Concrete floor installation in Simi Valley CA - a firm, level base for your flooring
Old floor cracked and out of level, or a new room waiting on a slab? We build the base and barrier your flooring depends on.
- Licensed and insured.
- Free quotes on site.
- Replies within 1 business day.
What goes into a new concrete floor in Simi Valley?
Concrete floor installation in Simi Valley means building a flat interior slab from the ground up. We dig out the soft dirt, pack a firm base, lay a vapor barrier and steel, then pour and finish concrete you can live on as it is or cover with tile, wood or carpet.
Most floor calls come from a room that's changing, like an addition, a workshop or a garage floor that's cracked and sunk and has to come out. The price moves with the size of the floor, how much old concrete or soft ground has to be hauled off, how close the truck can get and what the floor has to carry. The schedule turns on any permit, the ground prep and the days of curing after the pour. I'll walk through each of those with you on site, and the written estimate gives you your own figure.
How do you know an old concrete floor needs replacing?
Cracks with raised edges
When one side of a crack sits higher than the other, the slab has usually moved because the dirt under it settled or was never packed. Patching the line won't stop that, and the longer you wait, the more it catches toes, chair legs and any tile laid across it.
Flooring that won't stay down
Tile that pops loose, vinyl that bubbles or glue that turns gummy often points to moisture coming up through a slab with no barrier or a torn one. New flooring over that slab usually fails the same way, so it's worth finding out before you buy more.
A floor that's sunk or sloping
If a ball rolls to one corner or a door starts to drag, part of the floor has usually dropped over soft fill. It rarely stops on its own, and every month it goes on, doors and flooring fit a little worse.
How we handle concrete floor installation
I start by asking what the floor will carry and what goes on top, because a slab for a workshop isn't the same slab as one under engineered wood. Then our crew breaks out any old concrete and digs out topsoil and soft spots down to firm subgrade, the ground the slab sits on. We pack the base material in layers with a compactor instead of raking it level. We set forms so the finished floor meets your doorways and existing floors at the right height, then lay the vapor barrier, a heavy plastic sheet that stops ground moisture from coming up, and patch every tear before the rebar goes in. Rebar is the steel inside the slab, and it holds the pieces together if the slab cracks. We pour in the cooler part of the day and trowel the top smooth. Then we cut control joints, shallow grooves that give cracks a place to form where we chose, and keep the slab damp while it cures, which is the hardening time that gives it strength. I'll tell you up front that a concrete floor will likely show some cracks, and that's part of why the base and the barrier get our extra care, because the flooring you put down later depends on them. If the budget has to give somewhere, I'd rather it come off the finish than the base, because you can redo a surface, but you can't fix a base without tearing out the floor and everything you've laid on it.
A new floor rarely ends at the wall. Where it sits above the yard, we build concrete steps at the door so the drop is even, and where a room opens onto a pool, our concrete pool decks can be poured to meet the floor cleanly at the threshold.
A smooth slab for tile, wood or carpet
This suits living space, an addition or a garage conversion, because finished flooring needs a flat, troweled top and an intact barrier underneath. We watch the height most closely here so the new floor lines up with the rooms next to it.
Bare concrete for a shop or storage room
This suits a space where the concrete itself is the finished floor and takes carts, tools and spills. We set the steel for what the floor will carry and leave the top smooth or lightly textured, depending on whether it'll get wet.
Get a written estimate for your new concrete floor
Send the floor's size, what the room is for and the flooring you plan to lay. We reply within one business day, and I come out for a free written estimate with no obligation.
(805) 261-5009- Based in
- Simi Valley, CA 93065
- Hours
- Mon–Fri: 6 AM–9 PM, Sat–Sun: 8 AM–10 PM
What happens after you call about a concrete floor?
Here's how a floor job runs from your first call to the finished slab, and who you'll deal with at each step.
Call or send the details
Call (805) 261-5009 or use the form, and tell us the floor's size, what the room is for and what flooring you plan to lay. We'll set a time for me to come out.
Walk the site with me
I look at the ground, the doorways and any old slab, and I ask a lot of questions before I put a number on anything. Your written estimate lists the base work, barrier, steel and finish separately, so you can see where the money goes and compare bids line by line.
Sort out permits, then prep
Once you say go, we take care of any permit with you, as covered in the Simi Valley section below. Then our crew digs out, packs the base and sets the forms, barrier and steel, and I check those before any concrete arrives.
Pour, cut joints and cure
We pour, finish and cut the joints, then start curing right away. When we're done, we clean up and walk the floor with you.
Why Simi Valley homeowners call Custom Simi Valley Concrete for floors
Licensed and insured in California
We're licensed and insured, and we'll show you both before anything is signed. That's the first thing to check with any crew pouring concrete at your house, and the FAQ below covers which California license fits floor work.
I price every job in person
I come out myself to look at the job and give the estimate, and a crew lead runs the work day to day with our crew. I stop by at the steps that matter most, like the packed base and the barrier before the pour, because nobody can see them afterward.
Framing first, concrete since 2017
I framed houses for years before starting this business in 2017, so I think about the walls, doors and flooring that will sit on your slab. Jobs that need some figuring, like a floor that has to meet an old slab or a house just right, are the ones we like.
Every floor we pour is backed by our satisfaction guarantee. Have the floor's size and your planned flooring handy, then send us the details or call (805) 261-5009.
Concrete floors, permits and grading in Simi Valley
Simi Valley requires a construction permit before a new building, a remodel or an addition to an existing building, so a floor that's part of that kind of project will likely need one. Whether a floor on its own needs a permit isn't settled, and I won't guess, so the city's Building and Safety Division is the place to ask, at (805) 583-6723. Grading is also work the city issues permits for, which can come up when we have to cut into a slope to set a floor, and the city answers grading questions at (805) 583-6786. When a job needs a permit, I tell you which office handles it. We can pull it as your contractor, or help you if you'd rather pull it yourself as an owner-builder, which the city handles with its own packet.
We're based in Simi Valley and take jobs across the cities around it. A lot of the floors we see here have to step down to a sloped yard or tie into an older slab that needs cutting, so I measure heights at every door before we set forms, and we see the same kind of work on jobs in Thousand Oaks and Moorpark.
Questions about concrete floors in Simi Valley
Will my new concrete floor crack?
It will probably show a few cracks, even if it's built right. National guidance on floor construction says a floor with no cracks and no curled edges isn't realistic, even with good design and careful work. We'll agree on what to expect and where the joints go before the pour, so nothing comes as a surprise.
What causes cracks in a new concrete floor?
Most cracks come from how the floor was built, like missing or poor joints, poor ground prep, extra water added to the mix on site, poor finishing and little or no curing. Each one is a fair question to ask a contractor before you hire them, and we're glad to answer all five.
How much does a concrete floor cost in Simi Valley?
In the Los Angeles area, a reinforced concrete slab usually costs about $8 to $15 per square foot, and that's the market's price, not a quote from us. That range covers the slab with its steel, so old concrete to break out or a hard-to-reach room can push a job higher. Your own figure comes from the written estimate after I've seen the site.
What license does a concrete contractor need in California?
California's C-8 Concrete Contractor license covers flatwork, the flat pours like floors, slabs and driveways, and the Contractors State License Board licenses home improvement contractors. State law counts building or improving garages, basements, patios and driveways at a home as home improvement work. If a general contractor with a "B" license holds your contract, ask which license the crew doing the pour holds, because a B contractor needs that specialty license or a licensed specialty contractor to do the work.
Why does a concrete floor need a vapor barrier?
It keeps moisture in the ground from coming up through the slab and ruining the flooring on top. One barrier maker's guide says even small holes can sharply raise the water vapor that comes through, which can lead to flooring failures and delays in putting your flooring down. Ask any crew how they'll keep the sheet whole while they walk on it and set steel.
How long does a new concrete floor need to cure?
General guidance calls for curing to start as soon as possible, with a sprayed curing compound or damp burlap kept moist for at least 3 days. Plan for those days of care right after the pour, because a slab that dries out too fast ends up with a weaker top.
Related concrete work around a new floor
If your new room or pool house opens onto the water, a pool deck poured to match the floor height keeps the threshold even and easy to cross.
When the finished floor sits above the yard or driveway, poured steps at the door give you even step heights and a landing set on packed ground.
Cities we serve for concrete floors
Custom Simi Valley Concrete is based in Simi Valley, California, and we pour floors across the cities around it, including Camarillo and Santa Clarita. The 12 cities below each have their own page, and if yours isn't listed, ask us.
Simi Valley, CA
Get your concrete floor priced on site
Calling before you choose your flooring lets us plan the base, barrier and finish around what's going on top.