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A commercial repaint is a specified coating system applied over an existing building finish—not simply two new coats of wall paint. The right system matches the substrate, exposure, existing-film condition, preparation level, environmental requirements, occupancy schedule, and service-life target. For exterior maintenance work, the Master Painters Institute (MPI) Section 09915 guide, revised August 2024, is the central reference; new construction belongs in MPI’s separate architectural painting manual.
Most ordinary commercial interiors can use a professional zero-VOC acrylic, while corridors, schools, hospitals, and other high-traffic areas need a more scuff-resistant enamel. Masonry, stucco, tilt-wall concrete, aluminum curtain wall, and structural steel require different preparation and coating families. There is no universal repaint interval in US code: published owner requirements and contractor planning ranges generally fall around five to 10 years for ordinary exteriors, three to five years for heavily trafficked interiors, and longer only when a high-performance system and excellent preparation justify it.
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What is a commercial repaint?
A commercial repaint renews an existing painted or finished surface under a written scope that defines inspection, preparation, products, application, acceptance, and protection. MPI describes its maintenance guide as appropriate when “a comprehensive specification is required to specify repainting over previously painted or finished exterior surfaces.” That distinction matters: a repaint must account for adhesion, chalking, corrosion, moisture, incompatible previous coatings, and defects that a new-build specification would never encounter.
New construction and maintenance use related but different documents. NBS records the MPI Architectural Painting Specification Manual as a 2024 publication that supersedes the 2021 edition, while the Maintenance Repainting Manual addresses existing finishes. Current project manuals may use MasterFormat 09 91 00 Painting and 09 96 00 High-Performance Coatings, whereas the MPI exterior repaint guide retains legacy Section 09915. Match the numbering and system identifiers to the project’s MasterFormat edition; do not paste 09915 IDs into a 09 91 00 section without editing and checking them.
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How should a commercial repaint specification be assembled?
Use a layered specification rather than a brand name alone. Each layer answers a different risk.
- MPI system selection: Choose the current substrate-specific repaint system and identify its environmental or performance classification. MPI’s online subscription to both the Architectural Painting and Repainting manuals was listed at $310 for one year or $586 for two years when checked in November 2026; the store says its approved-products list covers 230 interior and exterior categories. Those prices are for reference manuals, not paint.
- PCA standards: The Painting and Decorating Contractors of America is now the Painting Contractors Association (PCA). A 2026 summary of the September 2023 standards describes P1 through P25, with P18 and P25 discontinued in December 2022. Confirm the current PCA text before citing a number in a contract.
- AMPP preparation standards: Structural steel and high-performance work commonly reference AMPP standards formerly issued by SSPC and NACE, together with dry-film-thickness requirements. The exact preparation grade belongs in the project documents.
- Manufacturer data: The current technical data sheet controls spread rate, recoat window, surface temperature, moisture limits, thinning, application method, cure, and compatibility. A guide specification or product brochure never replaces that sheet.
- Owner requirements: Institutions may impose minimum service lives, VOC limits, environmental certifications, or approved-product rules. The University of British Columbia guideline is an owner standard for its Vancouver and Okanagan campuses, not a US code.
Manufacturer specifier programs can help teams translate these requirements into a system. For example, Sherwin-Williams says its commercial and government portfolio aligns products with MPI classifications and UFGS requirements, and its project-development managers support teams during early design. Those are manufacturer statements, so the contract should still identify the required MPI category, preparation, and performance—not merely a sales representative’s recommendation.
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How much preparation does a commercial repaint need?
Preparation is usually the largest labor and risk variable. PCA P14, summarized by RenderDraw’s estimating guide, describes Basic, Standard, Superior, and Supreme repaint preparation levels tied to MPI existing-condition designations DSD-0 through DSD-4. A higher level means more removal, repair, smoothing, priming, and visual correction before finish coats.
PCA P1 defines a properly painted surface as one judged without magnification from at least 39 inches (1 meter), under finished lighting and from a normal viewing position. P4 assigns responsibility for inspecting and accepting the substrate before painting, so defects from another trade do not silently become the painter’s unpaid scope. P5 addresses benchmark samples, P10 measurement, and P23 typical exclusions. Put those decisions in the contract before mobilization.
A practical survey records chalking, peeling, cracking, efflorescence, mildew or algae, rust, staining, surfactant leaching, freeze-thaw damage, and areas of failed adhesion. Runs and sags of old paint must be scraped or sanded away before recoating. Power washing is not a substitute for removing unsound film, repairing failed joints, or allowing the substrate to dry.
Field contractors commonly describe preparation as power washing, scraping, wire brushing, spot repair, and priming, with the exact standard referenced to the contract’s AMPP or SSPC-based requirement. Occupied work may be sequenced at night or on weekends. Agree who removes signs, protects equipment, moves furniture, repairs substrate defects, and disposes of debris; otherwise “prep” remains an unlimited change-order risk.
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Which coating system fits each commercial substrate?
Select chemistry by substrate and exposure first, then compare brands that meet the required classification.
| Substrate or zone | Typical system direction | Examples named in the available data | Key cautions |
|---|---|---|---|
| Ordinary interior gypsum board, plaster, offices | Professional zero-VOC acrylic latex | ProMar 200 Zero VOC; Benjamin Moore Ultra Spec 500; PPG Speedhide | Confirm sheen, touch-up, hide, and compatibility with the existing film. |
| Corridors, schools, hospitals, retail, doors and trim | Scuff-resistant waterborne enamel or higher-performance acrylic | ProMar 200 HP Zero VOC; Scuff Tuff; Benjamin Moore Scuff-X; PPG Speedhide Duramax | Allow the specified cure and recoat time; higher performance can increase cost and odor. |
| Concrete, masonry, stucco, tilt-wall | High-build, elastomeric, or masonry-specific coating | Loxon XP; Ultra Spec Masonry Elastomeric Waterproofing Coating 0360 | Resolve alkalinity, efflorescence, moisture, cracks, and joint movement first. |
| Ferrous steel and exposed structural metal | Corrosion-control primer plus compatible finish, or an approved direct-to-metal system | Zinc-rich primer with high-performance acrylic or aliphatic polyurethane; Pro Industrial DTM Acrylic where the data sheet permits | Do not delete primer from a structural-steel specification without confirming the exact product and preparation. |
| Aluminum curtain wall and panels | Maintenance coating system after sound-film preparation and corrosion treatment | Project-specific metal coating system | Peeling allows moisture and salts to accelerate corrosion; extensive deterioration may require panel replacement. |
For ordinary interiors, Sherwin-Williams describes ProMar 200 Zero VOC as offering durability, hide, and touch-up in six sheens and all colors. Its ProMar 200 HP Zero VOC is described as providing abrasion resistance and meeting MPI High Performance and X-Green categories; the extracted guide does not provide the exact MPI category number, so obtain it from the current product documentation. Scuff Tuff is positioned for resistance to scuffing, scratching, and burnishing. A dry-erase clear gloss is listed for compatible surfaces but is specifically not intended for heavy-duty protection.
Contractor practice broadly follows that split: Indiana Painting identifies ProMar 200 Zero VOC as a standard commercial-interior default and the HP version for schools, hospitals, and retail. For more demanding washability or deeper colors, it names higher-tier interior products. These are trade recommendations, not independent laboratory rankings.
What should be used on exterior masonry and concrete?
Exterior masonry needs a coating that tolerates alkalinity, vapor movement, wind-driven rain, and substrate movement. Sherwin-Williams describes Loxon XP as a high-build concrete and masonry coating that resists alkali, efflorescence, and wind-driven rain, with less than 50 g/L VOC, according to its Commercial Facilities Coating Systems Guide.
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An Arcat-hosted Benjamin Moore guide specification lists Ultra Spec Masonry Elastomeric Waterproofing Coating Low Lustre 0360 at 95 g/L VOC in one three-coat masonry waterproofing schedule. It also lists Coronado Cryli Cote 100 percent acrylic exterior flat as MPI No. 10 in a value-option schedule. Treat the Green Seal GS-11 date printed in that guide as the edition of that document, not proof of the edition a 2026 project must cite; confirm the owner’s required edition.
For aging concrete tilt-wall, contractors describe a sequence of power washing, spot repair, primer, texture coating, and finish paint. Elastomeric systems can bridge certain nonstructural cracks and accommodate movement, but they are not a remedy for active leaks, failed sealants, or structural cracking. Confirm moisture conditions, crack treatment, and vapor behavior before choosing a high-build film.
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When should a metal façade be recoated instead of replaced?
Recoat while the existing film remains sufficiently bonded and corrosion is manageable. Sherwin-Williams lists corrosion, chalking, fading, peeling, cracking, and staining as warning signs on metal façades. Its maintenance guidance warns that once coatings peel, moisture and salts can penetrate aluminum panels, accelerating corrosion; if corrosion becomes extensive, full curtain-wall-panel replacement may be necessary.
That does not mean every stain requires a full repaint. Inspect the extent of corrosion, test adhesion, identify the existing coating, and determine whether salts or contaminants remain after cleaning. A documented St. Louis project used pressure washing, spot masonry primer, two finish coats on concrete, and a rust-arrestor primer followed by a two-part industrial finish on wrought iron. It demonstrates one field sequence, not a universal product schedule.
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How often should commercial buildings be repainted?
There is no single legally mandated US repaint interval supported by the sources here. Timing depends on substrate, exposure, preparation, coating tier, occupancy, and whether “life” means acceptable appearance, weather protection, or an owner’s minimum design expectation.
| Source and context | Published range or minimum | How to use it |
|---|---|---|
| UBC Technical Guidelines 09 90 00 | 8 years minimum for standard exterior coatings; 15 years minimum for high-performance coatings; more than 60 years for silicate coatings on cementitious heritage finishes; 5–10 years for interior coatings | Owner requirements for UBC Vancouver and Okanagan, not a general US rule. |
| A & K Painting Company | 5–10 years exterior; 3–5 years for high-traffic interiors | Contractor planning guidance. |
| Moorhouse Coating | 5–10 years generally; 5–7 years in Arizona sun | Contractor guidance reflecting harsher exposure. |
| World Pro Painting | 3–5 years for economy exterior paint versus 10–15 years for premium acrylics with proper preparation | Attributed contractor claim, not a manufacturer warranty. |
| Painters in Dublin | 5–8 years in the stated Irish climate | Geography-specific guidance; do not import it into a US specification. |
Wood generally belongs toward the short end because it moves and weathers. Sound masonry and metal panels can remain serviceable longer if the film is bonded and the detailing keeps water out. Write the expected cycle as an assumption tied to inspection and maintenance, not as “repaint every seven years” presented as code.
How do VOC, durability and lifecycle cost affect the choice?
MPI’s exterior guide expressly says that selecting an environmentally friendly waterborne or oil-based product requires considering total VOC content together with lifecycle and durability. A zero-VOC label does not make a short-lived coating economical if it requires an early disruptive recoat, and a low-VOC solvent system may still be unacceptable in an occupied building because of vapor and cleanup requirements.
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Professional low- and zero-VOC options are available: ProMar 200 and ProMar 200 HP are identified as zero VOC, Loxon XP is stated at less than 50 g/L, and the 0360 masonry elastomeric schedule is listed at 95 g/L. Verify the current technical data sheet, local VOC rule, environmental certification, and owner standard for the actual product and jurisdiction.
Lifecycle cost includes initial preparation, materials, application, access, containment, maintenance, and disposal. J. Paul Guyer’s 2023 coatings course paper notes that removal debris can require containment and disposal when old coatings may be hazardous. On older buildings, require a hazardous-materials survey before scraping, sanding, or blasting; do not improvise a lead or chromate abatement procedure in a paint specification.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What does a professional commercial repaint scope include?
- Survey and document: Map substrates, existing coatings, chalk, peeling, cracks, efflorescence, mildew, corrosion, and moisture. Treat a peeling metal façade as a water-ingress risk, not merely a color issue.
- Set the acceptance rules: Choose the PCA P14 preparation level, state the P1 viewing distance, define benchmark areas under P5, and assign substrate acceptance under P4.
- Select systems: Use the current MPI repaint manual by substrate. State the MPI environmental or performance classification and VOC cap alongside each system.
- Write preparation: Specify washing, scraping, sanding, wire brushing, repairs, profile, priming, removal limits, AMPP references, and dry-film thickness where applicable.
- Submit products and samples: Require current product data, safety information, MPI approval or category evidence, colors, sheen, and benchmark samples before broad application.
- Control occupancy and weather: Schedule noisy or odorous work during approved off-hours, isolate occupied areas, and protect exterior coatings from rain, snow, condensation, dust, salt spray, contamination, and freezing until fully dry.
- Inspect and maintain: Record batch information, application conditions, repairs, and final colors. Establish inspection triggers and the next maintenance cycle rather than relying on a calendar date alone.
Which brand is best for a commercial project?
There is no universal “best” brand independent of substrate, color, distribution, and specification. Moorhouse Coating’s 2025 comparison calls Sherwin-Williams the best general choice because of its commercial range, availability, durability, and contractor support; it positions Benjamin Moore for color-critical or architect-specified work and PPG for value-conscious projects. That is a contractor’s opinion, not a head-to-head laboratory result.
The more defensible selection order is: substrate and exposure, new work versus repaint, preparation level, performance tier, VOC and occupancy constraints, sheen and cleanability, service-life target, then brand and purchasing channel. A product that meets the required MPI category and technical-data-sheet conditions is a better specification decision than a familiar brand that does not match the wall.
How should a commercial repaint be priced?
Preparation, access, repairs, containment, and labor usually move the budget more than the difference between neighboring gallon prices. As one contractor comparison, Moorhouse lists Sherwin-Williams coverage at 350–400 square feet per gallon and $35–$85 per gallon, checked against its 2025 table. Those figures are not a Sherwin-Williams technical-data-sheet spread rate or a universal market price; theoretical coverage also excludes jobsite loss.
For budgeting, request a measured quantity takeoff that separates preparation, primer, finish coats, lifts or swing stages, protection, repairs, off-hours premiums, and disposal. Require alternates by performance tier—standard, high-performance, and specialty masonry or metal—so the owner can compare lifecycle cost instead of accepting a single opaque allowance.
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What should the final specification say?
A complete commercial repaint specification identifies the existing substrate and film, preparation level, inspection and acceptance rules, MPI system or equivalent performance requirements, product data-sheet references, VOC and environmental criteria, color and sheen, number of coats, dry-film thickness where required, repair limits, benchmark samples, protection, occupancy controls, weather limits, cleanup, warranty language, and maintenance records.
The central decision is not “Which paint is cheapest?” It is “Which maintainable system will protect this substrate, meet the building’s environmental and appearance requirements, and avoid an earlier disruptive repaint?” That approach keeps professional coatings, preparation, and lifecycle performance aligned.
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Frequently Asked Questions
Can a commercial building be repainted while it remains occupied?
Yes, if the specification controls ventilation, odor, dust, access, isolation, and cure time. Plan high-odor or noisy operations for approved nights or weekends, and verify that the selected coating’s recoat and occupancy limits fit the schedule.
Do commercial interiors always need two finish coats?
Not automatically. The required number depends on the existing color and sheen, substrate uniformity, product data sheet, hide, and the approved benchmark sample; a specification should state the system and acceptance result rather than assume a universal coat count.
Is elastomeric paint suitable for every exterior wall?
No. It is intended for compatible masonry or other approved substrates where movement and weather resistance justify it. Active leaks, failed sealants, structural cracks, or trapped moisture must be corrected before applying a high-build film.
How can an owner avoid a repaint change order?
Define substrate responsibility, preparation level, exclusions, access, repairs, measurement rules, and benchmark acceptance before bidding. A preconstruction survey and written hazardous-materials determination are especially important on older buildings.
What documents should the contractor submit before painting starts?
Request current technical data and safety information, MPI category or approved-products evidence, color and sheen samples, preparation methods, product compatibility information, application conditions, and a benchmark-area proposal. For corrosion-control work, include the referenced AMPP preparation standard and dry-film-thickness requirements.
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