Practical Trades Manual Series
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Book 15 — Painting and Surface Finishes: Preparation, Priming, Painting, Staining, and Protective Coatings

Chapter 1

Inspect Interior Surfaces and Plan a Paint Project

Inspect one interior room or practice area under normal and raking light, screen for hazardous coatings and active moisture, identify every substrate and defect present, and produce a documented preparation, product-selection, protection, and application plan before any paint is opened.

Field Cue System

These cues appear at the point of work. They identify safety, code, manufacturer, and measurement issues before they become rework or hazards.

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Safety Cue

Task-specific safety guidance for ordinary work hazards.

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Critical Safety Cue

Serious health hazard, contamination, or major damage is possible.

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Field Safety Cue

Practical work-area safety: lighting, footing, ladders, and housekeeping.

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Code Alert

Local requirements vary. Verify hazardous-material, permit, and disclosure rules.

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Manufacturer Cue

Follow product-specific instructions for cleaners, testers, and coatings.

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Measurement Cue

Area, coverage, and documentation guidance.

Job Overview

This chapter qualifies you to inspect an interior room or practice area, correctly identify every substrate and surface condition present, screen for hazards that must stop work, and produce a documented paint-project plan. The finished work product is a completed Room Inspection and Paint-Readiness Worksheet covering every wall, ceiling, trim run, door, cabinet, and adjacent surface in the room, along with a written readiness decision: approved, conditional, or rejected.

You will identify each surface's substrate, inspect walls and ceilings under normal and raking light, inspect trim, doors, cabinets, and built-ins for gloss and contamination, test existing coating adhesion, screen for active moisture and hazardous-coating conditions, classify stains by probable cause, select the required preparation and coating systems, calculate material quantities, and issue a documented readiness decision.

This is the first chapter in the book. No prior painting chapter is required, but every later chapter in this book depends on the inspection, hazard-screening, and planning method taught here. Chapter 2 protects and stages the room you inspect in this chapter. Chapters 3 through 20 all begin from the plan produced here.

Skills You Will Demonstrate

  • PF-001 — Inspect drywall and plaster surfaces under normal and raking light and record defects.
  • PF-002 — Inspect trim, doors, cabinets, and built-ins for gloss, contamination, and coating condition.
  • PF-003 — Identify stains and defects by probable cause using a documented classification method.
  • PF-004 — Identify existing coating condition through observation and an adhesion or compatibility test.
  • PF-005 — Select a coating and preparation system appropriate to the identified substrate and defect conditions.
  • PF-006 — Document paint-project readiness and issue an approved, conditional, or rejected decision.

Where This Skill Fits

Every coating project in this book begins the same way: a documented inspection that identifies the substrate, the defects, the hazards, and the required systems before any product is purchased or opened. The hazard-screening and stop-work method taught here — for suspected lead-based paint, active moisture, and unknown coatings — applies without exception through Chapter 20.

The readiness decision you issue at the end of this chapter is the same document Chapter 2 uses to plan protection and ventilation, Chapter 7 uses to select primers, and Chapter 19 uses as the baseline for the final quality inspection. A project that skips this chapter's screening step has no verified basis for any later material selection.

Scope and Intended Use

This chapter covers:

  • identifying drywall, plaster, wood, MDF, metal, laminate, masonry, cabinet finish, door, and other approved substrates present in the room
  • inspecting walls, ceilings, trim, doors, cabinets, and built-ins for defects, gloss, and contamination
  • screening for active leaks, condensation, mold, substrate movement, and corrosion
  • screening for conditions requiring lead or other hazardous-coating testing
  • classifying stains by probable cause
  • selecting cleaning, patching, sanding, caulking, stain-blocking, priming, and finish-coating systems appropriate to the findings
  • calculating estimated surface area and material quantities
  • producing a documented, defensible paint-project readiness decision

This chapter does not authorize the learner to:

  • scrape, sand, grind, burn, heat-gun, blast, or otherwise disturb any suspect lead-based paint or other hazardous coating; that disturbance requires the testing and controls addressed later in this book and, where indicated, a lead-safe certified contractor
  • begin cleaning, patching, priming, or coating any surface; those tasks belong to Chapters 2 through 20 and may not begin until this chapter's readiness decision is approved or conditionally approved
  • proceed past a stop-work condition identified in this chapter, including active leaks, condensation, widespread mold, structural movement, or unknown industrial coatings, without the required correction or qualified-professional evaluation
  • issue a final readiness decision for a room where a required hazard test has not yet returned a result

Any room, surface, or condition that fails the screening steps in this chapter must be corrected, tested, or referred to a qualified professional before this chapter's readiness decision may be approved.

Reference Conventions

Establish these references before recording any finding, and use them consistently across the worksheet.

TermDefinition
Normal lightStandard room lighting or daylight used for a first-pass, general-condition inspection
Raking lightA light source held low and to the side of a wall or ceiling surface so it grazes across the surface, revealing texture defects, ridges, and irregularities invisible under normal light
SubstrateThe base material of a surface — drywall, plaster, wood, MDF, metal, laminate, masonry, or another approved category — identified separately for every surface in the room
Sound coatingAn existing coating that passes the adhesion test with no lifting, flaking, or removal of material
Failing coatingAn existing coating that lifts, flakes, chalks heavily, or otherwise fails the adhesion test or visual inspection
Stop-work conditionAny finding in this chapter — active moisture, suspected hazardous coating, structural movement, or unknown industrial coating — that halts further inspection of the affected area until it is corrected, tested, or referred

Room Identification Record

Before beginning the inspection, record the room identity and issued documents directly on the Room Inspection Worksheet:

Room name/number: ______     Approved finish schedule attached: ______ (Y/N)     Color schedule attached: ______ (Y/N)

Date started: ____________     Inspector name: ____________

Prerequisites

Common Field Fundamentals

Every coating project in this book, from this chapter's readiness decision to the Chapter 20 capstone, begins with the same sequence: gather approved documents, identify substrates, inspect under both normal and raking light, screen for hazards and moisture, classify defects and stains, select systems, estimate materials, and issue a documented decision. Learning that sequence here, before any product is purchased, means every later chapter starts from a plan you can defend.

Walls / CeilingsNormal and raking light; nail pops, cracks, texture defects, stains
Trim / DoorsGloss, grease, wax, silicone, damage, open joints, hardware conflicts
Cabinets / Built-insGloss, contamination, loose coatings, hardware conflicts
Floors / FixturesIdentify surfaces requiring protection during later chapters
Moisture / StructuralActive leaks, condensation, mold, movement, corrosion — stop-work screen
Hazardous coatingAge, location, and condition factors that trigger required testing
StainsClassified as water, tannin, smoke, grease, rust, ink, marker, or unresolved
Readiness decisionApproved, conditional, or rejected — issued only after every screen is recorded

Normal Light and Raking Light

A normal-light pass identifies overall condition, obvious damage, and gross contamination. A raking-light pass — light held low and to the side of the surface — reveals joint ridges, texture inconsistencies, nail pops, and surface irregularities that normal room lighting hides. Every wall and ceiling in this chapter must be inspected under both conditions; a raking-light pass is not optional for any surface receiving a new finish coat.

PF-001 – PF-006

Inspection / Hazard-Screening / Planning Qualification

Room Inspection and Paint-Readiness Plan

Difficulty: Beginner

Estimated Time: 3–5 hours

Estimated Cost: $0–$40

Finished Work: Completed Room Inspection Worksheet, Hazard-Screening Worksheet, and documented readiness decision

A. Finished-Project Specification

Scope: one interior room or approved practice area, every wall, ceiling, trim run, door, cabinet, built-in, floor, window, and fixture within it inspected and recorded, resulting in one documented readiness decision covering the entire room.

B. Room Inventory Schedule

Surface CategorySubstrate OptionsInspection Focus
Walls / CeilingsDrywall, plaster, or another approved substrateNail pops, cracks, dents, holes, joint ridges, texture defects, stains, chalking, peeling, bubbling, moisture marks
Trim / DoorsWood, MDF, or another approved substrateGloss, grease, wax, silicone, damage, open joints, loose coatings, hardware conflicts
Cabinets / Built-insWood, laminate, MDF, thermofoil, or another approved substrateGloss, contamination, damage, loose coatings, hardware conflicts
Floors / Windows / Fixtures / AppliancesAs present in the roomIdentify surfaces requiring protection in Chapter 2

C. Documentation Takeoff

  • Worksheets: one Room Inspection Worksheet and one Hazard-Screening Worksheet per room, completed in full before the readiness decision is issued.
  • Photographs: one photograph minimum for every recorded defect, stain, and hazard-screen finding, labeled with its worksheet location entry.
  • Attachments: approved finish schedule and color schedule, if issued, attached to the worksheet; if not issued, the worksheet must record that fact and identify who will supply them before Chapter 2 begins.

D. Acceptance Standards

CheckStandard
Substrate identificationEvery wall, ceiling, trim run, door, cabinet, and built-in assigned one substrate category
Raking-light inspectionPerformed and recorded on every wall and ceiling surface scheduled to receive a new finish coat
Hazard screeningEvery applicable item on the Hazard-Screening Worksheet recorded with a result before the readiness decision is issued
Stop-work conditionsAny active moisture, suspected hazardous coating, structural movement, or unknown industrial coating recorded, and the affected area excluded from the readiness decision until corrected or cleared
Stain classificationEvery recorded stain assigned a probable cause: water, tannin, smoke, grease, rust, ink, marker, or unresolved
System selectionCleaning, patching, sanding, caulking, stain-blocking, priming, and finish-coating systems identified for every substrate and defect condition present
Readiness decisionOne documented decision issued: approved, conditional (with listed prerequisites), or rejected (with listed reasons)

E. Document Review and Substrate Identification

  1. Obtain the approved finish schedule, color schedule, product requirements, substrate information, and room-use conditions. Record which documents were supplied and which were not.
  2. Identify each surface as drywall, plaster, wood, MDF, metal, laminate, masonry, cabinet finish, door, or another approved substrate. Record the substrate category for every wall, ceiling, trim run, door, cabinet, and built-in on the Room Inventory Schedule.

F. Wall, Ceiling, and Trim Inspection

  1. Inspect walls and ceilings under normal and raking light. Walk each surface twice: once under normal room lighting, once with a handheld light held low and to the side.
  2. Record nail pops, cracks, dents, holes, joint ridges, texture defects, stains, chalking, peeling, bubbling, and moisture marks. Note the exact location and approximate size of each finding on the worksheet.
  3. Inspect trim, doors, cabinets, and built-ins for gloss, grease, wax, silicone, damage, open joints, loose coatings, and hardware conflicts. Record each finding with its location.
  4. Inspect floors, windows, fixtures, appliances, and adjacent surfaces requiring protection. List every surface that will require protection when Chapter 2 stages the room.

G. Coating Condition and Adhesion Testing

  1. Test existing coating adhesion using the approved method where required. Apply painter's tape firmly to a representative area of the existing coating, press it down, and remove it in one steady motion; record whether the coating remains sound or lifts with the tape.
  2. Identify whether the existing coating is sound, glossy, chalky, stained, contaminated, unknown, or failing. Record one condition category for each inspected surface.

H. Moisture, Structural, and Hazardous-Coating Screening

  1. Identify active leaks, condensation, mold, substrate movement, or corrosion. Use the moisture meter on any surface showing discoloration, softness, or a musty odor.
  2. Stop work until active moisture and structural causes are corrected. Mark the affected area on the worksheet as excluded from this chapter's readiness decision pending correction and reinspection.
  3. Determine whether lead or other hazardous-coating testing is required based on age, location, and condition. Record the structure's approximate age, the condition of the existing coating, and any location factors (window and door surrounds, high-friction areas) that increase hazard-testing priority.
  4. Stop disturbance until hazardous-material clearance is obtained where required. Mark any surface requiring testing as excluded from further physical inspection — visual observation only — until clearance is documented.

I. Stain Classification and System Selection

  1. Identify stains as water, tannin, smoke, grease, rust, ink, marker, or unresolved. Record the probable cause for every stain found in Section F.
  2. Select the required cleaning, patching, sanding, caulking, stain-blocking, priming, and finish-coating systems. Match each identified substrate and defect condition to the system category that addresses it; do not select a single universal system for every surface.
  3. Confirm coating compatibility, sheen, washability, moisture resistance, exterior exposure, and cure requirements. Cross-check the selected systems against the approved finish and color schedule where one was supplied.
  4. Determine sample-board or test-patch requirements. Record which surfaces require an approved sample before full application, per the finish schedule.

J. Estimating, Sequencing, and Readiness Decision

  1. Calculate surface area and estimated material quantities using approved coverage information. Measure and record wall, ceiling, and trim area using the tape measure, and apply the coverage rate stated on the selected product's approved data sheet.
  2. Plan room sequence, ventilation, occupancy controls, drying, and recoat timing. Record the intended order of work and any occupancy or ventilation constraints that later chapters must plan around.
  3. Prepare a deficiency and prerequisite list. List every condition that must be corrected, tested, or cleared before Chapter 2 may begin.
  4. Issue an approved, conditional, or rejected paint-project readiness decision. Approve the room only if every hazard screen is clear; issue a conditional decision listing exact prerequisites if selected areas require correction or testing; reject the plan if stop-work conditions affect the room broadly.

Common Inspection Points

Apply the same checks to every surface in the room regardless of substrate or location.

Complete the Room Inspection Worksheet in the Inspection Checklist section below before beginning Chapter 2.

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Recommended image: a handheld light held low and to the side of a wall, demonstrating the raking-light inspection angle.
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Recommended image: a strip of painter's tape being removed from a test area during an adhesion test, showing a sound versus a failing result.
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Recommended image: a moisture meter placed against a stained wall area during hazard screening.
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Recommended image: a completed Room Inspection Worksheet page showing recorded substrate, defect, and hazard-screen entries.
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Recommended image: side-by-side photographs of a water stain, a tannin stain, and a smoke stain, labeled for classification comparison.

Failure Points and Troubleshooting

Cleanup

This chapter ends with a completed, documented plan retained for the next chapter, not a physical work area to restore.

Field Terms

Normal Light
Standard room lighting used for a first-pass, general-condition inspection.
Raking Light
Light held low and to the side of a surface so it grazes across it, revealing texture defects invisible under normal light.
Substrate
The base material of a surface, identified separately for every surface in the room.
Sound Coating
An existing coating that passes the adhesion test with no lifting, flaking, or removal of material.
Failing Coating
An existing coating that lifts, flakes, chalks heavily, or otherwise fails inspection or testing.
Stop-Work Condition
Any finding that halts further inspection or work on the affected area until it is corrected, tested, or referred to a qualified professional.
Adhesion Test
The tape-based method used to determine whether an existing coating remains bonded to its substrate.
Hazard Screening
The documented review of age, location, and condition factors used to determine whether hazardous-coating testing is required.
Readiness Decision
The documented approved, conditional, or rejected outcome of this chapter's inspection and planning process.
Room Inspection Worksheet
The document recording substrate, defect, condition, and system-selection findings for every surface in the room.

Skill Check

  1. Why must every wall and ceiling scheduled for a new finish coat be inspected under both normal and raking light?
  2. What is the difference between a sound coating and a failing coating, and how is that difference determined?
  3. What must the learner do before scraping, sanding, or otherwise disturbing a coating suspected of containing lead?
  4. What stop-work conditions require the inspection of an area to halt until correction or professional referral, and why?
  5. What are the eight probable-cause categories used to classify a stain, and why does the underlying cause matter more than the stain's appearance?
  6. Why must the material-quantity estimate be based on measured area and the approved product's coverage rate rather than a visual estimate?
  7. What are the three possible outcomes of a readiness decision, and what must accompany a conditional or rejected decision?
  8. Why must every finding be recorded on the worksheet at the point of inspection rather than reconstructed afterward?
  9. What must the learner verify before approving a readiness decision for a pre-1978 structure or a structure with an unknown coating history?
  10. Why does this chapter's plan control the material selections made in Chapter 7, rather than allowing each later chapter to reassess the substrate independently?

Competency Rubric

CompetencyIndependent Pass StandardNot DemonstratedWith AssistanceIndependently
PF-001Inspects every drywall or plaster surface under both normal and raking light and records all defects with location
PF-002Inspects every trim run, door, cabinet, and built-in for gloss, contamination, damage, and hardware conflicts, with findings recorded
PF-003Classifies every recorded stain by probable cause using the eight-category method
PF-004Performs the adhesion test where required and correctly classifies existing coating condition as sound, glossy, chalky, stained, contaminated, unknown, or failing
PF-005Selects a cleaning, patching, sanding, caulking, stain-blocking, priming, and finish-coating system appropriate to each identified substrate and defect condition
PF-006Completes the Room Inspection Worksheet and Hazard-Screening Worksheet in full and issues a documented approved, conditional, or rejected readiness decision

Mark one column per competency. Only Demonstrated Independently awards the competency; Demonstrated with Assistance authorizes additional supervised practice but does not complete the requirement.

Inspection Checklist — Room Inspection Worksheet

SurfaceSubstrateConditionDefects / Stains FoundHazard Screen ResultSelected System
Wall 1
Wall 2
Wall 3
Wall 4
Ceiling
Trim / Doors
Cabinets / Built-ins

Estimated total surface area: ____________     Estimated material quantity: ____________

Readiness decision: ______ (Approved / Conditional / Rejected)     Date: ____________     Inspector name: ____________

Conditional prerequisites or rejection reasons (if any): ______________________________________________

Performance Check

With the entire room inspected and recorded, review the completed Room Inspection Worksheet and Hazard-Screening Worksheet against the Acceptance Standards table and confirm every surface has a recorded substrate and condition, every wall and ceiling scheduled for a new finish coat was inspected under raking light, every applicable hazard-screening item has a recorded result, every stain has an assigned probable cause, and a system has been selected for every identified substrate and defect condition. Issue the readiness decision only after every item is complete. If any item is missing, return to the affected surface, complete the missing step, and record the result before treating the decision as final.

Project Closeout

You have completed the first chapter in the painting and surface finishes sequence: inspecting interior surfaces and planning a paint project. This chapter required you to inspect drywall and plaster surfaces under normal and raking light (PF-001), inspect trim, doors, cabinets, and built-ins for gloss and contamination (PF-002), identify stains and defects by probable cause (PF-003), identify existing coating condition through observation and adhesion testing (PF-004), select an appropriate coating and preparation system (PF-005), and document paint-project readiness with a formal decision (PF-006).

You now have a documented, defensible plan covering every substrate, defect, hazard condition, and required system in the room. That plan carries directly into the next chapter: protecting the room and setting up a controlled work area based on exactly what you found here.

Retain your completed Room Inspection Worksheet, Hazard-Screening Worksheet, and readiness decision. Chapter 2 begins from this exact plan.