Ontario, CA Residential Roof Installation — Residential & Commercial

Ontario Roof Pros provides professional residential roof installation in Ontario, CA for residential and commercial properties across the Inland Empire and the eastern San Gabriel Valley. Roofing a structure that has no roof yet is a different job from replacing one. New houses, additions, garage conversions, a deck stripped to bare plywood because the sheathing is being replaced. The sequence drives everything, and in this valley so does the energy code.

Two requirements land on a new Ontario roof at once. The residential code puts a Class A fire-retardant covering on every newly constructed roof statewide, tested to UL 790 or ASTM E108.

On top of that, the energy standards set a steep-slope reflectance floor for new single-family roofs in climate zones ten through fifteen, and this part of the Inland Empire sits inside that band. Both apply to the same roof and neither substitutes for the other.

The prescriptive numbers are a three-year aged solar reflectance of 0.20 with a thermal emittance of 0.75, or a solar reflectance index of at least 16, and the product has to be rated and labeled by the Cool Roof Rating Council. There is an exception worth knowing. A roof construction weighing at least twenty-five pounds per square foot is exempt, which is why concrete tile sidesteps the color conversation entirely.

New single-family homes here come with a solar array, and the array has to be laid out before the underlayment goes down rather than after. We mark the racking rows on the bare deck, set flashed mounts into the shingle courses as we lay them, and keep the required access pathways clear. Retrofitting attachments through a finished roof is how a new roof starts leaking. Conduit routes get agreed with the electrician at the same time.

The city's building department inspects the roof sheathing and its nailing before any covering goes on, and the Class A rating is proved on paper rather than by eye. We hand the inspector the evaluation report or listing for the exact assembly, underlayment included, because an approved shingle over the wrong underlayment is not the assembly that was tested. Nothing gets covered on a guess here.

The part we lose money on. If you are buying in a tract and the builder's roofer is already scheduled, their price on a repeated roof plan will beat ours and should. Our value sits on a custom lot, an addition, or an accessory dwelling where the roof has to meet something that already exists and the uplift details around a Santa Ana wind matter.

Our insured and bonded 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 the Work Includes

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 residential roof installation

Quality here is not a matter of opinion — it is written down. The residential roof installation 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 residential roof installation 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 (866) 875-9250 for a free residential roof installation free estimate in Ontario, or request a quote on our contact page and we'll get right back to you.

Other Work We Do

• Commercial Roof Installation
• Roof Replacement
• Roof Repair
• Asphalt Shingle Roofs