Garage Floor Coating Installation Guide for Metro Detroit (2026) | Elite Epoxy Design

Our diagnostic is a structured site record—not a walk-through comment. Crew leads capture slab age, previous coatings, drainage grade at the apron, overhead door seal condition, and maintenance history (snow melt, hydraulic leaks, pressure washing frequency). Photographs cover every wall line, apron approach, crack map, and stain footprint. Moisture kits are placed per Section 2 before any profile work begins so we do not destroy test validity by grinding first.

We mark areas that will trigger Petroleum Extraction Protocol, flood coat, or Elite MB-2 on the slab sketch. Homeowners receive a plain-language summary tied to the tier recommendation (Section 5). If diagnostic findings change after strip grind—as when failed epoxy removal reveals hidden pitting—scope is revised before primer, not after complaint.

This intake is how we defend warranty claims and how case studies are built later. Written proposals include client name, project address, and square footage on every quote.

After profiling, repairs, moisture mitigation, and extraction are complete and verified, coating follows a fixed sequence: (1) HEPA vacuum and tack cloth wipe, (2) primer or Elite MB barrier per specification, (3) base coat or build coat at manufacturer spread rate, (4) optional flake or metallic broadcast, (5) traction grit if specified, (6) polyaspartic topcoat, (7) cure lock-out with documented return-to-service time.

Recoat windows are tracked by clock and substrate temperature—never by guess. Humidity spikes in Michigan summers can compress working time; winter installs may require hot-kit adjustments within manufacturer limits. Each coat is inspected for pinholes, fisheyes, and dry spray before recoat; fisheyes on primer trigger contamination investigation, not quick topcoat cover.

Return-to-service ranges from same-day foot traffic on select polyaspartic builds to 24–72 hours for full chemical resistance. Tire traffic before full cure causes hot-tire pickup and permanent ghosting—homeowners receive written cure instructions at project close.

Elite Epoxy's Petroleum Extraction Protocol is a capillary-draw remediation sequence used when hydrocarbons have penetrated below the immediate surface of the concrete. Standard diamond grinding removes the top paste layer and can make a slab look clean while leaving petroleum locked in the pore network. When coating is applied over that condition, interfacial contamination blocks primer penetration and osmotic blistering appears within months—often misdiagnosed as "bad epoxy" when the failure is actually unresolved oil.

The protocol uses a drawing compound applied to the prepared slab, allowed to cure under controlled dwell time, then removed with mechanical extraction. Only after removal do we perform the profile grind that creates the mechanical anchor for Elite primer systems. The compound works by preferential absorption—pulling hydrocarbons toward the surface where they can be collected—rather than merely masking odor or staining. Crews repeat the extraction footprint when bleed-back reappears; a second extraction cycle is cheaper than a full recoat after delamination.

Surface staining without deep saturation may be addressed with aggressive profiling and targeted degreasing. Deep saturation—identified by dark halos after initial grind, oil bleed-back within 24 hours, or patchy moisture readings adjacent to stain zones—requires full Petroleum Extraction Protocol before coating. Field crews document stain footprint, vehicle maintenance history, and prior spill locations on every residential intake form. Homeowners performing their own maintenance should disclose hydraulic jack fluid, brake clean runoff, and classic vehicle weeps—these drive extraction scope more than visual stain size.

Latex paint, old sealers, and polyurethane joint caulk are bond breakers. They must be removed—not encapsulated—before Elite systems are applied. Our crews use 36-grit aggressive grinding on paint and coating removal passes because 16-grit production grinding is optimized for profiling clean concrete, not for stripping tenacious films.

Control joints are cut and caulked to allow slab movement. Coating over rigid caulk without extraction transfers movement stress into the film, producing tears at the joint line. We mechanically extract existing caulk, vacuum joints, and re-fill with semi-rigid polyurea joint filler only after the coating build is specified—never before the flood/repair phase on compromised slabs.

The sequence on a typical residential garage: (1) soft-cut or scrape bulk caulk, (2) 36-grit removal grind on painted areas, (3) profile grind per Section 3, (4) joint cleaning, (5) repairs, (6) second profile pass if flood coat used, (7) primer. Painted curbs and stem walls are addressed with hand grinders per the vertical surface protocol.

We measure moisture vapor emission before profile grinding (baseline) and after the final profile pass (final reading). Baseline tells us whether the slab is actively driving vapor before we open pores; final reading tells us what the coating system must tolerate after profiling increases surface area. Slabs that read high before grind and drop after profiling still receive barrier specification if the final reading exceeds threshold—profiling does not "fix" vapor drive, it only reveals it honestly.

Test layout follows ASTM F1869 calcium chloride principles for MVER reporting in pounds per 1,000 square feet per 24 hours, and we reference ASTM F2170 in-situ relative humidity when slabs are new, rain-exposed, or when chloride kits show borderline results. ASTM F3010-24 frames how membrane-forming mitigation systems must be installed when results exceed our internal threshold. ACI 302.2R reminds specifiers that slab age, curing, and subsurface vapor retarders influence readings—our intake form captures pour date and whether a polyethylene vapor retarder was confirmed under the slab (many older Michigan garages lack one).

Minimum five test locations per residential bay. Slabs larger than 600 square feet receive eight or more kits, with additional kits at perimeter walls, apron transitions, and low corners where vapor drive concentrates. The highest single reading governs specification—not the average—because one wet zone can delaminate an entire system. Results are photographed, labeled on a slab sketch, and stored in the project file for warranty and case study documentation.

Elite Epoxy uses 4.0 pounds per 1,000 square feet per 24 hours as the default MVER ceiling for direct bond to prepared concrete on residential garage work. This aligns with common manufacturer warranties for high-solids primer systems when applied at specified spread rate and film thickness.

Below 4.0 lbs, vapor drive is manageable for a properly formulated polyurea-polyaspartic build with documented primer. At or above 4.0 lbs, we require a membrane-forming moisture mitigation layer—either Elite MB-1 for perimeter-concentrated drive or Elite MB-2 for whole-slab conditions. Manufacturer data sheets may specify a lower ceiling for specific products—those limits govern on the signed scope.

Threshold decisions are recorded on the project diagnostic sheet alongside slab age, vapor barrier under-slab history, and drainage grade. We do not approve coating when active water intrusion, failed perimeter drains, or green concrete (<28 days) is present regardless of kit readings.

Elite MB-1 is our standard moisture barrier primer for perimeter-concentrated vapor drive—typical of garages where exterior walls and apron approaches read elevated but the slab center reads below threshold. It is applied in a documented band along walls and transitions, then tied into the field primer system.

Elite MB-2 is our high-performance, full-slab moisture mitigation membrane for slabs with whole-field readings at or above 4.0 lbs, basement-grade pours, or documented vapor barrier failures below the slab. Elite MB-2 is specified with the Elite Moisture-Shield coating tier so topcoats and broadcast schedules match the slower profile of a mitigated slab.

Both systems require CSP-compliant profiling, documented spread rate, and recoat windows per manufacturer data. We never thin barriers to stretch coverage—film thickness is verified by wet-mil gauge spot checks.

Pass 1 is the profile grind: remove laitance, open pores, and establish Concrete Surface Profile (CSP) per ICRI 310.2R-2013—typically CSP 2 on residential garages. Pass 2 is the leveling grind after repairs cure: knock down trowel marks from flood coats, feather repair transitions, and unify gloss before primer.

We HEPA-vacuum between passes. Dust left on the slab acts as a bond breaker indistinguishable from delamination in the first month. A single pass suffices only on sound, unrepaired slabs with no flood coat and no paint removal beyond light profiling—common on new construction when laitance is the only enemy.

Pass 1 uses aggressive diamonds; Pass 2 uses finer bonds to refine texture without removing the repair plane we just built.

Fresh pours look smooth and “ready,” but trowel finish leaves a weak laitance layer and curing compounds that block adhesion. Elite Epoxy grinds new concrete to CSP 2 even when no cracks are present because the failure mode is interfacial—coating sticks to laitance, laitance sticks to nothing.

ICRI 310.2R defines CSP as the measure of surface roughness. Garage coatings need mechanical anchor, not chemical hope. We verify cure age (typically ≥28 days), MVT, and RH before grinding. No repair phase is scheduled unless impact damage or curl-related cracks are found during inspection.

New construction intakes still include Petroleum Extraction screening—construction equipment leaks happen on “clean” slabs too.

Floor-to-wall continuity matters on show garages and commercial bays. Hand-held angle grinders with diamond cup wheels profile poured concrete curbs and stem walls—equipment that does not translate to horizontal production grinders.

Masonry block walls require a dedicated block primer because open cell structure drinks resin unevenly, producing pinholes and adhesion starvation on high-absorption cells. Poured concrete walls may accept the same primer as the field when CSP and porosity match.

Linear-foot scope is documented on proposals: 40–60 LF typical on three-car garages with stem walls. Wooden steps are handled under Section 6—no grinding on wood.

A flood coat is a low-viscosity, cementitious or polymer-modified repair compound spread across the entire slab to fill micro-voids, bug holes, and surface honeycombing. We use it when more than 50% of the field shows interconnected pinholes or when a failed epoxy strip reveals widespread paste loss.

Spot repair is reserved for isolated spalls and defects under 30% of slab area. Flood coats add a cure window and always require Pass 2 leveling grind before primer. Attempting to prime over uncured flood valleys traps solvent and softens the film.

Material selection follows manufacturer TDS for minimum thickness and maximum per-coat depth. We do not flood to “level” structurally low slabs—that is concrete raising, not coating prep.

Cracks wider than 2 mm with vertical displacement are moving joints. We route them clean and fill with flexible polyurea joint filler that accommodates cyclic movement without transferring stress to the coating film.

Hairline and non-moving control cracks under 2 mm receive penetrating repair primer routed into the crack volume, then are overlaid by the coating system. Both methods may appear on one slab: saw-cut control joints at the apron, static shrink cracks mid-field.

We never coat over foam backer rod or compressed polyurethane caulk. Joints must be extracted and prepared per Section 1 before crack logic applies.

Pitting from freeze-thaw and road salt (see Section 5) ranges from isolated pop-outs to widespread scaling. Targeted trowel repair works when pitting affects less than 30% of the field and depth is shallow after grind. Full-slab flooding addresses pervasive pit networks common on unprotected Michigan slabs older than 15 years.

Any flood-level repair triggers Pass 2 leveling grind. Targeted repairs on otherwise sound slabs may proceed with a single profile pass if transitions feather smoothly under straightedge check.

We photograph pit density before repair for case study documentation and warranty files.

Partial stripping leaves swirls of weak intercoat adhesion. Water vapor and hydrocarbons travel laterally under remaining epoxy islands, then push the new system off in sheets. Elite Epoxy requires full removal to bare concrete on any failed or unknown prior epoxy—mechanical grind and strip until uniform aggregate exposure.

Removal reveals hidden damage: pitting, cracks, and contamination that were invisible under the old gloss. This is when scope upgrades from Elite Standard to Elite Pro+ occur—before coating, not after callback.

Timeline when coating over failing epoxy without removal: 1–3 years in freeze/salt climates, often one winter. The new topcoat may look acceptable while the old interface shears under tire load.

Michigan garages see compounding damage: water enters pores and cracks, expands approximately 9% on freeze, and thaws with hygroscopic road salt accelerating further saturation. FHWA-HRT-06-117 and peer-reviewed freeze-thaw literature (including MDPI Buildings 2022 reviews) document how this cycle scales paste and exposes aggregate.

Visible patterns: pitting, surface scaling, D-cracking near joints, white efflorescence, and oil-stain halos where salt-rich brine mixed with hydrocarbons. On unprotected slabs, meaningful degradation often appears within 10–20 years—earlier on aprons with direct salt tracking.

Elite systems interrupt the cycle by sealing the wear surface, but they cannot resurrect structurally failed concrete. Severely scaled slabs may require concrete repair before Elite Pro+ coating.

Elite Standard through Elite Moisture-Shield are proprietary scope bundles—not marketing labels. Each tier ties prep depth, barrier selection, and topcoat build to diagnostic findings documented on site. Tier selection is finalized after MVT, oil screening, and repair mapping—never from square footage alone.

Use the selection-logic table below with the tier cards. When two tiers appear valid, specify the higher tier and document why—under-specification is how competitors win bids and lose referrals.

Traction grit is broadcast into the wet topcoat to create a controlled micro-roughness. Elite Epoxy stocks 16-mesh (standard residential), 24-mesh (moderate—wet conditions, snow melt tracking), and 36-mesh (maximum—sloped aprons, elderly residents, heavy wet exposure).

Grit is not a substitute for profile or moisture mitigation. It is the last line of defense against slip. Over-building grit on a decorative metallic bay can dull clarity—match grit to use case, not fear.

Decision tree starts with moisture exposure, apron slope, and household mobility needs, then narrows flake density (next question).

Partial broadcast leaves portions of the base coat visible—lighter visual weight, faster install, excellent for garages where owners want subtle texture. Full broadcast covers the base coat edge-to-edge with vinyl flake, producing deeper uniform color and maximum hide of minor defects.

Partial suits modern gray blends on clean slabs; full suits high-traffic households, aggressive hide requirements, and color-saturated designs. See our Colors page for flake blend options. Flake color blends are documented by name on every proposal.

Both densities receive the same clear topcoat build unless metallic systems are specified separately.

Wood does not receive diamond grinding. Crews abrade manually with 80–120 grit to remove gloss, defibrillate, and open grain. Prior paint must be stripped to bare wood—coating over chalking paint on steps fails at the first freeze.

The same flake blend and grit level as the adjacent slab are specified for visual continuity. Steps are primed with wood-compatible primer systems per manufacturer TDS, then receive matching broadcast and topcoat.

Document step count and tread square footage separately on quotes.

Concrete masonry unit (CMU) block has open cells and variable absorption. Field primer meant for profiled poured concrete can starve high cells and float on low cells, producing pinholes and soft adhesion. Elite block primer is formulated to saturate cells and establish uniform film thickness before topcoat.

Poured concrete walls may not need block primer when porosity matches the slab after hand grind. CMU always gets block primer—no exceptions on warranty-backed work.