Interior Painting
Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
Showing changes from Rev 7
to Rev 8
in Interior Painting.
---
title: Interior Painting
…108 unchanged lines
- "Manufacturer warranty documentation"
- "Attic stock — labeled, sealed containers of each finish color"
−default: [Final color and paint system schedule, Manufacturer warranty documentation, Attic stock — labeled, sealed containers of each finish color]
+default:
+ - "Final color and paint system schedule"
+ - "Manufacturer warranty documentation"
+ - "Attic stock — labeled, sealed containers of each finish color"
```
…41 unchanged lines
### Where the contract documents require a mock-up, the Contractor shall produce in-place mock-ups of each major paint system on the actual substrate prior to production application.
−### Mock-ups shall demonstrate the complete system — surface preparation, primer, and finish coats — at the specified sheen and color, with the specified dry film thickness.
+### In-place mock-ups shall be constructed at the start of the work for each major system on each major substrate, sized and located as directed by the Architect (typically 100 square feet of wall in a representative space).
−### Mock-ups shall be reviewed and approved by the Architect before production work begins on that system.
+### Mock-ups shall show the complete system — preparation, primer, intermediate coats if any, and finish coats — at the specified sheen, color, and dry film thickness.
−### Approved mock-ups shall remain in place through the project as the standard for acceptance.
+### The mock-up shall be inspected under the lighting conditions of the finished space, approved in writing by the Architect, and retained as the standard of acceptance for production work.
+```datasheet
+label: Mock-Up Lighting Inspection
+type: radio
+options:
+ - "Required — inspected under finished-space lighting before approval"
+ - "Inspected under construction lighting only"
+default: "Required — inspected under finished-space lighting before approval"
+```
+
## Pre-Application Conference {toc}
…83 unchanged lines
## The Contractor shall not thin, tint, or modify products beyond what the manufacturer's published instructions allow.
−## Gypsum Board {toc}
+## Gypsum Board Coating Systems {toc}
```datasheet
…53 unchanged lines
### Deep, saturated, or low-hide colors — particularly reds, yellows, and oranges — frequently require three finish coats to achieve uniform hide and color depth. {note}
−## Plaster and Veneer Plaster {toc}
+## Plaster and Veneer Plaster Coating Systems {toc}
### Plaster substrates shall be cured to the plaster manufacturer's published schedule before painting and shall be tested for alkalinity.
…3 unchanged lines
### Where pH testing indicates surface alkalinity above 10, an alkali-resistant primer shall be used in lieu of the standard latex sealer.
−## Concrete and Concrete Masonry {toc}
+## Concrete and Concrete Masonry Coating Systems {toc}
```datasheet
…25 unchanged lines
### Block filler fills the porosity of CMU to produce a smooth, uniform surface that finish coats can cover at standard spreading rates; without block filler, finish coats sink into the open texture of the block, requiring three to four additional coats to achieve coverage. Block filler is not a primer substitute on smooth cast-in-place concrete, but it is the correct primer for the open texture of split-face or standard CMU. Water-based epoxy retains the application convenience of latex but cures to a film with higher resistance to abrasion, cleaning chemicals, and intermittent moisture. {note}
−## Ferrous Metal {toc}
+## Ferrous Metal Coating Systems {toc}
```datasheet
…41 unchanged lines
### Primer-finish incompatibility — for example, applying a strong solvent finish over a low-grade shop primer — causes lifting and wrinkling that cannot be corrected without complete removal and reapplication. {note}
−## Galvanized Metal {toc}
+## Galvanized Metal Coating Systems {toc}
```datasheet
…22 unchanged lines
### Galvanized metal shall not be painted with a standard alkyd or latex primer designed for ferrous substrates, because such primers cause saponification of the binder at the zinc surface and rapid peeling.
−## Interior Wood {toc}
+## Interior Wood Coating Systems {toc}
```datasheet
…204 unchanged lines
### Coating shall not be used to hide defects in the substrate.
−## Gypsum Board {toc}
+## Gypsum Board Surface Preparation {toc}
### Gypsum board shall be at the finish level required by the room finish schedule (see [[sync/gypsum-board-assemblies]] for finish level definitions).
…5 unchanged lines
### Damage to the board face — scratches, gouges, blue paper from sanding through the joint compound — shall be touched up with joint compound, sanded, and dust-removed before priming.
−## Plaster {toc}
+## Plaster Surface Preparation {toc}
### Plaster shall be cured and dry.
…5 unchanged lines
### Filling a structural crack with patching compound does not stop the cracking, and the finish will fail within the warranty period. {note}
−## Concrete and Concrete Masonry {toc}
+## Concrete and Concrete Masonry Surface Preparation {toc}
```datasheet
…18 unchanged lines
### Open holes, tie holes, and surface voids shall be filled with patching compound or grout, allowed to cure, and smoothed before priming.
−## Ferrous Metal {toc}
+## Ferrous Metal Surface Preparation {toc}
### Ferrous metal shall be cleaned of all oil, grease, and surface contamination per SSPC-SP 1 (solvent cleaning) as a baseline, then mechanically cleaned to the SSPC level required by the system table — typically SSPC-SP 2 or SP 3 for interior architectural ferrous metal, SP 6 commercial blast where existing mill scale or rust is present.
…3 unchanged lines
### Ferrous metal shall not be painted over rust, mill scale, or oily metal regardless of the urgency of the construction schedule, because painting over such surfaces causes immediate primer failure.
−## Galvanized Metal {toc}
+## Galvanized Metal Surface Preparation {toc}
### Galvanized metal shall be cleaned with a mild alkaline detergent and rinsed thoroughly to remove storage oils, mill passivators, and white rust.
…3 unchanged lines
### Wash primers and etch primers convert the surface chemistry to one that accepts the finish primer; without them, no standard primer will bond reliably to a smooth galvanized surface. {note}
−## Wood {toc}
+## Wood Surface Preparation {toc}
### Wood shall be sanded with the grain to a smooth finish.
…7 unchanged lines
### Filling before priming causes the filler to telegraph through the finish because the unprimed wood absorbs the filler oils. {note}
−# Application {toc}
+# General Application Requirements {toc}
−## General Application Requirements {toc}
+## All coatings shall be applied by experienced painters using equipment and techniques appropriate to the product and the substrate.
−### All coatings shall be applied by experienced painters using equipment and techniques appropriate to the product and the substrate.
+## The applicator shall produce a continuous, uniform film at the manufacturer's recommended dry film thickness, with no holidays, runs, sags, ropy texture, lap marks, brush marks, or other irregularities visible from normal viewing distance under the lighting conditions of the finished space.
−### The applicator shall produce a continuous, uniform film at the manufacturer's recommended dry film thickness, with no holidays, runs, sags, ropy texture, lap marks, brush marks, or other irregularities visible from normal viewing distance under the lighting conditions of the finished space.
+## The Contractor shall thin coatings only as the manufacturer's instructions allow, because thinning beyond the published limits reduces film build and durability.
−### The Contractor shall thin coatings only as the manufacturer's instructions allow, because thinning beyond the published limits reduces film build and durability.
+# Application Methods {toc}
−## Application Methods {toc}
−
```datasheet
label: Primary Application Method — Walls and Ceilings
…17 unchanged lines
```
−### Brush, roller, and spray are all acceptable application methods provided that each method produces a uniform film.
+## Brush, roller, and spray are all acceptable application methods provided that each method produces a uniform film.
−### The default method for interior walls and ceilings shall be roller, with brush or spray cut-in at edges, corners, and trim transitions.
+## The default method for interior walls and ceilings shall be roller, with brush or spray cut-in at edges, corners, and trim transitions.
−### Smooth metal doors and frames shall typically be sprayed for the most uniform finish.
+## Smooth metal doors and frames shall typically be sprayed for the most uniform finish.
−### The Contractor shall match application method to the mock-up so that the finished work matches the approved sample.
+## The Contractor shall match application method to the mock-up so that the finished work matches the approved sample.
−## Coat Sequence and Recoat Times {toc}
+# Coat Sequence and Recoat Times {toc}
−### Each coat shall be applied only after the previous coat has dried for the manufacturer's published recoat time.
+## Each coat shall be applied only after the previous coat has dried for the manufacturer's published recoat time.
−### Recoat times depend on temperature and humidity and shall be extended in conditions that slow drying.
+## Recoat times depend on temperature and humidity and shall be extended in conditions that slow drying.
−### Each coat shall be inspected for runs, sags, and missed areas and corrected before the next coat is applied.
+## Each coat shall be inspected for runs, sags, and missed areas and corrected before the next coat is applied.
−### Applying a coat before the previous coat is dry traps solvents and water in the film, producing soft, slow-drying, and adhesion-deficient layers. {note}
+## Applying a coat before the previous coat is dry traps solvents and water in the film, producing soft, slow-drying, and adhesion-deficient layers. {note}
−## Roller and Brush Discipline {toc}
+# Roller and Brush Discipline {toc}
−### When rolling, the applicator shall maintain a wet edge — continuously rolling into the freshly applied film rather than rolling back into a coat that has begun to skin.
+## When rolling, the applicator shall maintain a wet edge — continuously rolling into the freshly applied film rather than rolling back into a coat that has begun to skin.
−### Roller laps shall be feathered into the previously rolled area to avoid visible lap marks.
+## Roller laps shall be feathered into the previously rolled area to avoid visible lap marks.
−### When brushing, brushes shall be loaded properly, strokes shall be laid off in one direction at the end of each section, and brush marks shall be eliminated by working the film while it is still wet.
+## When brushing, brushes shall be loaded properly, strokes shall be laid off in one direction at the end of each section, and brush marks shall be eliminated by working the film while it is still wet.
−## Spray Application {toc}
+# Spray Application {toc}
−### Spray work shall be performed only in areas that can be fully masked and protected.
+## Spray work shall be performed only in areas that can be fully masked and protected.
−### Spray equipment shall be set to the manufacturer's specifications for the product being applied.
+## Spray equipment shall be set to the manufacturer's specifications for the product being applied.
−### Mist coats and full-build coats shall be coordinated so that the total film thickness matches the system requirement.
+## Mist coats and full-build coats shall be coordinated so that the total film thickness matches the system requirement.
−### Spray application produces the most uniform film when properly executed but introduces risks of overspray contamination of adjacent surfaces, dry-fall on detail work, and uneven film build at edges. {note}
+## Spray application produces the most uniform film when properly executed but introduces risks of overspray contamination of adjacent surfaces, dry-fall on detail work, and uneven film build at edges. {note}
# Coverage Rates and Dry Film Thickness {toc}
…44 unchanged lines
## Where the thickness substantially exceeds the maximum, the cause shall be identified and corrected before further work proceeds.
−# Mock-Ups {toc}
−
−```datasheet
−label: Mock-Up Lighting Inspection
−type: radio
−options:
− - "Required — inspected under finished-space lighting before approval"
− - "Inspected under construction lighting only"
−default: "Required — inspected under finished-space lighting before approval"
−```
−
−## In-place mock-ups shall be constructed at the start of the work for each major system on each major substrate, sized and located as directed by the Architect (typically 100 square feet of wall in a representative space).
−
−## Mock-ups shall show the complete system — preparation, primer, intermediate coats if any, and finish coats — at the specified sheen, color, and dry film thickness.
−
−## The mock-up shall be inspected under the lighting conditions of the finished space, approved in writing by the Architect, and retained as the standard of acceptance for production work.
−
# Protection of Adjacent Work {toc}
…108 unchanged lines
### Failures caused by inadequate humidity control during the warranty period — for example, persistent condensation on cool walls in an under-ventilated space — are excluded as environmental, not workmanship.