Industrial and Warehouse Painting in NJ: How a Repaint Is Specified, Scheduled and Judged

An industrial repaint is decided before anyone opens a pail. The specification names a surface preparation standard for every substrate, a coating for every surface, a dry film thickness for every coat, and the order the building will be handed back in. Get those four right and the job lasts; get the first one wrong and nothing downstream saves it. This guide is the long version of the conversation we have walking a warehouse with a facility manager, looking up at a ceiling deck nobody has touched since the building went up.

We are a family-owned painting company in Morganville and have painted commercial and industrial buildings across Monmouth, Middlesex, Ocean, Mercer, Somerset and Burlington counties, plus Union, Essex, Hudson, Bergen and Passaic in North Jersey, for more than 20 years, using Benjamin Moore and Sherwin-Williams products. This article is about how the work is specified and planned rather than what it costs: every standard, rule and product figure below is quoted from its own published document, and each one was fetched and read on 22 October 2026. There is no price anywhere in it. For the cost side, see our guide to commercial painting cost in NJ and the commercial section of our cost guide.

Two honest limits up front. We are painters, not a coatings laboratory and not a coating inspection house: where a specification calls for abrasive blasting, a certified coatings inspector or a protective system beyond the products described below, we say so at the walkthrough rather than price around it. And we do not do line striping — aisle, walkway and hazard marking inside the building, or parking-lot striping outside — which is a separate trade.

The Short Answer

• Surface preparation is the specification. SSPC-SP 3 says a power tool cleaned surface "shall be free of visible deposits of oil and grease and shall be free of all loose mill scale, loose rust, loose paint, and other loose detrimental foreign matter" — and that adherent material may stay.
• A blast standard and a tool standard are different jobs. SSPC-SP 6 commercial blast cleaning limits random staining to "no more than 33 percent of each unit area of surface." SP 2 and SP 3 remove only what is loose.
• The manufacturers name both the minimum and the better answer. Macropoxy 646-100's bulletin gives SSPC-SP2 as the minimum for atmospheric steel, then says "For better performance, use Commercial Blast Cleaning per SSPC-SP6/NACE 3."
• Profile belongs in the spec as a number. Benjamin Moore's Corotech CV400 sheet asks for a blast profile "1-2 mils and be jagged in nature."
• Concrete has its own standard. SSPC-SP 13/NACE No. 6 says an acceptable prepared concrete surface "should be free of contaminants, laitance, loosely adhering concrete, and dust."
• Dry film thickness is a measured, arguable number. SSPC-PA 2 defines a spot measurement as "the average of at least three gage readings made within a 1.5 inch (4 cm) diameter circle," and allows no single spot below 80 percent of the specified minimum.
• New Jersey tightened its coating VOC limits on 18 August 2026. Under N.J.A.C. 7:27-23 the industrial maintenance limit moved from 340 to 250 grams per litre and dry fog coating from 400 to 150. A data sheet printed before that date is not evidence of compliance with it.
• Dry-fall is what makes an occupied warehouse ceiling possible, but its fall-out distance is 8 feet at 77°F and the sheet warns that "Dry fall characteristics will be affected at temperatures below 77°F(25°C) or above 50% RH."
• The federal RRP lead rule rarely reaches an industrial building; OSHA's lead standard does. RRP applies to "target housing and child-occupied facilities." 29 CFR 1926.62 applies to "all construction work where an employee may be occupationally exposed to lead." We are not an EPA Lead-Safe Certified firm — ask every bidder for a certificate number.

What "Industrial" Means Next to "Commercial"

The two words get used interchangeably and they are not the same job. A commercial repaint is mostly drywall, trim, hollow metal doors and ceiling grid in an occupied office or store: forgiving surfaces and a scheduling problem. An industrial repaint is a different substrate list in a building that is still running, and the hard part is the specification.

The building, by area

• Warehouse and distribution space. High open ceilings, exposed deck and bar joists, ductwork and sprinkler lines, block or metal walls, and racking that is loaded and staying loaded.
• Manufacturing floors. Walls and overhead steel around live equipment, limited by the cell schedule and by what can be covered.
• Structural steel and mezzanines. Columns, beams, mezzanine framing, stairs and handrails — the surfaces most likely to carry failing coatings.
• Metal buildings, block and tilt-up. Pre-engineered frames with metal panels, masonry units with open texture that must be filled, and precast panels outside.
• Ceilings and deck. Metal roof decking, joists, hangers and conduit, sprayed because nothing else is practical at that height.
• Racking-adjacent walls, docks and traffic zones. Bollards, guardrails and dock frames fail from impact rather than weather.

Why the substrate list is the real difference

An office repaint can be written as a schedule of rooms. An industrial repaint cannot, because two surfaces a few feet apart need different coatings for different reasons. A block wall in a loading area wants a filled, washable finish. The steel column in front of it wants a coating that tolerates rust that could not all be removed. The deck above wants something that dries in the air on the way down. The slab underneath wants a resinous system, not paint at all — a separate specification, covered on our epoxy flooring page and in our guide to commercial epoxy flooring in NJ.

So the useful test of an industrial proposal is whether it names a product, a preparation standard and a number of coats for each surface. A bid that says "two coats of industrial enamel throughout" has not been scoped. Height, condition and continuity of operation are what break a commercial specification when you move it into a plant.

Surface Preparation Decides Everything Else

Almost every industrial coating failure we are called to look at is a preparation failure wearing a coating's clothes: paint peeling in sheets off a column, a block wall blistering, a dock frame rusting under a one-year-old topcoat. Our guide to why paint peels covers the residential version of the same physics. What makes industrial work different is that the preparation has a published name, and the name has a definition you can hold a bid to.

The SSPC/AMPP ladder, and the profile that goes with it

The standards come from SSPC, now part of AMPP, several issued jointly with NACE. Four matter in a warehouse or plant.

SSPC-SP 1, Solvent Cleaning deals with oil, grease and soluble contamination rather than rust, and is the step most often skipped. The Macropoxy 646-100 application bulletin describes it from the applicator's side: "Methods described in SSPC-SP 1 include solvents, alkali, detergent/water, emulsions, and steam." Mould oil on a column and road film on a dock frame are both SP 1 problems, and sanding does not remove them — it spreads them.

SSPC-SP 2, Hand Tool Cleaning and SSPC-SP 3, Power Tool Cleaning are the realistic standards for most occupied-building steel. SP 3 separates itself from its sibling — "This standard differs from SSPC-SP 2 Hand Tool Cleaning, in that SSPC-SP 2 requires use of hand-held tools without supplemental power" — and its end condition is worth reading twice:

"A power tool cleaned surface, when viewed without magnification, shall be free of visible deposits of oil and grease and shall be free of all loose mill scale, loose rust, loose paint, and other loose detrimental foreign matter. It is not intended that adherent mill scale, rust, and paint be removed by this process."

The standard even defines how the argument is settled: material counts as adherent if it "cannot be removed by lifting with a dull putty knife," and it then specifies the knife down to blade thickness and flexibility. That is the level these documents work at, and it is why naming a standard in a proposal means something.

SSPC-SP 6/NACE No. 3, Commercial Blast Cleaning is the standard for steel being properly recoated. A commercial blast cleaned surface "shall be free of all visible oil, grease, dust, dirt, mill scale, rust, coating, oxides, corrosion products, and other foreign matter, except for staining as noted," with staining "limited to no more than 33 percent of each unit area of surface," the unit area being "approximately 58 cm² (9.0 in.²)." The only difference between SP 6 and near-white SP 10 is how much staining may remain: 33 percent against 5.

Cleanliness and profile are separate requirements. Corotech's CV400 sheet says "All direct to metal coatings provide maximum performance over near white metal blasted surfaces (SSPC-SP 10)," acknowledges that "situations and cost considerations" often prevent that, then sets a working recommendation: "The recommended standard is a commercial blast (SSPC-SP 6). The steel profile after the blast should be 1-2 mils and be jagged in nature." A profile made with worn abrasive, or a column burnished by an over-aggressive wire wheel, measures rough and performs smooth.

Prepared steel then has a shelf life in hours. The Macropoxy bulletin says "Prime any bare steel within 8 hours or before flash rusting occurs," so a plan that opens up more surface in a day than it can coat is specifying a failure.

Our own industrial work is done to the hand and power tool standards; a building whose steel genuinely needs SP 6 or SP 10 needs a blasting contractor in the scope.

Concrete and block have their own standard

Steel standards do not transfer to masonry, which is why SSPC-SP 13/NACE No. 6 exists. It "gives requirements for surface preparation of concrete by mechanical, chemical, or thermal methods prior to the application of bonded protective coating or lining systems," and applies "to all types of cementitious surfaces including cast-in-place concrete floors and walls, precast slabs, masonry walls, and shotcrete surfaces." An acceptable prepared surface "should be free of contaminants, laitance, loosely adhering concrete, and dust."

The word doing the work is laitance, defined in the standard as "a thin, weak, brittle layer of cement and aggregate fines on a concrete surface." Coat over it and the coating is stuck to something barely stuck to the concrete. SP 13 also supplies acceptance criteria you can write into a specification: surface tensile strength of "1.4 MPa (200 psi) min." for light service against "2.1 MPa (300 psi) min." for severe, and surface profile from "Fine (150) abrasive paper min." to "Coarse (60) abrasive paper min."

Power washing a block wall before painting is a real and useful step, and one we do — see our guide to power washing in NJ — but it is not the high-pressure water cleaning the standard defines, which starts at 5,000 psi. New concrete also needs time: Corotech's sheet sets it at "a minimum of 30 days before painting," which on a new building is a programme item, as our guide to new construction painting in NJ covers.

Coating Families and What Each One Is For

Once the preparation standard is fixed, the coating choice stops being a matter of taste. Each family does one thing well and something else badly, and the manufacturers' sheets are candid about both.

Waterborne acrylics and direct-to-metal

The workhorse for interior industrial walls, block and steel that is not being attacked. Sherwin-Williams describes its Pro Industrial Multi-Surface Acrylic as "a waterborne acrylic gloss for interior and exterior use on marginally prepared metal or masonry surfaces," "optimized for spray application" — which matters where rolling a wall behind racking is not realistic. Direct-to-metal means it goes onto prepared metal without a separate primer, which is a convenience, not a magic trick: the system tested on that same sheet was run over steel prepared to SSPC-SP10, a near-white blast. Read "marginally prepared" as "tolerates a tool-cleaned surface better than most," not as "preparation optional."

Dry-fall for ceilings and overhead steel

Dry-fall is the one product family that makes repainting an occupied warehouse ceiling possible. Sherwin-Williams' Pro Industrial Waterborne Acrylic Dryfall sheet explains the mechanism plainly: "With proper height-clearance, overspray is dry before it settles on floors, machinery or equipment. The dry overspray can then be easily removed by sweeping or by vacuum."

The number that decides whether it works in your building is the dry fall-out distance, given as a function of temperature: "8-20 ft." at 55°F and "8 ft." at both 77°F and 110°F. That is the clearance droplets need to be dry when they land. The sheet also carries the warning that belongs in every phase plan: "Dry fall characteristics will be affected at temperatures below 77°F(25°C) or above 50% RH." In an unconditioned New Jersey warehouse in July, humidity above 50 percent is the normal condition, so dry-fall reduces the protection needed rather than removing it. A second reason to spray a deck white is on the same sheet: light reflectance of 86 percent, which "can increase an area's lighting efficiency."

Epoxies, and the polyurethane that goes over them

Where there is chemistry, abrasion, condensation or impact, the specification moves to a two-component epoxy. Macropoxy 646-100 is "a high solids, less than 100 g/L VOC, high build, fast drying, polyamide epoxy designed to protect steel and concrete in industrial exposures," whose solids content "ensures adequate protection of sharp edges, corners, and welds." The gap over an acrylic is measurable on the same test: under ASTM D4060 with a CS17 wheel, 1,000 cycles and a 1 kg load, Macropoxy reports 84 mg loss and the Multi-Surface Acrylic reports 260 mg. That is the whole argument for epoxy on a dock jamb and acrylic on an office-side wall, in one pair of numbers.

Read the limitations, because the manufacturers publish them. Corotech's sheet says: "All epoxy coatings will chalk and fade if applied on exterior surfaces subjected to direct sunlight. All epoxies tend to yellow. Where color and gloss retention is important, top-coating will be necessary." It also "will not cure at surface temperatures below 45°F (7.2°C)." That is the case for a polyurethane: epoxy gives adhesion, build and chemical resistance, and a urethane over it gives colour and gloss retention outdoors. Sherwin-Williams' recommended systems show the pattern, with Macropoxy followed by "1-2 cts. Acrolon 218 Polyurethane" at 3.0 to 6.0 mils. On interior columns behind racking it is money spent on a quality nobody will see.

Elastomeric and weatherproof systems outside

Tilt-up, precast and block exteriors crack, and a conventional coating bridges nothing. Sherwin-Williams' ConFlex SherLastic sheet describes "a 100% acrylic coating that provides great flexibility, durability, and weather resistance" that "will protect against wind-driven rain when used on tilt-up, precast, or poured-in-place concrete, CMU, and stucco," with elongation of 175 percent by ASTM D2370 after a 14-day cure. The clause that decides whether it performs is film thickness, far heavier than a normal coat: "A minimum total dry film thickness of 8 - 12 mils of topcoat and a surface with 10 or less pinholes per square foot is required for a waterproofing system." A bid that prices an elastomeric at ordinary coverage rates has not read the sheet. Elastomeric and weatherproof coatings are part of what we do; what we will not do is sell you a branded coastal or salt-air "system," because no such product exists in our line.

Every figure there is a laboratory condition, and Macropoxy's sheet says so: "Drying time is temperature, humidity, and film thickness dependent." To handle takes 8 hours at 77°F and 48 hours at 40°F. Our guide to painting in cold weather in NJ covers what that does to a schedule.

Dry Film Thickness, and Why It Gets Measured

Dry film thickness, or DFT, is the number that tells you whether the specification was delivered, and it is the number most industrial proposals leave out. A coating's performance claims are tied to a film thickness, so the spec needs both ends. SSPC-PA 2 says so: "Both a maximum and a minimum thickness should be specified for the coating." Too thin and the barrier is not there; too thick and a high-build epoxy can be left with solvent trapped under a skinned surface.

How SSPC-PA 2 decides whether a coat conforms

A gage reading is "a single reading at one point." A spot measurement is "the average of at least three gage readings made within a 1.5 inch (4 cm) diameter circle." An area is a set of spot measurements, defaulting to 100 square feet. The averaging exists because "repeated gage readings, even at points close together, may differ due to small surface irregularities of the coating and the substrate."

Conformance is then judged at two levels at once. The average of the spot measurements for each 100-square-foot area "shall not be less than the specified minimum thickness," and "no single spot measurement in any 10 m² (100 ft²) area shall be less than 80% of the specified minimum thickness," though "any gage reading may under-run by a greater amount." On the maximum, the mirror image at 120 percent. Those tolerances, the standard says, "allow for the tolerance of the gage and calibration," not for the applicator. That gives a facility manager three fair questions for any bid: what DFT range is specified per coat, who measures it, and over what area size.

Recoat windows, and what happens when one is missed

Industrial coatings have a window, not a deadline, and both ends are published. Macropoxy gives a minimum recoat of 8 hours at 77°F and a maximum of one year, then states the consequence: "If maximum recoat time is exceeded, abrade surface before recoating." Corotech's window is far shorter — "10 – 12 Hours / Max: 3 Days" — with the same remedy: "Recoat after 72 hours: Abrade the surface to ensure proper inter-coat adhesion."

This is one of the most common hidden costs on a phased job. If a first coat goes on a mezzanine in week one and production needs the area back until week four, somebody has to abrade several thousand square feet of sound epoxy before the topcoat. That should be visible in the phase plan rather than discovered on site.

Substrates, One at a Time

Structural steel, columns and mezzanines

Interior structural steel in a dry building is usually a tool-cleaned, spot-primed, topcoated job: loose material off to SP 2 or SP 3, grease off to SP 1, bare steel primed, and a topcoat chosen for what the steel is near — a direct-to-metal acrylic or industrial enamel away from traffic, an epoxy where there is impact or chemistry, dry-fall on overhead steel sprayed with the deck. Edges, welds and bolt heads fail first, because film is naturally thinnest on a sharp edge. Sherwin-Williams writes the remedy into its application instructions: "Stripe coat crevices, welds, and sharp angles to prevent early failure in these areas." A stripe coat is a brushed extra pass on those details, and it is worth asking a bidder about by name.

Galvanised metal, which behaves nothing like steel

Galvanised handrails, duct, purlins, roof decking and door frames are everywhere in industrial buildings, and they are the substrate most often got wrong. Zinc is a reactive metal with its own oxides, and preparation that suits bare steel will either fail to clean it or cut through the coating you are protecting.

The manufacturers' answer is solvent cleaning plus a primer chosen for zinc. Macropoxy lists the minimum preparation for galvanising as SSPC-SP1 — solvent cleaning only, not blasting. Corotech is more specific: "Galvanized and Non-ferrous Metals: Solvent clean all surfaces. Apply one coat of Corotech V110 Acrylic Metal Primer or V175 Waterborne Bonding Primer," and for weathered galvanising, "Clean Thoroughly - Apply one coat V155 100% Solid Epoxy Pre-Primer." The governing standard is ASTM D6386, which "describes methods of preparing surfaces of new and weathered hot-dip galvanized steel for painting." Its whole point is that the treatment depends on how weathered the zinc is, so a specification saying "clean and paint all galvanised metal" has not asked the only question that matters.

Block, tilt-up and the exterior envelope

Concrete masonry units are porous, and a finish coat applied straight onto them sinks into the pores instead of covering them. The filler is a separate, much heavier product. Sherwin-Williams' Heavy Duty Block Filler, "an acrylic resin block filler for use on interior and exterior poured and precast concrete, concrete block, and cinder block," is listed at 18.0 to 34.0 mils wet and 10.0 to 18.0 mils dry, covering only 50 to 88 square feet per gallon — a fraction of a wall paint's spread. If a bid for block work has no filler line, the wall will look like unfilled block with paint on it, because that is what it will be.

Outside, two details decide the outcome. New or newly exposed masonry needs a pH check — ConFlex's sheet says that if "the pH is higher than 9, prime with Loxon Concrete and Masonry Primer." Previously coated tilt-up needs chalk dealt with as a sequence: "After power washing, apply 1 coat of Loxon Conditioner to tie any residual chalk to the surface." Painting over chalk without a conditioner is painting onto dust. Our guides to painting stucco in NJ and painting brick cover the other masonry envelopes.

Open ceilings, previously coated surfaces and corrosion

An open ceiling is one surface made of a dozen things: metal deck, bar joists, bridging, hangers, conduit, duct and sprinkler pipe. Sprinkler heads must be protected rather than coated, and a ceiling deck is frequently the dirtiest surface in the building — spraying onto forty years of settled dust is the ceiling version of coating over laitance, as our guide to painting ceilings describes for houses.

Almost no industrial repaint is onto a virgin substrate. Corotech's sheet is reassuring and careful in one paragraph: the product "can be applied over most old industrial finishes in good condition," and then, "Test patches are recommended to check for wrinkling or lifting of existing coatings." ConFlex's note is blunter: "Recognize that any surface preparation short of total removal of the old coating may compromise the service length of the system." A repaint over sound existing coating is usually the right economic decision, and it buys a shorter service life than a strip-and-recoat would. Pretending otherwise is how a ten-year expectation gets attached to a five-year system.

On corrosion, the manufacturers publish accelerated tests — Macropoxy reports salt fog by ASTM B117 at 6,500 hours and cyclic corrosion by ASTM D5894 at 12,000 hours; Corotech reports 1,000 hours of B117 with "Face Corrosion: None" and "Rust: 0.00%." Those are cabinet tests, not forecasts, and nobody has been promised a number of years on a dock canopy in Keyport. What they give you is the relative ranking between systems. In a New Jersey building the places that corrode are predictable: dock doors and frames where road salt arrives on trucks all winter, the bottom few feet of exterior steel, condensation lines on cold steel, and roof-edge steel. A sensible specification spends its money there rather than on an interior column in a dry aisle.

New Jersey Tightened Its Coating VOC Limits in August 2026

This is the newest thing on this subject and the one most likely to be missing from a specification written earlier in the year. New Jersey's architectural coatings rule, N.J.A.C. 7:27-23, "prescribes the rules of the Department for limiting the VOC content of, and using, architectural coatings," and applies to any person who "applies an architectural coating for compensation within the State of New Jersey" — which makes it a contractor's problem, not only a manufacturer's. Limits are "expressed as VOC content, thinned to the manufacturer's maximum thinning recommendation, excluding any colorant added to tint bases."

What changed on 18 August 2026

"Industrial maintenance coating" is a defined category, not a loose description: "a high-performance architectural coating, including primers, sealers, undercoaters, intermediate coats, and topcoats, formulated for application to substrates, including floors, exposed to one or more of the following extreme environmental conditions." The five conditions cover immersion or chronic condensation, "acute or chronic exposure to corrosive, caustic, or acidic agents," frequent exposure above 250°F, "frequent heavy abrasion," and "exterior exposure of metal structures and structural components" — that last one qualifying ordinary exterior metalwork on its own. "Dry fog coating" is "a coating labeled and formulated only for spray application such that overspray droplets dry before subsequent contact with incidental surfaces," which is dry-fall, and which took the largest cut in the table.

What it means for a specification

Mostly it means a specification should be checked rather than assumed. The products quoted above are comfortable — Macropoxy 646-100 lists "<100 g/L" and the Pro Industrial dryfall "less than 50 grams per litre" — while Corotech CV400 at 238 grams per litre catalysed sits under the new 250 limit without much room. Those sheets also carry compliance statements dated years before the new limit, and a 2021 statement is not evidence about a limit effective in August 2026, so ask for the current sheet for the exact product and sheen.

Two things make the check less obvious than it sounds: the limit is measured at maximum recommended thinning, so a reduced product is judged reduced, and colorant added at the counter is excluded from the printed figure — the same gap we describe in our guide to paint fumes and VOCs. One small requirement helps on site: an industrial maintenance coating made on or after 18 August 2026 must carry "For industrial use only" and/or "For professional use only" on the label, which tells you which limit the pail in front of you is under without a data sheet.

Working Around a Live Operation

Phasing, and who sets the windows

The building is divided into sections — by bay, aisle run, production cell, dock position or mezzanine — and only one is out of use at a time. The sequence follows from the coating physics: overhead first, then walls, then the floor, because nothing that drops should land on a finished surface.

The windows are yours, not ours. Planned maintenance shutdowns, seasonal lulls, a line changeover, a quiet week between programmes: those are the openings a phase plan is built around. Some contractors offer schedules outside the working day as well; if that is what your building needs, ask each bidder directly, because it changes both the price and the crew. Our own industrial work is phased around the windows the client sets. What belongs in the proposal before anyone mobilises is the phase map, the handover date per phase, what has to be cleared and by whom, and the cure times that gate each handover. Cure time is the item most often omitted: Corotech distinguishes "Light Industrial Use: 72 Hours. Moderate to Heavy Industrial Use: 7 days." A phase that hands a mezzanine back after a day and puts pallet jacks on it will need touching up.

Overspray, dust and ventilation

Spray is the only realistic method for ceilings, joists and high steel, so overspray control is a design problem rather than a tidiness problem. Dry-fall solves part of it by physics, within the clearance and humidity limits on its own sheet. The rest is covering: racking and stock sheeted or moved by agreement, machinery wrapped, sprinkler heads protected, and the zone under the work cordoned off with forklift routes agreed with the floor supervisor.

Dust is the overlooked half, and it comes from preparation rather than application — power tool cleaning, grinding, and sweeping up dried overspray. In any building with open product, packaging or food handling, that needs a plan agreed before the first phase. Odour is the third: waterborne acrylics and dry-fall are low-odour by industrial standards, two-component epoxies and solvent-borne urethanes are not. Macropoxy's sheet wants 40°F to 140°F, at least 5°F above dew point and 85 percent relative humidity maximum; the building's own air handling then decides how long the smell stays, and where there is no mechanical answer the schedule is the answer.

The Safety and Compliance Frame a Facility Manager Will Ask About

Most of these rules bind the contractor rather than the client, but the client has to coordinate them. The citations are to the Code of Federal Regulations as published, read from Cornell's Legal Information Institute because OSHA's own site refuses automated requests.

Working at height, scaffolds and lifts

Height defines industrial painting and the governing rule is short. Under 29 CFR 1926.501, "each employee on a walking/working surface (horizontal and vertical surface) with an unprotected side or edge which is 6 feet (1.8 m) or more above a lower level shall be protected from falling." Holes get their own clause, skylights included. There is also a duty that lands on an old mezzanine or roof: "The employer shall determine if the walking/working surfaces on which its employees are to work have the strength and structural integrity to support employees safely."

For scaffolds, 29 CFR 1926.451 sets a different fall trigger: "each employee on a scaffold more than 10 feet (3.1 m) above a lower level shall be protected from falling to that lower level." For the building owner the practical questions are floor loading under a lift, overhead clearance, and where lift routes cross forklift routes.

Confined spaces

Pits, tanks, sumps, tunnels and silos are confined spaces, and the construction standard makes identifying them a formal step before work starts. 29 CFR 1926.1203 requires that "before it begins work at a worksite, each employer must ensure that a competent person identifies all confined spaces in which one or more of the employees it directs may work, and identifies each space that is a permit space." Interior coating of a tank or pit is specialist work and is not something we take on.

Ventilation and respiratory protection

29 CFR 1910.134 sets an order of operations that is the opposite of what most people assume: with air "contaminated with harmful dusts, fogs, fumes, mists, gases, smokes, sprays, or vapors, the primary objective shall be to prevent atmospheric contamination," and "this shall be accomplished as far as feasible by accepted engineering control measures (for example, enclosure or confinement of the operation, general and local ventilation, and substitution of less toxic materials)." Respirators come after that, and where they are needed the employer must "establish and implement a written respiratory protection program with worksite-specific procedures."

Ventilation has its own construction section. 29 CFR 1926.57 states that local exhaust ventilation "shall be designed to prevent dispersion into the air of dusts, fumes, mists, vapors, and gases in concentrations causing harmful exposure." The phrase worth carrying into a specification is "substitution of less toxic materials": specifying a waterborne system where one will do the job is a control measure, not a compromise.

Hazard communication on a multi-employer site

A painting crew in a working plant makes the plant a multi-employer workplace, and 29 CFR 1910.1200 has wording for that. A hazard communication programme must include "the methods the employer will use to provide the other employer(s) on-site access to safety data sheets for each hazardous chemical the other employer(s)' employees may be exposed to while working." Separately, an employer must "maintain in the workplace copies of the required safety data sheets for each hazardous chemical" and ensure "that they are readily accessible during each work shift."

As a project checklist: safety data sheets for every coating, primer, filler and reducer should be handed over before the first phase and kept where the work is. We submit them with the proposal. Welding, cutting and torch work near fresh coatings or solvent vapour is a hot work question with its own permit system; we do not perform hot work.

Lead Paint in an Older Industrial Building

New Jersey has a great deal of pre-1978 industrial stock, and a repaint of its steel is where lead becomes a real question. It is also where the rules get misquoted in both directions.

Where the federal RRP rule applies, and where it does not

40 CFR 745.82 says the Renovation, Repair and Painting rule "applies to all renovations performed for compensation in target housing and child-occupied facilities." "Target housing" is "any housing constructed prior to 1978, except housing for the elderly or persons with disabilities or any 0-bedroom dwelling," and a "child-occupied facility" is a pre-1978 building "visited regularly by the same child, under 6 years of age, on at least two different days within any week."

A warehouse, plant or distribution centre is neither, so in the ordinary case RRP does not reach an industrial repaint, and a bidder who says otherwise has not read the scope. It can still bite at the edges of a mixed site — a pre-1978 building with a day-care portion, or housing on the same parcel. Our guide to lead paint in older NJ homes covers the residential rule in full.

The rule that does apply is OSHA's

The absence of RRP is not the absence of a lead rule. 29 CFR 1926.62, OSHA's lead standard for construction, covers "all construction work where an employee may be occupationally exposed to lead," including demolition, removal or encapsulation of lead-containing materials, renovation and maintenance operations. Its permissible exposure limit is "fifty micrograms per cubic meter of air (50 µg/m³) averaged over an 8-hour period."

What makes it immediately relevant is that the tasks it presumes to be high-exposure until an assessment proves otherwise are a list of surface preparation methods: manual scraping and sanding and heat gun work in the first tier, power tool cleaning without dust collection and dry abrasive clean-up higher, and abrasive blasting, welding, cutting and torch burning on lead-containing structures highest. Until exposure is assessed, those tasks require respiratory protection, protective clothing, hygiene facilities, biological monitoring and training. In plain terms: on a pre-1978 building, the preparation method is the lead question. Washing down and recoating a sound painted surface is a very different proposition from grinding a column.

What to ask every bidder, us included

We are not an EPA Lead-Safe Certified firm. That is a licensing fact, not a wording preference, and it does not change if it is phrased more softly. What we do is tell you plainly when a surface is likely to carry lead. The questions worth asking every bidder: has the coating been tested, and by whom; which preparation method is proposed on each surface, and does it appear on the OSHA presumption list; is the firm EPA Lead-Safe certified where that is required, and what is the certificate number; and what is the written plan for containment, clean-up and waste.

What Belongs in the Specification, and How to Compare Bids

Two industrial bids rarely differ because of labour rates. They differ because they are describing different jobs, and a specification is what makes them describe the same one.

A coating schedule, surface by surface

A coating schedule is a table, not a paragraph. One row per surface, and for each row: the substrate, its present condition, the surface preparation standard, the primer if any, the finish product and sheen, the number of coats, and the dry film thickness range. That is the document you can hand to two bidders and get comparable numbers back from. The rows people forget are the informative ones: the wall behind racking, the backs of dock doors, the underside of a mezzanine, stair stringers, and whether sprinkler pipe is in or out. A bid that is silent on those is cheaper for a reason.

Hold points, inspection and what a warranty covers

A hold point is a moment where work stops until someone has looked: preparation accepted on a defined section before any coating, primer DFT checked before the topcoat, and system DFT checked before the phase is handed back. SSPC-SP 6's requirement that "immediately prior to coating application, the entire surface shall comply with the degree of cleaning specified herein" is a hold point written into a standard. Large protective-coating contracts use an independent, credentialed coatings inspector. We hold no coating inspection credential and do not present ourselves as one; what we do is let preparation be seen and signed off section by section and record what was applied.

There are also two separate things called warranty. The manufacturer warrants the material: Sherwin-Williams' sheet language warrants products "to be free of manufacturing defects," with liability "limited to replacement of the defective product or the refund of the purchase price." That is a product warranty, not a performance promise about your wall. The other is a workmanship warranty from the contractor, covering application. A long warranty attached to a thin preparation specification is a warranty on a system set up to fail.

The comparison checklist

1. Is a surface preparation standard named per substrate, by its SSPC or ASTM designation, rather than a word like "prepped"?
2. Is a product and sheen named per surface, with the number of coats, so the schedule can be priced line by line?
3. Is a dry film thickness range given per coat, and is it inside the range on the manufacturer's current sheet?
4. Is block filler a separate line on any CMU work, and does exterior masonry carry the right film thickness and conditioner?
5. Is galvanised metal treated as its own substrate, with solvent cleaning and a zinc-appropriate primer, and is stripe coating of welds and edges mentioned on structural steel?
6. Is there a phase map with handover dates and cure times, and does it respect the product's maximum recoat window?
7. Are access equipment, floor loading and traffic interfaces addressed, having actually been walked, and are safety data sheets and certificates of insurance handled before mobilisation?
8. On a pre-1978 building, is lead addressed explicitly, and is anything excluded that you assumed was included — line striping, floor coating, roofing, hot work, tank interiors?

If two bids answer all eight, any remaining difference is a real commercial difference. If only one does, you are not comparing prices. The same logic written for a homeowner is in our guide to how to choose a painting contractor in NJ.

What We Do, and Do Not Do, on Industrial and Warehouse Work

1. We walk the building before we write anything, surface by surface, with heights, access and condition noted, and "which areas have to stay in use" asked at the start rather than the end.
2. We name a product and a number of coats for every surface in the proposal, so it can be set beside another bid line by line.
3. We prepare to the hand and power tool standards and say so. Loose rust, mill scale and failing coating come off, grease comes off first, and bare steel gets primed before it flash rusts.
4. We tell you when a surface needs more than we do. Abrasive blasting, specialist protective systems, tank and pit interiors and third-party coating inspection are outside what we take on, and you hear that at the walkthrough rather than after the contract.
5. We spray overhead with dry-fall products and plan that work for when the floor below can be cleared, so overspray lands as dust that sweeps up rather than wet paint on racking and stock.
6. We work in phases your operations manager sets, with a phase map and handover dates in the proposal, sequencing overhead, walls and floor so nothing drops onto a finished surface.
7. We do not do line striping. Aisle lines, walkways, hazard zones and parking-lot striping are a different trade. We lay the coating underneath and coordinate the cure schedule with the striping contractor your safety manager uses.
8. We hand over safety data sheets and certificates of insurance before we mobilise, and work to your site rules rather than our own.
9. We are not an EPA Lead-Safe Certified firm, and we say so in writing on any pre-1978 building rather than letting it come up later.
10. We leave the colour and product schedule on file, so the next touch-up and the next cycle match what is already on the wall.

Alongside industrial and warehouse buildings we also take on HOA and condominium common areas, schools and universities, medical and dental practices and restaurants and retail.

What we do not do, so there is no ambiguity: line striping and aisle or safety marking, abrasive blasting, electrostatic application, tank and pit interiors, hot work, roofing, siding replacement, remodeling of any kind, wrought iron fabrication, insurance, fire or water restoration, mould or mildew treatment, plaster repair, and steeple or tower work. Washing a building down, including power washing, is ours; treating mould is not. We hold no SSPC/AMPP contractor certification or coating inspection credential, we do not hold EPA Lead-Safe (RRP) certification, and we publish no branded coastal or salt-air system. We will tell you plainly which parts of your building need somebody else.

Plan Your Warehouse or Plant Repaint

An industrial number comes from walking the building, not from square footage, because the same floor area can be a very different job once you have looked at the steel, the heights and the phasing. NJ Painting Co. is a family-owned, fully insured painting company at 36 Church Rd, Morganville, NJ 07751, painting in New Jersey for more than 20 years with Benjamin Moore and Sherwin-Williams products. For a warehouse or plant we walk every area with your facility or operations manager, write the preparation standard, product and number of coats for each surface into the proposal, build the phase plan around the windows you give us, submit safety data sheets and certificates of insurance before we mobilise, and leave a product schedule on file when we finish. For the work itself see our industrial and warehouse painting page, for occupied-building work generally our commercial painting page, and for the slab our epoxy flooring page. We cover Middlesex and its warehouse corridor, Monmouth, Ocean, Mercer, Somerset, Burlington, Union, Essex, Hudson, Bergen and Passaic counties. Call (732) 239-0932 or request a free estimate, and ask us about the job minimum when you enquire.

Frequently Asked Questions

What are the SSPC surface preparation standards, and which one belongs in my specification?

They are published definitions of how clean a surface must be before coating, issued by SSPC, now part of AMPP. SSPC-SP 1 is solvent cleaning, for oil and grease. SSPC-SP 2 is hand tool cleaning and SSPC-SP 3 is power tool cleaning; both remove only what is loose, and SP 3 says explicitly that adherent mill scale, rust and paint are not meant to come off. SSPC-SP 6, commercial blast cleaning, allows staining on no more than 33 percent of each unit area, and SSPC-SP 13/NACE No. 6 covers concrete. The coating manufacturer's data sheet names a minimum for each substrate.

Does a warehouse ceiling have to be sprayed, and what is dry-fall paint?

Practically, yes: an open deck with bar joists, ductwork and sprinkler lines cannot be rolled at warehouse height. Sherwin-Williams describes its Pro Industrial Waterborne Acrylic Dryfall as designed for airless spray onto interior ceilings, and says that with proper height clearance overspray is dry before it settles on floors, machinery or equipment, so it can be swept or vacuumed up. The sheet gives a fall-out distance of about 8 feet at 77 degrees Fahrenheit and warns that dry fall characteristics are affected below that temperature or above 50 percent relative humidity.

What is dry film thickness and why does it get measured?

Dry film thickness is how thick the coating is once dry, in mils, and it is the number a coating's performance claims are tied to. SSPC-PA 2 defines a spot measurement as the average of at least three gauge readings taken within a circle an inch and a half across, and judges conformance over a 100-square-foot area: no single spot may fall below 80 percent of the specified minimum or exceed 120 percent of the specified maximum. Those tolerances exist, the standard says, to allow for gauge and calibration error.

Can a plant be painted while it is running?

Usually, yes, by phasing. The building is divided into sections and only one is out of use at a time, with phases fitted to windows the operations manager sets, including planned maintenance and shutdown periods. Overhead work is planned for when the floor below can be cleared, and the sequence runs overhead, then walls, then floor. The phase plan belongs in the proposal before anyone mobilises, with handover dates and the cure times that gate them.

Why does galvanised metal need different treatment from steel?

Because zinc is a different metal with its own oxidation behaviour, and preparation that suits bare steel either fails to clean it or cuts through the coating you are trying to keep. Sherwin-Williams lists the minimum preparation for galvanising as solvent cleaning per SSPC-SP1, not blasting. Benjamin Moore's Corotech sheet says to solvent clean and then apply an acrylic metal primer or a waterborne bonding primer, with a different pre-primer for weathered galvanising. The governing standard is ASTM D6386, whose point is that the right treatment depends on how weathered the zinc is.

Do New Jersey VOC rules affect which industrial coatings can be used?

Yes, and the limits changed recently. N.J.A.C. 7:27-23 applies to anyone who applies an architectural coating for compensation in New Jersey, and its Table 1 carries a column of limits operative 18 August 2026. The industrial maintenance coating limit moved from 340 to 250 grams per litre, dry fog coating from 400 to 150, floor coating from 250 to 100 and rust preventative coating from 400 to 250. Limits are measured at maximum recommended thinning and exclude colorant added to tint bases.

Does the EPA lead paint rule apply to painting a warehouse or factory?

Usually not. The federal Renovation, Repair and Painting rule applies to renovations performed for compensation in target housing and child-occupied facilities, both defined terms tied to pre-1978 housing and to buildings regularly visited by children under six, and a warehouse or plant is neither. OSHA's lead standard for construction does apply, with a permissible exposure limit of 50 micrograms per cubic metre averaged over eight hours, and it presumes high exposure for preparation methods including scraping, sanding, power tool cleaning and abrasive blasting until an assessment says otherwise. NJ Painting Co. is not an EPA Lead-Safe Certified firm; ask every bidder for a certificate number wherever that certification is required.

Do you do line striping or OSHA aisle marking?

No. Line striping is a different trade and we do not take it on, inside the building or in the parking lot, and that includes aisle lines, walkways, hazard zones and safety marking. What we do is the surface underneath, and we coordinate the cure schedule with the striping contractor your safety manager uses.

How long before equipment can go back on a new industrial coating?

It depends on the product and the temperature. Benjamin Moore's Corotech CV400 lists foot traffic at 24 to 48 hours and distinguishes light industrial use at 72 hours from moderate to heavy industrial use at seven days. Sherwin-Williams' Macropoxy 646-100 lists cure for service at seven days at 77 degrees Fahrenheit and ten days at 40. A cold warehouse in February is slower than the sheet's reference condition.