serve Ontario and nearby communities including Chino, Chino Hills, Montclair, Upland.
What We Handle
Everything our metal roofing in Ontario covers
One crew, one point of contact, and the full range of metal roofing work in Ontario, CA. If it is on this list we do it in house rather than handing it to a subcontractor:
- metal roofing
- standing seam metal roof
- 24-gauge steel panels
- Kynar finish
- concealed clip system
- R-panel repair
- corrugated metal roof
- fastener replacement
- metal roof coating
- metal roof installation
Not sure which one describes your situation? Describe it in plain words and we will sort it out — or browse the rest of our Ontario services.
Materials, equipment and how we do metal roofing
The difference between metal roofing that lasts and metal roofing that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with tapered polyisocyanurate built to a quarter-inch-per-foot fall, hot-air-welded PVC with a KEE plasticizer, tested ANSI/SPRI ES-1 edge metal and coping, two-ply SBS modified bitumen set in cold adhesive, spec them to the job instead of to the invoice, and write the material grades into the free estimate so you know exactly what you are buying.
Every Ontario job runs the same way: site walk and measurements, written scope and fixed price, protection of the surrounding area, then the work itself with a daily clean-up. Years of roofing work in the Inland Empire means we have already met whatever your property is going to throw at us — awkward access, older construction, an HOA with opinions.
Where we do metal roofing outside Ontario
Ontario Roof Pros covers Ontario and the surrounding communities of the Inland Empire. Crews run out to the same nearby cities every week, so an out-of-town job does not mean an out-of-town price.
- Metal Roofing in Chino, CA — San Bernardino County, population 91,403
- Metal Roofing in Chino Hills, CA — San Bernardino County, population 78,411
- Metal Roofing in Montclair, CA — San Bernardino County, population 37,865
- Metal Roofing in Upland, CA — San Bernardino County, population 79,040
- Metal Roofing in Rialto, CA — San Bernardino County, population 104,026
- Metal Roofing in Colton, CA — San Bernardino County, population 53,909
Start on the Ontario Roof Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Ontario Chooses Ontario Roof Pros
- ✓Core cuts and moisture readings before any recommendation, so the scope is based on evidence rather than a walk-around
- ✓Warehouse and industrial work phased by roof section, with every day's area dried in before the crew leaves
- ✓Proposals name the membrane thickness, insulation, fastening pattern and edge detail, so bids can actually be compared
- ✓We quote the repair beside the replacement and recommend the cheaper one when it is the honest answer
The standards behind metal roofing
Quality here is not a matter of opinion — it is written down. The metal roofing work we do in Ontario follows published industry standards: NRCA publishes the Roofing Manual, the industry's reference for details and slope minimums, and Asphalt Roofing Manufacturers Association sets the shingle application and ventilation guidance the warranties reference. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every metal roofing project in Ontario gets the same attention, whether it is a single room or a full commercial job. We show up on schedule, keep the site clean, and stand behind the work — the estimate is free and there is no pressure.
Ready to get started? Call (844) 511-2320 for a free metal roofing free estimate in Ontario, or request a quote and we'll get right back to you.