Ontario Water Restoration Pros provides professional roof leak & roof drain water damage in Ontario, CA for residential and commercial properties across the Inland Empire. Chase the drain, not the stain. On a low-slope commercial roof the wet ceiling tile is almost never under the breach, because water runs sideways along the flutes of a metal deck until it finds an opening, and that can be a long way from where it entered.
The buildings here are mostly single-ply membrane over rigid insulation on steel deck, drained through internal roof drains with an overflow scupper or secondary drain set a couple of inches higher. That system is reliable right up until the primary drain blocks. Then the roof does what it was designed to do and ponds, and the standing water finds the weakest seam, curb or fastener penetration.
Rooftop equipment supplies the rest of the calls. A condensate line that has grown a biofilm backs up into the pan and overflows through the curb. A unit that was reset on the curb without new flashing leaks the first time wind drives rain across it. Both look like roof failures from inside and are fixed by a mechanical contractor.
Our part is finding the path and drying the assembly. Thermal imaging over the deck and the ceiling plane, meter readings to establish the wet field, tiles or gypsum opened along that field rather than at random, and the insulation checked. Saturated rigid board above the deck does not dry from inside the building; if it is wet it has to be cut out from the roof side and replaced.
We do not sell roofing, which makes the recommendation easier to trust. Sometimes it is a repair to a seam. Sometimes the honest answer is that the membrane is at the end of its service life and a fourth patch is throwing money at a roof that needs replacing, and we will say that in the report even though it is not our work.
With 15+ years of experience, our licensed and insured team brings the right materials and equipment to every job — desiccant dehumidifiers for large open volumes, low-grain refrigerant dehumidifiers, HEPA-filtered negative air machines, 6-mil poly critical barriers and hard containment, ASTM F2170 in-situ concrete relative-humidity probes, penetrating and non-penetrating moisture meters — 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 roof leak & roof drain water damage in Ontario covers
One crew, one point of contact, and the full range of roof leak & roof drain water damage work in Ontario, CA. If it is on this list we do it in house rather than handing it to a subcontractor:
- roof leak water damage
- roof drain overflow damage
- flat roof leak repair
- TPO membrane leak
- commercial roof leak cleanup
- ceiling leak drying
- metal deck water tracking
- rooftop unit condensate leak
- scupper blockage
- emergency roof tarp
- insulation saturation roof
- warehouse roof leak
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 roof leak & roof drain water damage
The difference between roof leak & roof drain water damage that lasts and roof leak & roof drain water damage that gets redone in three years is almost always preparation and materials, not the finish you see on day one. We work with desiccant dehumidifiers for large open volumes, low-grain refrigerant dehumidifiers, HEPA-filtered negative air machines, 6-mil poly critical barriers and hard containment, 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. 15+ years of water damage 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 roof leak & roof drain water damage outside Ontario
Ontario Water Restoration 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.
- Roof Leak & Roof Drain Water Damage in Chino, CA — San Bernardino County, incorporated in 1910, population 91,403 at the 2020 census
- Roof Leak & Roof Drain Water Damage in Chino Hills, CA — San Bernardino County, incorporated in 1991, population 78,411 at the 2020 census
- Roof Leak & Roof Drain Water Damage in Montclair, CA — San Bernardino County, incorporated in 1956, population 37,865 at the 2020 census
- Roof Leak & Roof Drain Water Damage in Upland, CA — San Bernardino County, incorporated in 1906, population 79,040 at the 2020 census
- Roof Leak & Roof Drain Water Damage in Rancho Cucamonga, CA — San Bernardino County, incorporated in 1977, population 174,453 at the 2020 census
- Roof Leak & Roof Drain Water Damage in Fontana, CA — San Bernardino County, incorporated in 1952, population 208,393 at the 2020 census
Start on the Ontario Water Restoration Pros homepage for a free estimate, or call (844) 511-2320 and describe the job.
Why Ontario Chooses Ontario Water Restoration Pros
- ✓A person answers at two in the morning — not an answering service that calls you back after breakfast
- ✓Commercial work phased around your shifts so the building keeps operating while it dries
- ✓Desiccant capacity sized for warehouse volumes, not a van full of household dehumidifiers
- ✓Daily psychrometric logs and moisture maps written the way an adjuster reads them
The standards behind roof leak & roof drain water damage
Quality here is not a matter of opinion — it is written down. The roof leak & roof drain water damage work we do in Ontario follows published industry standards: IICRC publishes the S500 water-damage restoration standard, and EPA mold cleanup guidance sets the remediation thresholds and containment practice. If a contractor cannot tell you which standard a detail comes from, that is worth asking about before you sign.
Every roof leak & roof drain water damage 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 roof leak & roof drain water damage free estimate in Ontario, or request a quote and we'll get right back to you.