Ontario Concrete Pro pours driveways, patios and garage floors in Claremont, 10 miles up Euclid and Foothill, on cobble that tilts south. Every estimate is measured and written on site.
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Claremont sits on the fan of stone that San Antonio Canyon has washed out of the mountains, and the fan does two things to a slab. It gets coarser as you go north, and it falls south the whole way.
The cobble is the first problem. Under the Village the fan is sand and gravel that compacts under a plate, but north of Base Line Road it is rounded stone up to fist size sitting loose in sand, and a trench cut to one depth through it leaves soft pockets the slab bridges until a vehicle finds one. So on a north Claremont lot we screen the top 4 inches out and import base, and on a south lot we compact what is already there. A hand test at the estimate tells us which lot you have.
The slope is the second, and it is the one nobody sees. The whole town tilts south from the mouth of the canyon to the 10, so a lot that reads as flat still falls across its width, and a patio poured level to the house sends its water toward the back door. We grade every slab to use the fall the fan already gives it, joint it on a 10 foot grid, and run number 3 steel on an 18-inch grid so the long side down the slope carries itself.
Claremont is old on the south and young on the north, and the work follows that. Craftsman lots around the Village and the Colleges, postwar tracts between Foothill Boulevard and Base Line Road, and the foothill streets above the 210.
Craftsman lots near the Village were poured with a driveway one car wide and a ribbon walk beside it. We take the run out to the street, screen the cobble from the top of the subgrade, and repour it as one slab with a scored layout that matches the old panels.
Back yards in the tracts between Foothill Boulevard and Base Line Road fall toward the house as often as away from it, because the fan tilts south. A patio there is set to the fall the lot already has, poured 4 inches on base and jointed every 10 feet.
Stamped work in Claremont is asked for at the front of the 1920s houses, where a plain gray panel reads as a repair. We cast a flagstone or ashlar pattern into a 4 inch slab, tint it to the house, and seal it twice, because the sun takes the color first.
The parkway trees Claremont is known for have lifted the walk on most of the older blocks. The trees are the city's, so we ask before a root is cut, then deepen the base and repour the panels either side, doweled to the old so the joint stays flush.
Detached garages behind the Village bungalows were floored 4 inches thick straight onto cobble with no steel, and they broke at the door. We replace them over a screened subgrade with mesh through the slab, flat and dry enough to take a coating afterward.
Front entries around the Colleges are seen from the street by more people than most, and the houses were finished by hand. Exposed aggregate with a banded border gives a 1910 house a walk that carries its age instead of a gray patch at the door.
Lots north of Base Line Road and above the 210 step several feet across the back, and the ground there is loose canyon stone. A wall on a Claremont slope is footed into firm material, drained behind the stem, and backfilled with the cobble it displaced.
Garage conversions and back houses near the Colleges are rented to students and faculty, and both need an interior slab someone will live on. We pour over a 10 mil barrier, trowel it flat enough for tile, and cut the joints on the room's grid.
The Village grew up around the Santa Fe depot and the packing houses, and Pomona College was there before most of the streets were, so the blocks between Indian Hill Boulevard and the Colleges hold the oldest concrete in town. Those Craftsman lots were poured by hand with river aggregate, and new work beside them is matched in finish rather than in mix. Permits go to the City of Claremont building division at City Hall on Harvard Avenue, and we pull them under our CSLB C-8 license.
The road in is the one our business is named for. Our yard is on Holt Boulevard in Ontario, and the run is 10 miles up Euclid Avenue and west along Foothill Boulevard, the old Route 66, to Indian Hill. That is inside one day's run for a mixer out of the Ontario plants, so a Claremont pour is placed inside its working window rather than raced. The parkway trees are the city's, and we ask before a root under a walk is cut, because a tree here is a civic matter.
Water leaves Claremont as fast as it arrives. The San Antonio Wash takes the east edge along the Upland line and Thompson Creek comes down the west side out of the foothills, and between them the fan drains through its own stone. That is good for a slab, since nothing sits wet under it, and it means a patio here is graded for the summer sun as much as the winter rain. Back yards south of Foothill face west, so we pour early from June to September and finish before the heat.
Four steps from the call to the signed permit card, and the figure written at the second one does not change at the fourth. Every estimate is measured and written on site, because a south lot and a north lot are two different bases.
Tell us the street and what you want poured. We reply within 1 business day with a time to walk the lot, most often inside the same week.
Victor Salgado digs a hand test to see whether you are on gravel or cobble, measures the area and the fall, and writes the estimate there.
We file with the City of Claremont building division, ask the city before touching a parkway root, and set the pour date.
Base, steel, pour and finish in one morning. Walk on it after 24 hours, park after 7 days, and we close the permit with the inspector.
Send the address and what you are thinking of. We call back within 1 business day, dig a test on the lot, and leave a written figure for the work as specified. Nothing is quoted before we have stood on the ground, since the fan changes by the street.
Reviews
Our own reviews, left by homeowners across the towns we cover. Claremont is among them, and the slabs behind these reviews were dug, based and poured the way this page describes.
“Our place off Euclid is from the 1920s and the drive still ran back to the alley. They replaced 400 square feet at 5 inches, matched the fall to the alley apron and cut the joints the same day. Victor was there from start to finish.”
“We built an ADU in the back garden and needed the slab done properly. They over-excavated the old dairy ground, brought in engineered fill and poured to the soil report. It passed inspection first time, which is not what I expected.”
“The warehouse yard on Jurupa Street was breaking up under the forklifts and we could not shut down to fix it. Ontario Concrete Pro poured 2,800 square feet at 6 inches over two weekends so we never stopped shipping. A year on the joints are still tight.”
The six things Claremont homeowners ask before they book, covering cost, the permit counter, the drive from Ontario, cobble under the slab, how long a driveway is out of use, and the towns next door.
What is under the slab first. North of Base Line Road the fan is cobble that has to be screened out and replaced with base, and that is a day of work a south lot does not need. Then access, since the Craftsman lots near the Village have driveways one car wide and a mixer cannot reach the back. Then area, thickness, steel and finish. Every estimate is measured and written on site, never off a rate.
Yes for most of it. The City of Claremont building division permits slab work and driveways, and the approach where a drive meets the street sits in the city right of way, so it takes an encroachment permit as well. We file both under our CSLB C-8 license and book the inspections. A patio replaced in its own footprint at grade is the usual exception, and we say which side of the line your job is on.
Ten miles, up Euclid Avenue and west along Foothill Boulevard, or the 10 to Indian Hill Boulevard when Foothill is slow. We reply within 1 business day and can usually walk a Claremont lot within the week. The short run is also why we can put a crew back on a job the day after a call, and why a ready-mix load reaches a Claremont pour with its working time intact.
Because it is sitting on cobble. The fan out of San Antonio Canyon coarsens as it climbs, so under the streets above Base Line Road and the 210 it is rounded stone in loose sand rather than the gravel under the Village. A base cut to one depth over cobble leaves soft pockets between the stones, the slab spans them, and the first heavy load finds the void. Screening the top 4 inches out removes it.
Two to four working days on site, then the cure. Breaking out the old drive is a day, screening cobble and laying base is a day on a north lot, and forms and the pour are a morning. Walk on it after 24 hours, park on it after 7 days, and treat 28 days as full strength. The permit review is at the front of the calendar, so the counter sets the start and the crew sets the end.
Upland across the wash, Montclair to the south, and La Verne, San Dimas and Glendora along the foothills to the west, all from the same Ontario yard. If your street sits on the Upland or La Verne line, the page for that town describes the same crew, the same license and the same written estimate, so either one is the right one to read.
Claremont shares the San Antonio Wash with Upland, a boundary with Montclair to the south and the foothills with La Verne to the west, and we cover all three from Ontario. If your street runs along one of those lines, the page next door is the one to read.
Open the Ontario Office in Google Maps Call the yard or send the address. We are 10 miles down Euclid Avenue in Ontario, we hold a CSLB C-8 license, and the estimate is measured and written on your own lot.