4.9 on Google • 124+ reviews
Garage floor moisture in Prescott: how we test and what we do about it
Prescott slabs can carry water vapor you cannot see, and it will ruin a coating from underneath if nobody checks for it first. We screen every garage floor with a moisture meter before we quote it, run a calcium chloride test when the reading calls for it, and build the coating system to match what the slab actually tests at, whether that is our standard base or a dedicated moisture barrier.
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Grind-First Prep
Moisture in Prescott Slabs
Prescott's Climate Puts Water Under Your Slab
Concrete is not waterproof. Groundwater and moisture in the soil under a slab move upward through the concrete as vapor, a process that never really stops, it just speeds up or slows down with the seasons. Prescott sits at about 5,400 feet with a real winter, real snowmelt, and monsoon rain that soaks into the ground around a lot of garages. That moisture has to go somewhere, and often it is straight up through the slab.
On a bare, uncoated floor, that vapor just evaporates off the surface and you never notice it. Seal that same slab with epoxy and you have blocked the exit. If the vapor coming up is more than the coating system can handle, it builds up underneath, breaks the bond, and shows up later as peeling, bubbling, or a floor that never fully cures. Testing before we coat is how we avoid that, not how we upsell you.
- White, powdery residue sitting on the surface of the concrete
- Dark or blotchy patches that show up and fade, especially after rain
- Damp concrete under boxes, storage bins, or rubber mats you rarely move
Testing, Not Guessing
How We Test Every Slab Before We Coat It
Every estimate includes a moisture check, not just the floors that look suspicious. It takes a few minutes, costs you nothing, and tells us whether your slab is a standard install or needs extra protection before we ever price the job.
Moisture-Meter Screening
A quick, non-invasive reading on every slab we quote, no exceptions. It is the first thing we check, right alongside looking for the white residue, dark patches, and damp spots that tell us something is going on underneath.
Calcium Chloride Testing
If the meter reading or the visible signs point to a problem, we run a calcium chloride test before any coating goes down. It measures how much water vapor is actually moving through your slab, in pounds per 1,000 square feet per day, and takes about three days to get a real result. We are not guessing at a number, we are measuring it.
What Happens Next
The test result tells us which system your floor needs. Most Prescott slabs come in under our standard base rating and need nothing extra. If the number comes back higher, we add a moisture barrier and price it as its own line, so you see exactly what it costs before you decide.
Built for the Reading
The System Depends on What the Test Shows
Same grind-first prep either way. What changes is what goes down between the slab and the topcoat, based on the vapor reading we measured, not a guess.
Standard Epoxy Base
Our everyday install, and what most Prescott garage slabs need. Rated to handle up to 9 pounds of vapor per 1,000 square feet per day, which covers the large majority of the floors we test.
Moisture Barrier
Added when your calcium chloride test comes back above 9 pounds. Rated up to 26 pounds of vapor per 1,000 square feet per day, it goes down before the base coat and stops vapor from reaching the epoxy at all.
A Separate Estimate Line
A moisture barrier is not buried in the price or sprung on you at install. If your slab needs one, it shows up as its own line on your estimate so you know exactly what you are paying for and why, before you sign anything.
Your Warranty, Either Way
Every garage floor we install carries a 10-year warranty covering peeling and chipping, including moisture-related peeling, as long as the system we recommended for your test results is the one that went down.
What We Check During Testing
Moisture meter: A same-visit reading on every slab, included in the estimate.
Calcium chloride test: Run when signs or meter readings call for it, results in about three days.
Slab age and history: Older slabs and floors with a prior sealer can trap or mask vapor.
Site conditions: Grading, downspouts, and irrigation near the garage all affect what is moving under the slab.
What This Means for Your Warranty
Under 9 lb: Standard base, covered under our full 10-year warranty.
Between 9 and 26 lb: Moisture barrier added, warranty stays intact.
Documented upfront: Your test result and system choice are in writing before we start.
Our word on it: If a disclosed, properly tested slab peels from moisture within warranty terms, we fix it free.
Local, Not a Franchise
The Same Crew, From Estimate to Walkthrough
The Only Epoxy Showroom in the Prescott Area
You shouldn’t have to guess what your floor will look like. Compare color blends, flake sizes, and gloss levels before you decide.
10-Year Warranty
Every installation is backed by a 10-year warranty covering chipping and peeling from normal vehicle traffic and wear. If it ever peels, we fix it free of charge.
Professional Prep, Grinding Not Acid Etch
The number one cause of coating failure is bad prep. We grind every surface with commercial diamond grinders and HEPA vacuums so the coating bonds correctly.
2-Day Installation
We fill hairline cracks, profile the slab, and use industrial equipment for a fast turnaround. Most garage floors are finished in about two days.
Our Process
How We Test and Treat Moisture, Step by Step
Same process whether your slab is bone dry or borderline. We just do not skip the testing.
Visual Walkthrough
We look for the three visible signs, white residue, dark patches, and damp spots, and ask about the slab's age and history.
Moisture-Meter Screening
A quick meter reading on every slab we quote, included in your free estimate at no extra charge.
Calcium Chloride Test, If Needed
When the signs or the meter call for it, a three-day test measures vapor in pounds per 1,000 square feet per day.
Build the Right System
Standard base up to 9 lb, or a moisture barrier up to 26 lb, priced as its own line so you see it before you decide.
Financing available. Ask about monthly payment options on approved credit, so a new floor doesn't have to wait for the budget.
The Real Difference
Standard Epoxy Base vs. Moisture Barrier
Most Prescott garage slabs test well within range for our standard epoxy base, no extra step needed. A smaller share test higher, usually slabs with a history of dampness, poor drainage nearby, or no vapor barrier under the original pour.
Either way, the decision is based on your actual test result, not a guess, and the moisture barrier only gets added, and only gets charged, when the number says you need it.
Standard Epoxy Base
Handles up to 9 lb of vapor per 1,000 sq ft per dayIncluded in every standard installThe right fit for most Prescott slabsBacked by our full 10-year warranty
Moisture Barrier System
Handles up to 26 lb of vapor per 1,000 sq ft per dayAdded only when your test calls for itPriced as its own line on the estimateKeeps your 10-year warranty intact
See It Before You Buy It
Pick Your Flake Blend Standing on It
Prescott Epoxy is the only epoxy floor coating company in the area with a physical showroom. Come stand on finished floors, compare blends side by side, and see the real thing instead of a photo on a phone screen.
- Full-size finished floor samples you can walk on
- Every flake blend and color option on display
- Talk directly with the people installing your floor
- No appointment needed, M–F 7AM–5PM
Endless color and finish options: multi-color chip blends, metallic effects, and solid colors, in your preferred gloss level and chip size. Browse color options, quartz epoxy systems, and epoxy pebble finishes.
Prescott Showroom
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You Have Questions, We Have Answers
Garage Floor Moisture FAQs
Look for three things: white powdery residue on the concrete, dark or blotchy patches, and damp concrete under boxes or rubber mats. If you see any of these, tell us before your estimate. It doesn’t mean you can’t coat the floor. It means the system has to be built for it.
Every slab. We start with a moisture meter and look for the signs above. If anything points to high moisture, we run a calcium chloride test before we start. It measures how much water vapor comes through your slab in a day, and it takes about three days to get a result.
Most can still be coated. Our standard epoxy base handles up to 9 pounds of vapor per 1,000 square feet per day. Above that, we add a moisture barrier rated up to 26 pounds. It shows up as a separate line on your estimate, so you see the price before you decide.
Serving Prescott and All of Yavapai County:
Get a Free Garage Floor Moisture Assessment
Call or stop by the showroom at 1030 Sandretto Dr, Suite K, Prescott, AZ 86305. Every estimate includes a moisture check, our grind-first prep, and a 10-year warranty.
Prefer to talk it through?
(928) 800-8154
Monday–Friday, 7AM–5PM. Licensed, bonded, insured. ROC #353243.