Flooring · Lawndale, CA
Putting New Flooring Over a Concrete Slab in Lawndale
Most Lawndale houses sit on a concrete slab, and the slab decides which floors are safe to install. Here is what to test, what to fix first, and how to compare quotes from independent flooring specialists.
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Flooring in Lawndale
Pricing & What to Expect
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Service LevelCost Range
Slab moisture testing, per test location (typical range)$50 - $200
Grinding and prep of slab (typical range)$1 - $3 /sq ft
Self-levelling compound, materials and labour (typical range)$2 - $6 /sq ft
Rigid-core luxury vinyl plank, supply and install (typical range)$5 - $10 /sq ft
Porcelain tile, supply and install (typical range)$9 - $20 /sq ft
Engineered wood over slab, supply and install (typical range)$8 - $16 /sq ft
Plywood subfloor built over slab (typical range)$3 - $7 /sq ft
Crack-isolation membrane under tile (typical range)$1.50 - $4 /sq ft
FAQ
Flooring in Lawndale — Questions Answered
How do I know if my slab has a moisture problem? +
Sometimes you can see it, but often you cannot, which is exactly why testing exists. Visible signs include a white powdery deposit on bare concrete, which is mineral salt left behind as water evaporates through the slab; dark damp patches that come and go with the weather; old vinyl tile that has curled at the corners or lost its adhesive; and a musty smell in a closed room. A quick informal check is to tape a square of clear plastic sheet tightly to the bare slab and leave it for a day or two: condensation underneath or a darkened patch of concrete means moisture is moving. That test tells you there is a problem but not how big it is, so it is a reason to do a proper calcium chloride or relative-humidity test, not a substitute for one. A slab can also pass in one room and fail in another, so testing should cover the whole area.
Can I put solid hardwood over a concrete slab? +
Not directly. Solid wood expands and contracts with moisture much more than engineered board does, and a slab is a continuous moisture source, so a solid floor glued or fastened straight to concrete will cup, gap or buckle. There is also nowhere to nail. The route that does work is building a plywood subfloor on top of the slab, over a vapour retarder, and fastening the hardwood to that. It works well and it is what people do when nothing else will satisfy them, but be clear about the consequences before committing: it adds material and labour cost, and it raises the finished floor by roughly an inch and a half, which means doors need trimming, thresholds to other rooms need rethinking, and any appliance that slides under a counter may no longer fit. Engineered wood with a thick wear layer over a proper moisture barrier gives you a real wood surface without any of that.
Is luxury vinyl plank a good choice over a slab? +
It is one of the better ones, and it is popular in slab-on-grade houses for good reasons. It tolerates moisture far better than wood, most rigid-core products float rather than being glued so the slab does not have to be perfect, and it handles kitchens and bathrooms without special treatment. Two cautions. First, floating floors are unforgiving about flatness: the manufacturer will publish a tolerance, and if the slab is outside it the floor will feel hollow and the joints will eventually separate, so do not let anyone skip the levelling to hit a price. Second, the category covers a very wide quality range. The things that actually differ are the thickness of the wear layer on top, which determines how long it looks new, and the rigidity of the core. Ask for the specific product name and wear-layer thickness in the quote rather than accepting the words luxury vinyl.
What is a moisture barrier and do I need one? +
It is a layer between the slab and the flooring that slows water vapour from reaching the floor covering. It can be a sheet membrane rolled out, a liquid coating applied to the slab, or a barrier built into the underlayment of a floating floor. Which one you need depends on the test results and on what the flooring manufacturer requires, and those two things together decide it rather than a general rule. What matters practically is that the barrier is specified by name in the quote and that it is compatible with both the flooring and the adhesive, if adhesive is being used. A mismatch here is a warranty problem later. Also be aware that a barrier is not a licence to ignore a serious moisture reading: if the slab is genuinely wet, the source usually needs addressing, whether that is exterior drainage, a sprinkler line running against the foundation, or a plumbing leak.
The contractor wants to charge for self-levelling compound. Is that normal? +
Yes, and it is one of the most common causes of a price difference between two quotes for the same room. Slabs are poured to a construction tolerance, not a flooring tolerance, and decades of settlement do not improve them. Self-levelling compound is a cementitious material poured over the prepared slab that flows out flat and cures hard, and it is often the difference between a floor that feels solid and one that does not. What you want to avoid is an open-ended allowance, because that is a blank cheque. Ask the contractor to measure the slab with a straightedge or a laser, tell you how many bags they expect to use and over what area, and give a fixed price with a stated limit beyond which they will come back to you before proceeding. A contractor who has actually measured can do this; one who has not will resist.
Do I have to move out while the floor is installed? +
Usually not, but you should expect the working area to be unusable for longer than the installation itself. The sequence that takes time is preparation rather than the flooring: grinding produces a great deal of dust, self-levelling compound needs to cure before anything goes on top of it, and moisture testing itself takes time in place before results exist. Tile adds grouting and curing. A floating vinyl floor in a single room might be down in a day with the room back in use the next; a tiled floor over a slab that needs levelling is realistically a week. Ask for a day-by-day schedule rather than a total duration, ask specifically which days you cannot walk on the floor, and agree in advance who moves the furniture and where it goes, because that assumption is a frequent source of friction on the first morning.
Are these prices a quote from Tegula Stone? +
No. They are general cost ranges for the Los Angeles area, given so you can sanity-check a bid rather than price a job from a web page. What actually moves the number on a slab project is how much preparation the concrete needs, which nobody can know precisely until it is exposed, along with the product you choose, the room layout, and how much cutting is involved around cabinets, closets and doorways. Get written quotes from more than one independent contractor with the same scope listed in each, and pay as much attention to what is excluded as to the total. Tegula Stone connects homeowners with independent flooring specialists in and around Lawndale; it does not perform the work, does not employ the contractors, and does not set their prices.