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Floor & Deck Coatings costs in Maryland
What garage floor coating costs in Maryland
Two-car garage, basement floor, deck and balcony. Plus the reason almost every failed coating in this state failed for the same single reason.
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Quick answer
How much does floor & deck coatings cost in Maryland?
Garage floor coating in Maryland typically costs $5 to $9 per square foot, putting a standard two-car garage of about 500 square feet at $2,300 to $4,500. Deck and balcony waterproofing runs $6 to $22 per square foot. Surface preparation — diamond grinding or shot blasting rather than acid etching — is what determines whether a coating lasts a decade or peels in its second winter.
The numbers
Maryland pricing, broken down.
Almost no contractor site in this market publishes a number, which is exactly why the question has so much search demand and so little honest supply. These are the ranges we price to in Maryland, with the reason each one is a range and not a price.
Typical in Maryland
Two-car garage (approx. 500 sq ft)
$2,300 – $4,500
Garage floor, epoxy or polyaspartic
$5 – $9 per square foot
Includes mechanical prep, crack and joint repair, base coat, flake broadcast and topcoat. Prep is the majority of the labour.
Two-car garage (approx. 500 sq ft)
$2,300 – $4,500
The number most people are looking for. The spread is prep condition and system choice, not garage size.
One-car garage (approx. 250 sq ft)
$1,400 – $2,600
Prices higher per foot — mobilisation, grinder set-up and material minimums are close to fixed.
Three-car garage (approx. 750 sq ft)
$3,200 – $6,200
The best value per square foot of the three, for the same fixed-cost reason.
Basement floor coating
$4 – $8 per square foot
Slightly below a garage — no vehicle traffic, no hot tyres. Moisture testing beforehand matters more here than anywhere.
Deck or balcony waterproofing
$6 – $22 per square foot
A genuinely wide range because it covers everything from a coating over sound plywood to a full traffic-bearing membrane system over living space.
Typical 200–300 sq ft deck
$1,800 – $4,000
Assumes the substrate is sound. Any rot found underneath is a carpentry job first and is not in this number.
Removing an existing failed coating
$2 – $5 per square foot
Grinding off a peeling coating is slow and dusty. It is also non-negotiable — nothing bonds reliably to a failing coat.
Crack and joint repair before coating
$8 – $25 per linear foot
Cracks are routed out and filled with a flexible polyurea, not skimmed over. Control joints get treated so they can still move.
Concrete moisture testing
$150 – $400
Cheap insurance. A slab with no vapour barrier under it pushes moisture up through the coating and delaminates it from below.
Full-chip / high-flake finish upgrade
+$1 – $2 per square foot
Denser flake broadcast, more topcoat to bury it. Hides slab imperfection well and adds real slip resistance.
Metallic or quartz decorative system
$9 – $16 per square foot
A different product class. Beautiful, and more sensitive to substrate and application conditions than a flake floor.
Ranges, not quotes. Published 2026 and reviewed against work we are actually pricing in Maryland. What your job costs comes from a walkthrough — access, condition, height and finish level move a price more than square footage does. Estimates are free and in writing.
Why coatings peel, and why it is almost never the coating
When a garage floor coating fails, it comes up in sheets, usually starting where the car parks or just inside the door. It looks like the product failed. In our experience it is one of three things, and none of them are the resin.
First: the concrete was not mechanically profiled. A garage slab is power-trowelled to a dense, closed surface, and a coating applied over that is sitting on it rather than in it. Grinding or shot blasting is the fix, and it is most of the labour cost in a proper job.
Second: moisture from below. No vapour barrier under the slab, water in the ground, hydrostatic pressure pushing up. The coating is fine; it is being levered off from underneath. Testing first is the only defence.
Third: hot tyre pickup. A car driven on a hot summer day parks on a coating that has not fully cured or was never rated for it, and the tyre lifts a disc of it off as it cools and grips. Adequate cure time before the car returns — usually a few days, not a few hours — prevents this, and it is why the fastest job is not always the best one.
What a DIY kit actually costs you
A big-box epoxy kit for a two-car garage runs a few hundred dollars against $2,300 to $4,500 professionally, and that gap is large enough to take seriously. It is worth understanding exactly what the difference is.
Kits are typically a thinner-build, water-based epoxy relying on acid etching for adhesion, with a light flake broadcast and one topcoat. The resulting film is a fraction of the thickness of a professional system. On a garage that is used lightly, kept dry and never sees a hot tyre, they can look good for a few years.
The failure mode is what makes them expensive. Removing a peeling coating costs $2 to $5 a square foot before a proper system can go down — so a failed DIY floor adds $1,000 to $2,500 to the professional job that follows it. The saving is real if it holds and expensive if it does not.
The honest recommendation: if you are going to DIY, rent a grinder rather than relying on the acid in the box. That single change addresses the most common failure cause, and it is the difference between a kit that lasts and one that does not.
Before you sign anything
What a real written quote should itemise
Ask every contractor for these in writing. Quotes only compare once they do — and Maryland law requires home improvement work over $500 to be under a written contract anyway.
- Preparation method, named: diamond grinding, shot blasting or etching
- Whether a moisture test is being done, and what happens if it fails
- Crack and joint treatment, priced per linear foot
- The system: base coat product, flake, topcoat, and total mil thickness
- Cure time before foot traffic and before the car returns
- Whether the coating runs up a cove at the walls, or stops at the edge
- Slip resistance, particularly if the garage door faces weather
- Warranty terms, and specifically whether they cover delamination
Want the number for your house?
Call and describe the job. You’ll get a straight answer on whether it’s something we do and roughly what it runs, before anyone books a visit.
(301) 524-1729
Priced by us, not a calculator
Floor, Deck & Balcony Coatings
What moves the number
Why two quotes on the same job land far apart.
Usually not because one contractor is expensive. Usually because they are pricing different work. These are the variables that actually move it.
01
Surface preparation method
The single most important variable, and the one that separates a $2,300 garage from a $4,500 one. Diamond grinding or shot blasting opens the concrete pores mechanically so the coating keys into the slab. Acid etching does not achieve the same profile on a power-trowelled garage slab, and a big-box DIY kit relies on it. Ask which method is being used — the answer predicts the outcome better than the brand of resin.
02
The condition of the slab
Cracks routed and filled, spalled areas patched, oil stains degreased and, if they are deep, ground out. Old sealer removed entirely. A slab in poor condition can add several hundred dollars of prep, and skipping it means coating over a problem that will telegraph through within a year.
03
Moisture in the concrete
Maryland has a lot of slabs poured without a vapour barrier under them, particularly in basements and older garages. Ground moisture rises through the slab and pushes a coating off from underneath — the coating fails and the coating was never the problem. A moisture test costs $150 to $400 and, where it comes back high, changes the specification to a moisture-tolerant primer.
04
Epoxy or polyaspartic
Epoxy is the thicker, cheaper, slower-curing base layer with excellent adhesion. Polyaspartic cures in hours, tolerates a wider temperature range and does not amber in UV. Most good systems use both — an epoxy base for the bond, a polyaspartic topcoat for the wear and the UV. A pure polyaspartic system costs more and can go down in a single day.
05
The time of year
Genuinely a Maryland factor. Epoxy needs the slab above roughly 50°F to cure properly and hates high humidity during cure. An unheated garage in January is a bad place for an epoxy base coat, which is why polyaspartic systems — with a much wider application window — are more commonly specified for winter work here, at higher cost.
On the job
What you are paying for.
Trade photography, stage by stage — the work these numbers buy. Photos of our own recent jobs come out at the walkthrough, on the actual house.
Straight answers
Floor & Deck Coatings cost questions
Not covered here? Call and ask — you’ll get a real answer, not a “depends on the job”.
Typically $2,300 to $4,500 for a professionally installed flake system, which works out at $5 to $9 per square foot. If an old coating has to be ground off first, add $2 to $5 per square foot for that. The spread within the range is almost entirely about the condition of the slab and how it is prepared.
Most good systems use both: an epoxy base coat for adhesion and build, a polyaspartic topcoat for abrasion resistance and because it will not yellow in UV. A full polyaspartic system costs more but cures in hours rather than days, which matters if you need the garage back quickly or if the work is happening in a Maryland winter when an epoxy base will not cure reliably.
A professionally installed, properly prepared system should give ten to fifteen years in a residential garage, and the topcoat can be refreshed rather than the whole floor replaced. A coating over unprepared or moisture-affected concrete can fail within two winters. The preparation, not the product, is what the lifespan tracks.
That is one of the main reasons to coat it in this region. Maryland roads are heavily salted, cars carry brine into the garage all winter, and the chlorides work into bare concrete and cause surface spalling. A properly bonded coating is a barrier against exactly that — it is genuinely more useful here than in a mild climate.
Yes, but the system has to suit the conditions. Standard epoxy wants the slab above about 50°F and does not cure well in high humidity, so an unheated Maryland garage in January is not a good candidate. Polyaspartic systems apply and cure across a much wider temperature range, which is why winter work here is usually specified that way — at a higher price, honestly stated up front.
Talk to the people doing the work
Get a straight number for the whole job.
Tell us what needs doing. We’ll walk it with you, sequence every trade it touches, put the price in writing, and leave you to decide.
Get a quote
Let’s price your project.
Two short steps. No obligation, no pressure — just a clear number and a straight answer about what the job involves.
Tick as many as you like. Most jobs are two or three of them at once, and I sort out the detail when I come and look. Nobody gets turned away for choosing the wrong box.
