Polished Concrete Floors in Austin, TX
Polished concrete is your existing slab ground flat with diamond tooling, hardened with a liquid densifier and refined with finer pads, so the shine is in the concrete, not in a coating; in Austin, what decides the job is whether the slab is hard and sound, how much stone you want to see and how much gloss you want. The Concrete Polishing Council of the ASCC defines the work as changing "a concrete floor surface, with or without aggregate exposure, to achieve a specified level of finished gloss." The governing specification, ACI SPEC-310.1-20, comes from Joint ACI-ASCC Committee 310. A densifier is a silicate liquid that reacts "in the surface of the concrete to produce additional calcium silicate hydrate (CSH)." Because a polish refines the surface already there, the slab's cracks, patches and stains stay in the finished floor.
Survey prices climb with gloss and with how much stone the grind exposes. In HomeGuide's February 2026 survey a basic finish runs $3 to $12 a square foot and decorative work $5 to $15 or more; by gloss, soft matte runs $3 to $6 and high gloss $6 to $15, and by exposure, a cream finish $3 to $8 and full aggregate $6 to $12. HomeGuide adds that floors under 1,000 square feet often run $8 to $15 or more. Angi's April 2026 page prints $3 to $8 for a garage and puts labor at 60% to 70% of the total; its July 2026 page adds $3 to $5 per square foot for each extra grind. All are national; none of the surveys we use prices Austin. Our full price table sets these beside the coating rows.
The Council names three stages by grit, the abrasive's size number: grinding at "100 grit or lower," honing with "diamond tooling within the 100-400 grit range," and polishing with "diamond tooling that is 800 grit or higher." The densifier goes on part way; the September 2009 Concrete International article the ASCC hosts applies "a hardening silicate after either the 80 or 150 grit pass." The Council lists sodium, potassium and lithium silicates, and PROSOCO's sheet for Consolideck LS, a lithium silicate, gives 500 to 800 square feet per gallon on steel-troweled concrete. A guard may finish the floor: semi-impregnating stain protection, in the Council's terms, leaves "a protective surface film of less than 0.5 mils," a mil being a thousandth of an inch. Color comes from a dye or an acid stain; see stained concrete floors for both.
The slab decides whether a polish is possible. ACI 310.1-20 Section 3.1.4.1, quoted in the Council's Position Statement #7, calls for "Mohs Hardness measured on slab surface is greater than 4," Mohs being a scratch-hardness scale; the 2009 article calls a 3500 to 4000 psi mix "more than sufficient, especially when polishing commences at least 28 days after placement." Housing here is young: the ACS 2020-2024 median year built of housing units is 1994 in the City of Austin and 2006 in Williamson County (table B25035; see our Austin numbers page), a measure of the housing, not of slab age. For a slab poured in recent months, Metzger/McGuire's Bulletin T5 reports that "ACI and PCA both recommend delaying of filling for 60-90 days after slab placement." Houston Black, a clay east of the Balcones Escarpment, has "High shrink-swell potential" in its NRCS series description, though no source we hold ties it to slab cracks directly. Old carpet, adhesive and coatings come off first, at $1 to $3 per square foot on Angi's April 2026 page.
HomeGuide's February 2026 page says most residential polishing projects "take 2 to 4 days for spaces up to 2,000 square feet"; grit steps, crack and joint work and resin cure decide where a job falls. The densifier is quick: PROSOCO says "Most floors can be opened to traffic within one hour of treatment." Joint fillers set the slower clock, and Metzger/McGuire's MM-80 epoxy filler reads "LIGHT TRAFFIC READY @ 70 degrees F - 6-8 HOURS." That time assumes 70 degrees F, while NOAA's 1991-2020 normal daily maximum at Austin Camp Mabry is 97.8 degrees F in August and 96.6 degrees F in July, readings of outdoor air rather than of the slab; we take air temperature, slab temperature and dew point readings before any filler is mixed. Before we come, clear the room; afterward, dust mop it daily.
Tell us the room size, what covers the slab now, and the gloss level and aggregate class you have in mind. Our free written quote follows a visit to measure the floor and test the slab, and lists the grit steps, densifier, any dye or guard, crack and joint work, dates and price, and what is and is not covered. On the City of Austin's permit-exemption page, one line reads "Painting, papering, tiling, carpeting, cabinets, countertops, and similar finish work"; polishing is not named in that line, so ask Austin Development Services when unsure. Texas Comptroller publication 94-116 says "Labor to repair, remodel, or restore residential real property is not taxable," while "the total amount charged for remodeling, repairing, or restoring nonresidential real property is taxable." The quote shows how tax applies to your job; the Comptroller or a tax adviser is the authority on it.
When polishing is the right job for your slab
Polishing suits a slab hard, sound and bare enough to be the finished surface, since only a thin guard goes over it. You can check these conditions before our visit; if several fit, price a polish against a coating. The note below the list covers what rules it out.
- Carpet, tile or vinyl is coming up from a slab-on-grade room, and you would rather finish the concrete than buy new flooring.
- Sweeping raises fine powder, the dusting NRMCA CIP 1 treats with a silicate hardener or by grinding to durable concrete.
- The room is a living area, office, showroom or shop worn by foot traffic and grit rather than acids.
- The visible cracks are few and narrow, and you accept that they and any old patches will show in the finished floor.
- You want the concrete's stone to show, from the cream of Class A to the full aggregate of Class C.
- Someone will dust mop the floor daily, and it can be resealed or repolished every few years.
A polish is the wrong first step for a slab that is crumbling, rocking, heaving or sinking, which a Wolverine Coatings bulletin written for coatings (Rev 230913) calls "an unlikely candidate for coating without repair." Delaminated areas, "detected by a hollow sound when tapped with a hammer or with a heavy chain drag" in NRMCA CIP 20's words, are cut out and patched, a step Metzger/McGuire's Bulletin T21 puts "prior to, or early on, in the concrete polishing process."
Grit stages, gloss levels 1 to 4 and aggregate classes A to C
A polished floor is graded by how sharply it reflects, measured in distinctness of image (DOI), how clearly a reflected object can be made out, and in haze. The Council's appearance chart (code PCAC - 11.23) sets four levels: Level 1, "Exposed/Flat (Ground)," DOI 0 to 9; Level 2, "Exposed/Satin (Honed)," DOI 10 to 39; Level 3, "Polished," DOI 40 to 69; and Level 4, "Highly Polished," DOI above 70, each with haze under 12.
The 2009 Concrete International article runs from "40 grit metal-matrix segments" through 80 and 150 grit, then resin pads from 100 to 3000 grit, "with the 1500 and 3000 grit pads producing the highest sheen." Exposure is chosen before the first grind, since grinding removes concrete and cannot put it back. On the Council's exposure chart (dated 2-2024), Class A, the cream finish, reads "85 - 95 % Cement Fines"; Class B, salt and pepper, "85 - 95 % Fine Aggregate"; and Class C "80 - 90 % Full Aggregate." Position Statement #2 found slip resistance "is not affected by the aggregate exposure class," so the class turns on looks and price.
Wet slip readings and the daily care a polish needs
Wet polished slabs beat the tile industry's slip threshold in the Council's own tests. Position Statement #2 (10/2017) tested against a "minimum dynamic coefficient of friction of 0.42 for tiles in level indoor areas that may get wet in use." Dynamic coefficient of friction (DCOF) is, in the Tile Council of North America's words, "the ratio of the force necessary to keep a surface in motion sliding over another surface, divided by the weight (or normal force) of the sliding object." Slip resistance "does vary based on the gloss level," the Council found, yet every result cleared 0.42. The current standard is ANSI A326.3, and TCNA cautions that DCOF does not predict whether a person will slip.
A guard changes the surface underfoot, and H&C's clear sealer sheet warns "Surfaces may be slippery when wet." Care is daily: the 2009 Concrete International article sets "daily dust mopping" and says "Avoid cleaners that are highly alkaline or acidic as these will quickly dull a polished floor." PROSOCO adds that "acid concentrates and acidic foods may etch the floor" even after its densifier, so wipe up juice, wine and battery acid quickly. Angi's April 2026 page says home floors "should be polished every three to five years," and This Old House says "Resealing every 3-5 years is usually sufficient."
Silica dust from floor grinders: OSHA Table 1, entry (xiii)
Grinding concrete makes respirable crystalline silica dust, and federal OSHA's construction rule, 29 CFR 1926.1153, sets how a floor grinder is run. OSHA names "Silicosis, an incurable lung disease that can lead to disability and death" among the illnesses tied to breathing it.
The exposure limit is 50 ug/m3 as an 8-hour time-weighted average, the unit being micrograms per cubic meter of air, with an action level of 25 ug/m3. Table 1, entry (xiii), "Walk-behind milling machines and floor grinders," allows a machine fed continuously with water at the cutting surface or one with a "dust collection system recommended by the manufacturer." The collector must "have a filter with 99% or greater efficiency and a filter-cleaning mechanism," and indoors: "use a HEPA-filtered vacuum to remove loose dust in between passes." OSHA defines a HEPA filter as "at least 99.97 percent efficient in removing mono-dispersed particles of 0.3 micrometers in diameter." Paragraph (f) bars dry sweeping or brushing where it could add to exposure, unless safer methods are not feasible, and paragraph (c)(2) asks for exhaust indoors as needed "to minimize the accumulation of visible airborne dust." Every grinder we run carries the collector Table 1 names, and indoors a HEPA vacuum follows each pass.
Polish, grind and seal, coat, or resurface first
The choice is whether the concrete becomes the floor or something goes over it. The line is film: the Council defines a film-forming coating by "a minimal film thickness of greater than 0.05 mils," while a polish's gloss "is generated from the concrete's flat surface profile" (Concrete Decor). Prices are national.
Polish to a Council gloss level
The slab is ground, densified and refined to Level 2, 3 or 4 on the Council's chart. HomeGuide's February 2026 survey prices medium gloss at $5 to $10 and high gloss at $6 to $15 per square foot. Wet results "significantly exceeded the required DCOF of 0.42, even at very high gloss levels." It suits hard, sound interior slabs in homes, offices, showrooms and shops.
Grind and seal
A light grind and a clear sealer or resin film. Sherwin-Williams lists its "Resuflor Grind and Seal" among systems needing only CSP 1, the smoothest ICRI 310.2R concrete surface profile (Form G-1, revised 02/26), so it is a coating, not a polish. Angi's July 2026 page lists sealed concrete at $0.85 to $1.60 per square foot. It suits a sound slab on a tight budget.
Coat it with epoxy or flake
A resin system puts a colored film over the slab. Angi's July 2026 comparison puts epoxy at $2,000 to $4,500, average $2,500, against $400 to $32,000, average $4,500, for a polish. Sherwin-Williams says "In general, the thicker the system, the better the chemical resistance." It suits shops and garages where oil, fuel and chemicals reach the floor; see commercial epoxy flooring.
Resurface first, then polish
A polishable topping gives a new surface over a slab too worn or patched to polish. CTS requires at least 3/8 inch of Rapid Set TRU Self-Leveling for polished flooring and says it "may be polished wet or dry after 24 hours at normal conditions," though "Reflective cracks may appear" over existing joints and cracks. Our page on concrete resurfacing covers toppings.
Whichever finish you choose, a gloss figure should name its instrument. The Council's chart says values must "be measured before any post-polished surface treatments are added," with an "Image Clarity Meter (ASTM D5767)," so a Level 3 floor is Level 3 in the concrete, not in the guard.
Polished Concrete Floors FAQs
How much does polished concrete cost per square foot?
HomeAdvisor's June 2026 national page puts it at $2 to $16 per square foot, and no survey prices Austin. Angi's April 2026 page gives $3 to $12, and HomeGuide's February 2026 rows start at $3 and climb with gloss. Small floors cost more per foot, and repairs and flooring removal are extra.
Can old or damaged concrete be polished?
Often it can, if the slab is hard and sound; a Wolverine Coatings bulletin says "Surface deterioration is not necessarily an indicator of structurally unsound concrete." ACI 310.1-20 calls for Mohs hardness greater than 4 at the surface, and for a soft surface the Council's Position Statement #7 lists densifying among the fixes. A slab too far gone can take a polishable topping at least 3/8 inch thick, per the CTS and Euclid sheets.
Is polished concrete good for a garage floor?
It can be, on a hard, sound slab, with two cautions. Angi's April 2026 page prices garage polishing at $3 to $8 per square foot, national. PROSOCO says acids can still etch a densified slab, and the guard matters: Euclid's Bulletin CP-22 says "Most discoloration from plasticizer migration occurs on acrylic or styrene/acrylic cure & seals," plasticizers being softeners that hot tires release. Compare a coating in our guide to epoxy garage floor pros and cons.
Is polished concrete cheaper than epoxy?
Not on the survey averages: Angi's July 2026 comparison puts polished floors at $400 to $32,000, average $4,500, and epoxy at $2,000 to $4,500, average $2,500, both national. Per square foot the ranges overlap: HomeGuide's February 2026 surveys give $3 to $12 for basic polished finishes and $4 to $10 for installed epoxy. A polish needs a hard surface; a coating needs grinding, crack repair and a moisture test first.
How long does polished concrete last?
The only life figures in our sources are survey wording, not test results. Angi's July 2026 comparison gives "Up to 50 years (well-maintained)" for a polished floor against "Up to 20 years (well-maintained)" for epoxy, and HomeAdvisor's June 2026 page says polished floors "last 20 years or more." Grit wears a polish down: the 2009 Concrete International article says "Dirt and grime can dull a polished floor quickly by abrading the surface."