Epoxy flooring services
Basement Floor Epoxy in Huntington, NY
Free quotes for basement floor epoxy in Huntington, NY.
Basement floor epoxy is a two-part resin coating on a concrete slab that sits below grade, and in Huntington the moisture in that slab decides whether the floor can be coated and with which system. Stonhard, a resin floor maker, writes that "the ground beneath a concrete slab is almost always damp with a relative humidity of 100%" and that with slabs "over 25 years old, there is a risk that a moisture barrier was not installed"; the Census Bureau's 2020-2024 American Community Survey puts the Town of Huntington's median year built at 1963. So we test the slab before we choose a system. A basement floor coating is a finish, not a remedy for a wet basement: Rust-Oleum's technical data for its own basement kit (ESH-08, Rev. 032624) states "This is not a waterproofing product."
Typical published range
$1,200 to $20,000 for a 300 to 2,000 sq ft basement, national (HomeGuide, Feb 2026); $4 to $10 per sq ft installed
HomeGuide's February 2026 epoxy flooring survey, a national one, prints $1,200 to $20,000 for an epoxy basement floor of 300 to 2,000 square feet, at $4 to $10 per square foot installed. Fixr's January 2025 concrete floor coating page, also national, splits the job by material on a basement of about 1,000 square feet: $2 to $4 per square foot with concrete paint and $10 to $15 with a thick-coat epoxy. Two national pages print moisture work as a separate line: HomeGuide's November 2024 concrete coating page gives about $50 to $300 for moisture testing, and Angi's April 2026 concrete polishing data gives $2 to $6 per square foot for moisture mitigation treatments. No survey publishes a Huntington, Suffolk County or Long Island price, and none of these is our price; our epoxy flooring cost page holds the full tables.
What sets a basement system apart is its first coat. Where the slab reads above the coating's limit, that coat is a moisture-mitigating epoxy primer: a 100% solids epoxy, with no water or solvent to evaporate, made to reduce the vapor a slab gives off. Sherwin-Williams' data sheet for Resuprime MVB, revised August 7, 2025, rates its 12-mil system up to 85% relative humidity and its 17-mil system up to 100%, on concrete at least 28 days old, under ASTM F2170, the test that reads humidity with probes set in the slab; a mil is a thousandth of an inch. Dur-A-Flex's data sheet for Dur-A-Glaze MVP Primer gives 16 mils at 100 square feet per gallon. For scale, Rust-Oleum's data for its consumer basement kit (ESH-08) gives 3.0 to 3.5 mils dry per coat. The color coats go on over the primer.
We test the slab for moisture before we choose a system. On a basement floor that means ASTM F2170, the probe test, or ASTM F1869, the calcium chloride test, because coating data sheets set their limits by those tests. We grind the slab with diamond tooling instead of acid etching it; Wagner Meters, a probe maker, lists "Avoid acid etching as surface preparation for a coating application" among its steps for preventing blisters in resin floors. A basement is an enclosed room, so our grinders run with the dust collection that the federal OSHA silica rule (29 CFR 1926.1153, Table 1) names, and a HEPA-filtered vacuum between passes. We repair cracks and holes before the primer and say which cracks will still show.
Dew point decides the day. Sika's data sheet for its Sikafloor-264 epoxy (September 2026) requires a substrate at least 5 degrees F above the dew point, the temperature at which moisture condenses, and University of Minnesota Extension notes that warm, humid outside air "will condense on the cool basement wall and floor surfaces". NOAA's 2006-2020 hourly normals for Farmingdale Airport, outside the Town, give a normal dew point of 65.8 degrees F at 7 a.m. standard time in mid-July; that is outdoor air, so we measure the air, the slab and the dew point before we mix. The Sika sheet gives foot traffic at about 12 hours at 68 degrees F, and we give you your floor's times in writing. We work inside the Town of Huntington's weekday hours for building work (Town Code section 141-4); our epoxy floor installation page sets out the job day by day.
A written quote for a basement starts with what you can tell us: the size of the floor, the age of the house, what is on the slab now, whether water has come in and where, and photographs of the cracks and of any white powder. We then visit, measure and test the slab before we send a free written quote. Our written contract gives the start and completion dates and the cost of labor and materials, as Suffolk County Code section 563-21 requires, and names the coating products, as New York's General Business Law section 771 requires.
What a basement slab shows before it is tested
An epoxy basement floor suits a sound slab whose moisture reading is inside the coating's limit, or inside the rating of a moisture-mitigating primer under it. Each condition below can be seen without a meter, and each is a reason to test before any basement flooring goes down.
- White powder at the foot of a wall or along a crack: Euclid Chemical's Technical Bulletin CP-30 defines efflorescence as free salts that water migrating through concrete deposits on the surface.
- Concrete that has darkened under a plastic sheet taped down for 24 hours: Rust-Oleum's basement kit data (ESH-08) states "The concrete substrate will be darker if damp."
- An old floor paint or kit coating with raised bubbles, dull patches or hollow-sounding areas, which Sherwin-Williams' technical article on blistering lists as early signs of blistering or disbondment, the separation of a coating from the concrete.
- Water on the floor after rain: University of Minnesota Extension's recommended approach, after removing interior moisture sources, is "to evaluate the gutters, downspouts and surface grading".
A slab that is pitted, scaled or widely cracked is repaired or resurfaced before any coating: HomeGuide's February 2026 concrete resurfacing page, a national one, prints $3 to $7 per square foot for resurfacing a basement floor slab, and our concrete resurfacing page covers the repair materials.
The three moisture tests and the limits data sheets set
Three ASTM methods are used on a basement slab, and only two of them return a number that a data sheet can set a limit by. ASTM F1869, the calcium chloride test, gives the moisture vapor emission rate in pounds of moisture over 1,000 square feet in 24 hours; KTA-Tator, a coatings inspection firm, describes calcium chloride left under a sealed dome for 60-72 hours. Sherwin-Williams' surface preparation guideline, Form G-1 (revised 02/26), sets "not more than 3 pounds of moisture per 1,000 square feet per 24 hours". ASTM F2170 reads relative humidity inside the slab with probes set in test holes; Wagner Meters gives 24 hours before a documentable reading.
By that test Form G-1 accepts 80% or lower under non-permeable flooring, Sika's Sikafloor-264 data sheet sets 85% and Simiron's Polyaspartic HS data sheet sets 75%. ASTM D4263, the plastic sheet method, "is used to indicate the presence of capillary moisture in concrete": KTA-Tator describes 4 mil or thicker polyethylene, at least 18x18 in., taped down for a minimum of 16 hours. Form G-1 says this method "will not quantify the amount of moisture movement". The F1869 result is a snapshot: the standard states that its rate "only reflects the condition of the concrete floor at the time of the test".
Under the slab: vapor retarders, older houses and groundwater
Two things under a Huntington basement slab cannot be seen from above: the vapor retarder, a plastic sheet laid under the slab, and the groundwater. New York's Department of State code-training handbook (version 8/10/2026) summarizes Section R506.3.3 of the 2025 Residential Code of New York State, "Vapor retarder", as "6 mil poly or approved alternate"; that is the handbook's summary line, not the code's full text. Stonhard puts the risk that no moisture barrier was installed at slabs over 25 years old; the Census Bureau's 2020-2024 American Community Survey estimates that 9.6 percent of the Town of Huntington's housing units were built in 2000 or later, and our Huntington floor coating data page has the table by decade. On groundwater, Suffolk County's hazard mitigation plan (2020) says shallow groundwater flooding, whose impacts include "groundwater seepage into basements", typically occurs "in low-lying areas along the coast, near surface water bodies", and ranks that hazard "Low" for the Town.
The same plan ranks flood "High" and names East Shore Road and Huntington Bay for recurring flooding. The flood maps the Town uses, effective September 25, 2009, are on file at Town Hall, 100 Main Street (Town Code section 168-7). No source we have read gives one depth to groundwater for the Town, so we give none.
Blisters, peeling and white powder: what moisture does to a coating
Vapor that reaches the underside of a coating it cannot pass through builds pressure there, and the coating can blister or peel. Sika's knowledge base page on hydrostatic pressure and moisture vapor states that moisture migrating through a slab becomes a problem "when it becomes trapped beneath an impermeable film sitting on the surface, at which point the build-up of pressure can be sufficient to blow sections off or cause other forms of damage like blisters".
Osmotic blistering is a second mechanism: KTA-Tator defines osmosis as moisture "transferred through a semi-permeable membrane" and reports pressures that "can reach high levels (reportedly exceeding 15,000 psi)", and Dur-A-Flex's data sheet says its mitigation primer "will not prevent floor failures caused by osmotic blistering unless ionic components (salts) in the substrate are at acceptable levels". Efflorescence, the white powder, is left by the same migrating water: Euclid Chemical's Technical Bulletin CP-30 states that "Only 0.2 ounces of calcium carbonate per square yard of surface is needed to cause a significant shift in color." For a failed floor, Sherwin-Williams' article on blistering states that "Larger failures often require removing the entire coating, performing moisture testing and reapplying the system with a compatible primer or vapor control layer."
The choice on a basement floor: coat, prime first, use a kit or wait
The moisture reading decides between the first two options, and water coming in rules out every option but the last. No reading is final: Simiron's Polyaspartic HS data sheet (04/01/2026) warns that "seasonal variations in ground moisture can cause excessive moisture vapor transmission (MVT) regardless of results measured prior to coating application".
Epoxy on a slab inside the limit
A ground slab, an epoxy primer and pigmented epoxy coats, in a solid color, a flake broadcast or a metallic finish, which our metallic epoxy floors page covers. Sherwin-Williams' technical article on blistering states "Standard epoxy systems are not moisture-tolerant", and Stonhard writes that its liquid-rich systems "require a moisture mitigation system when readings are above 80% relative humidity". It suits a dry, sound slab.
A mitigation primer under the system
The same floor over a moisture-mitigating epoxy primer. Sherwin-Williams' Resuprime MVB data sheet states two limits: "Do not apply over a slab while experiencing hydraulic pressure" and "Functioning vapor barrier is required for use", which matters in an older house. Laticrete's data sheet for NXT Vapor Reduction Coating (DS-507.0-0519) calls it "not a replacement for waterproofing membranes". It suits a slab that reads over the coating's limit and takes in no liquid water.
A consumer kit or floor paint
A water-based two-part kit, or a one-part basement floor paint, rolled on by the owner. Rust-Oleum's technical data ESH-08 states: "If you have periodic damp or wet conditions in your basement, DO NOT USE this product, as the coating will not adhere properly." Behr's page for its one-part floor paint says "DO NOT use on vertical surfaces or areas subject to hydrostatic pressure." It suits a dry slab and light use.
Fix the water first
No coating until the water is dealt with. University of Minnesota Extension calls an interior membrane or coating "a temporary solution" to a basement moisture problem; its approach starts outside, with earth that slopes away from the foundation "a minimum of 1 inch per foot for at least 6 feet". One sealer's sheet sets its own limit on basement floor sealing: Prosoco's data sheet for its penetrating Siloxane PD states "Not recommended for below-grade application." It suits a basement that takes in water.
Makers write their terms for materials: Laticrete's sheet says the company "is not responsible for moisture emission from expansion and isolation joints, existing cracks, or new cracks". Our quote states in writing what is and is not covered, and lists any moisture-mitigating primer as its own line.
Questions
Basement Floor Epoxy FAQs
Can mold grow under epoxy?
Mold needs moisture, and no source we have found tests for mold under an epoxy floor coating, so there is no study to cite either way. The EPA's "A Brief Guide to Mold, Moisture and Your Home" (updated February 18, 2026) says of molds that "none of them will grow without water or moisture". ASTM F2170 lists "microbial growth" among the floor covering system failures that excessive moisture in a slab can cause, and University of Minnesota Extension places basement mold "in damp carpets and beneath wall coverings". That is why the slab is tested before it is coated.
How much does 1000 sq ft of epoxy cost?
At HomeGuide's national rate of $4 to $10 per square foot installed (February 2026 survey), 1,000 square feet works out to $4,000 to $10,000; that is arithmetic, not a total the survey prints. Fixr's January 2025 page, also national, prints $10,000 to $15,000 for thick-coat epoxy on an average basement floor of about 1,000 square feet. Neither figure is a Huntington or Long Island price, and neither is ours.
How much does a 12x12 epoxy floor cost?
A 12x12 room is 144 square feet, and at HomeGuide's national rate of $4 to $10 per square foot (February 2026 survey) that works out to $576 to $1,440. That is arithmetic, not a printed total, and a small room can cost more than it suggests: Bob Vila's national epoxy garage floor page (April 2024) notes that some contractors require a $500 to $1,000 minimum charge.
Do I need a permit to epoxy a basement floor in Huntington?
No Town of Huntington page we have read says whether coating an existing basement floor needs a building permit, and the Town's guideline tells owners to ask. The Building and Housing guideline (revised 9/1/2021) reads "NO BUILDING PERMIT REQUIRED for Roofing, Siding and Window/Door (if replacing in-kind and no structural changes) driveways, slabs, hot tubs and Antennas for home TV. Please contact the Building Department before working on structures." A finished basement does need one: the Town's 311 article "Projects Requiring Permits" lists "Finished Basement", and the guideline says it "Will require Egress Window/Cellar Entry direct to outside." Incorporated villages such as Huntington Bay and Lloyd Harbor issue their own permits.
Does an epoxy floor keep radon out of a basement?
Not by any source we can cite: the U.S. EPA does not recommend sealing alone to reduce radon. Its "A Consumer's Guide to Radon Reduction" gives the reason: "by itself, sealing has not been shown to lower radon levels significantly or consistently." In homes with a basement, the guide says, radon "is usually reduced by one of four types of soil suction". The EPA's action level is 4 pCi/L, and its zone map says "All homes should be tested for radon."
More services