Jurupa Valley Concrete Pro casts interior floors on a sealed 15-mil retarder and closes them flat enough for plank, tile or a polish to sit on. Every estimate is measured and written on site.
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Floors inside a finished building
An interior floor goes into a room that already has walls, a roof and one doorway, and that shapes the whole day. No machine swings inside it, the concrete arrives by barrow or through a pump line, and out of the sun the surface stiffens slowly, so the trowel passes run late into the evening. What the floor has to be is settled well before that morning: flat enough for whatever is laid on top of it, and dry enough that the covering stays stuck to it.
Jurupa Valley Concrete Pro was founded in 2025 by Daniel Reyes, after 12 years on Inland Empire crews, and he walks the straightedge behind the screed himself. Three rooms account for most of this work here. An ADU on a lot with the room for one, a bedroom or family room added onto a house in Pedley or Glen Avon, and the detached shop or barn at the back of an acre lot that is being turned into living space or a workshop somebody actually works in.
A floor replacing a floor inside the same walls is minor work. A floor under new habitable space belongs to that building permit, and where the walls are new as well the pad beneath them is a slab foundation rather than a floor. The crew holds a CSLB C-8 concrete license with liability insurance on every job, works to the California Residential Code, and every floor carries a written workmanship guarantee against defects in how it was built.
Warning signs
A barn, tack room or shop with a dirt floor, or a two-inch skim somebody mixed on site, cannot carry a covering or a permit. There is nothing under it to stop ground water, nothing to hold a fixing, and no thickness to cut a joint into, so the floor is built rather than repaired.
Cardboard that darkens where it sits, tools going orange on a bottom shelf and a slab that stays cool and tacky in February are all one thing: vapor moving up out of the ground. A humidity probe set at 40 percent of the slab depth turns that into a figure you can act on.
A line that shows through plank or sheet vinyl in the same place every time is the slab underneath opening, not the covering wearing. Concrete with no joints cut into it chooses its own, usually from a door opening or an inside corner, and it will find the new floor as well.
Rest a 10-foot straightedge on the floor and rock it. More than 3/16 of an inch of daylight under the middle puts a wardrobe on three feet, leaves lippage between tiles and shows as a wave once any sheen goes on it. Leveling compound spread thin over that cracks back out.
What's included
Standard on every interior floor, in the order the room goes through them. Each line is there because a floor inside a building is judged on how flat and how dry it is long after the strength has stopped being interesting.
Shot off the rooms and thresholds the floor opens into before a shovel goes in, so a door still clears its covering.
A thin pad is broken up and carried out by hand through the one doorway, and soft ground below it is dug out with it.
Class 2 base laid in 4-inch lifts and rolled until it stops moving, because the sheet above it can only lie as flat as this.
An ASTM E1745 Class A sheet, lapped, taped and sealed at every pipe and post, with concrete cast straight onto it.
Reinforcement tied and chaired at mid-depth, which is the only height in the slab where it does the floor any good.
Cuts set out on paper to run off door openings and past any post landing inside the floor, then sawn the same day.
Screeded, machine troweled and checked with a straightedge against the tolerance written on your estimate.
Probes read at 28 days and the numbers handed to whoever lays the covering, with the written guarantee.
Your options
The slab underneath is the same in all four. What changes is what is asked of the surface, and that is decided in the room at the visit rather than after the concrete is down.
| Option | Where it fits | Flatness needed | Upkeep | Time on site |
|---|---|---|---|---|
| Ready for a covering | Bedrooms and living space in an ADU or addition | 3/16 of an inch under a 10-foot straightedge | Whatever the plank or tile above asks | 2 days, then 28 before laying |
| Troweled and sealed | Workshops, hobby rooms, storage in a converted barn | Straightedged, with no covering to satisfy | Reseal about every 3 years | 2 days, then 7 to cure |
| Ground and polished | A shop or studio kept as bare concrete | Ground true, the tightest of the four | Dust mop, burnish about every 5 years | 2 days, then 3 grinding at 28 |
| Tubing in the slab | An uninsulated outbuilding used through winter | As the finish over it asks | Flush and pressure test the loops yearly | 3 days, then 7 to cure |
The finish is chosen before the pour, not after it, because the mix, the trowel passes and the joint layout all follow from it.
Local knowledge
Most interior floors here go into buildings that were never meant to be lived in, and the rest go into buildings full of pallets.
Lots out here run to an acre and more, and plenty came with a detached shop, barn or stable the family no longer uses. Turning one into an ADU or a workshop is the commonest interior floor we cast, and it is a harder room than an addition: the walls are up, the posts of a pole frame land inside the floor area, and the only way in is a single door. So the joint grid is drawn around those posts and openings first, and concrete arrives by barrow or pump line rather than off a chute.
The other half of the work is the light-industrial ground around Mira Loma, where a unit in the warehouse corridor gets a floor built for what stands on it rather than what is laid over it. Under both, on the flats, is Santa Ana River sand, which drains fast and passes vapor upward for the life of the building, so an interior slab here is cast on a lapped and taped sheet and then read with a probe rather than by eye. A floor still reading wet at 28 days keeps the covering in its boxes.
Our process
Five stages from the measurement to the day the readings are handed over. The two that decide the result both happen before any concrete is ordered: the height the floor is set to, and the flatness the finish is written to.
Daniel Reyes measures the room, shoots the height off the doorways and works out how concrete can reach the far corner.
You settle the finish and the tolerance it needs, the cuts are drawn around posts and openings, and any permit is filed.
The old pad or the topsoil leaves through the door by hand, and the ground is cut to the depth the new floor needs.
Base in compacted lifts, the retarder lapped, taped and sealed at every pipe and post, then reinforcement tied on chairs.
Placed, screeded and machine troweled, joints sawn the same day, kept damp a week, then probed at 28 days.
What moves the estimate
Floor area starts it and access finishes it, because every yard of concrete has to travel through one door into a room that already has a roof on it. Both are settled standing in the room. Every estimate is measured and written on site.
A truck at the door takes a chute. A shop 150 feet down an acre lot takes a pump line or barrows, and both add a crew.
A pad broken out is a straight swap. Bare ground means topsoil out and base in before anything can be measured for flat.
A sealed shop floor and a slab ground true for plank are different amounts of work over the same square footage.
Tubing brings rigid insulation under and around the slab, a manifold, and a pressure test held right through the pour.
The visit and the written figure cost nothing, and you hear back within 1 business day once the form reaches the yard on Limonite Avenue. (951) 903-5460 or send us a message.
Send the form or call the yard on Limonite Avenue. Daniel Reyes measures the room, shoots the height off the doorways and leaves the figure written with you, and nothing is owed whichever way you go.
Reviews
Left on Google, Facebook and the BBB by people whose interior floors this crew cast. All three are rooms inside a building rather than drives, patios or yard work.
“Our old stable had a dirt floor and two posts standing in the middle of it. They drew the saw cuts around the posts before they poured, and a year on there is not a crack anywhere in the room. It is my woodshop now and the dust sweeps straight off it.”
“We built an ADU for my mother at the back of the lot. The flooring people wanted a moisture number before they would lay anything, and Daniel had already probed it at 28 days and written the reading down. Nobody argued and the plank went down that week.”
“The floor in our unit off Etiwanda had been poured on nothing and dipped half an inch across the middle. They took it out through the roll-up door, rebuilt the base and left it flat enough that the racking sits level without a single shim under a leg.”
FAQ
Height, flatness, moisture, joints and heating, answered for a converted outbuilding or a new room on a lot out here rather than for concrete in general.
Three things: the area of the room, how the concrete gets into it, and the tolerance the finish is written to. A room a truck can chute into is a shorter day than a shop 150 feet down the lot needing a pump line, and bare ground costs more to prepare than an old pad does to break out. The figure is measured and written in the room itself.
Yes, and out here it is the job we do most. Topsoil is dug out to firm ground, base goes back in compacted lifts, the vapor retarder is lapped and sealed around every post and pipe, and the slab is cast at the depth the use asks for. Because the building is already standing, all of it comes in and out through one doorway, which is what makes it a longer job than an open pour.
Yes, once the room becomes habitable space, because the floor is then part of a conversion that is drawn, permitted and inspected like any other. A floor replacing a floor inside walls that keep the same use is minor work. Both go through Building and Safety at the City of Jurupa Valley, and we file the set and meet the inspector rather than sending you to the counter.
Within 3/16 of an inch under a 10-foot straightedge, which is the figure most plank and click-lock makers write into their warranty. It is what the wet slab is screeded to and what the finished floor is checked against before the crew leaves. Past that number the locking edges start carrying load the floor should, which is what makes a new covering drum underfoot in its second year.
About a month. The slab is kept damp for the first seven days, reaches full strength at 28, and only then can a relative humidity probe be read fairly. Most makers refuse to warranty a covering over a reading above 75 percent, and the Portland Cement Association is plain that with a sheet underneath, the water has to leave through the top face.
On a grid no wider than 12 feet, pulled so the lines run off the door openings and pass either side of any post standing in the floor. A slab left to itself cracks from an inside corner outward, and a post cast into the middle of a bay is exactly that corner. The cuts are drawn on paper at the visit and sawn within hours of the finish.
Yes, and it suits a converted outbuilding more than a house does, because those slabs were never insulated from the ground. Rigid board goes under the floor and around its edge first, the loops are tied to the reinforcement so they sit inside the concrete rather than beneath it, and they are pressure tested and left under pressure with the gauge visible through the pour.
Concrete shrinks as it dries, so the floor is jointed to decide where that shows instead of leaving it to choose. Under a covering the cuts are filled flush so nothing prints through; on a polished floor they are part of the layout. a written workmanship guarantee against defects in how it was built covers the base, the retarder, the depth and the finished flatness, and a claim is one call to the number on it.
Service area
The eight towns nearest the yard on Limonite Avenue, with the straight-line distance beside each. An outbuilding waiting to be converted looks much the same in all of them.
Four jobs that meet an interior floor at a wall, a doorway or a post, measured on the same visit and written onto one estimate rather than quoted by two trades.
The engineered pad new walls stand on, where an ADU is built rather than converted.
The bay that stays a garage, poured for a vehicle instead of for a covering.
Sawing a drain line, a doorway or one bay out of a floor that stays put.
A thickened pad under a post, a mezzanine leg or a machine base in the same pour.
Call the yard on Limonite Avenue or send the form and you hear back within 1 business day. Tell us the size of the room and what is going on the floor, and the measurement can usually be booked inside the week.