Practical Trades Manual Series
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Book 22 — Property Maintenance and Building Inspection: Preventive Maintenance, Condition Assessment, and Repair Planning

Project 07

Inspect Windows, Doors, Weatherstripping, and Air Leaks

Inspect accessible exterior windows and doors for safe operation, water-management conditions, weatherstripping, locks, latches, visible air leakage, and maintenance priorities, and produce a room- and elevation-based opening inspection record.

Field Cue System

These cues appear at the point of work. They identify safety, access, code, manufacturer, and documentation issues before they become missed hazards or unusable records.

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Safety Cue

Task-specific guidance for ordinary window and door inspection hazards.

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Critical Safety Cue

An immediate egress, fall, or security hazard is possible at an opening.

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Field Safety Cue

Practical operating safety: sash support, glass condition, and child-safety devices.

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Code Alert

Egress, rated assemblies, and security requirements vary. Verify before proceeding.

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Manufacturer Cue

Follow product-specific instructions for window and door hardware, balances, and screening tools.

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Documentation Cue

Guidance on recording operation results, water evidence, and air-leak priority separately from repair boundaries.

Job Overview

This project qualifies you to inspect every accessible exterior window and door in a residence and produce a room- and elevation-based record of operation, water-management condition, weatherstripping, locks, latches, and visible air leakage. The finished work product is a single written record: an opening-by-opening inventory that separates safe, verified operation from conditions requiring service, and separates serviceable weatherstripping repair from conditions requiring frame, flashing, or replacement work.

You will review known drafts, leaks, condensation, and prior repairs; identify openings with egress, fire, security, accessibility, or emergency-rescue functions; inspect exterior and interior water-management details at each opening; operate each approved window and door through its normal functions; inspect weatherstripping and hardware; screen for visible air leakage using only approved non-destructive methods; and record every opening with a priority and a recommended next action.

This project builds directly on the Chapter 1 baseline walkthrough and the Chapter 5 envelope inspection, both of which identified openings as part of a wider exterior review. It supplies the service list that Chapter 8 uses to complete minor door and hardware maintenance, and it feeds the Chapter 19 repair-priority plan and the Chapter 20 capstone.

Skills You Will Demonstrate

  • MI-037 — Inspect window operation, including opening, closing, locking, and support functions, for every approved accessible window.
  • MI-038 — Inspect door operation, including drag, sag, latch resistance, threshold contact, and closer action, for every approved accessible exterior door.
  • MI-039 — Identify failed weatherstripping by compression, continuity, brittleness, tearing, displacement, and missing sections.
  • MI-040 — Identify drafts and visible air leakage using approved non-destructive screening methods at common leakage paths.
  • MI-041 — Inspect locks and latches for secure, non-forced engagement at every approved opening.
  • MI-042 — Document air-sealing priorities that separate minor weatherstripping service from conditions requiring frame, flashing, or enclosure work.

Where This Skill Fits

This project follows the Chapter 5 siding, trim, flashing, and sealant inspection, which already identified window and door head, sill, and trim conditions as part of the exterior envelope. Chapter 7 returns to those same openings from the inside and outside together, adding operation, security, weatherstripping, and air-leak findings that Chapter 5's exterior-only review did not cover.

The service list you create here is used directly in Chapter 8, which completes minor hinge, latch, lock, weatherstripping, sweep, and sealant service on one selected door. Findings that exceed minor maintenance — insulated-glass failure, structural frame movement, exterior flashing correction, or rated-assembly work — are carried forward as referrals into the Chapter 19 repair-priority plan and, where the property is used as the capstone, into Chapter 20.

Scope and Intended Use

This project covers:

  • reviewing known drafts, leaks, condensation, security concerns, and prior adjustment or replacement history for each opening
  • identifying openings with egress, fire, security, accessibility, storm-protection, or emergency-rescue functions
  • inspecting exterior and interior water-management details at heads, jambs, sills, thresholds, trim, and visible drainage paths
  • operating each approved window and door through normal opening, closing, locking, and support functions
  • inspecting weatherstripping, sweeps, thresholds, hinges, and lock hardware for condition and secure engagement
  • screening for visible air leakage using visual, hand-feel, tissue-strip, or other approved non-destructive methods
  • producing one room- and elevation-based opening inspection record with operation results, water evidence, weatherstripping condition, air-leak priority, and recommended next action for every opening

This project does not authorize the learner to:

  • operate a window or door that is broken, painted shut, severely distorted, or otherwise unsafe until it receives qualified evaluation
  • seal window weeps, sill drainage, door threshold drainage, or any other intentional ventilation or drainage opening
  • use open flame or uncontrolled smoke sources to detect air leakage
  • remove trim, dismantle frames, or perform any repair beyond visual and operational inspection within this chapter's scope
  • diagnose insulated-glass seal failure, structural frame movement, or concealed flashing condition from appearance alone

Any opening presenting an immediate egress, fall, or security hazard must stop routine inspection of that opening and be handled per this chapter's Critical Safety Cue before the inspection continues.

Reference Conventions

Establish these references before the opening inspection begins, and do not change them mid-inspection.

TermDefinition
Opening identifierA unique code tied to a specific room, elevation, and opening, assigned to every window and door inspected
Egress openingA window or door identified as serving a required emergency-escape or rescue function
Operation resultA recorded observation of whether an opening moves, locks, and latches through its normal functions without excessive force or unsafe behavior
Water evidenceVisible staining, swelling, decay, or moisture at an opening's head, jamb, sill, threshold, or interior finish
Air-leak priorityA classification of visible or felt air movement at an opening as serviceable through weatherstripping or requiring broader trim, frame, or flashing work
Opening Inspection WorksheetThe single dated document recording every opening's operation, lock and weatherstripping condition, water evidence, air-leak priority, and recommendation from this inspection

Scope and Authorization Record

Before beginning the opening inspection, record the following directly on the Opening Inspection Worksheet:

Property address: ______________________     Owner/authorized contact: ______________________

Openings excluded from operation and reason: ______________________

Date: ____________     Time started: ____________     Weather: ____________     Interior/exterior temperature: ____________

Inspector name: ____________

Prerequisites

Common Field Fundamentals

Every opening in this chapter receives the same four-part review: water-management inspection at the frame, operation of locks and moving parts, weatherstripping and hardware condition, and an air-leak priority screening. Recording these four parts separately, for every opening, is what allows Chapter 8 to select a correct and limited service scope later.

Exterior frame detailsHead, jamb, sill, threshold, trim, flashing, sealant, and visible drainage paths
Glass and frame conditionCracks, impact damage, fogging, seal-failure indicators, decay, corrosion, and coating failure
Operation and hardwareOpening, closing, locking, latching, balances, hinges, closers, and support functions
Weatherstripping and air leaksCompression, continuity, brittleness, tearing, and common leakage paths at joints and gaps
Interior evidenceStains, condensation, peeling paint, swelling, mold-like growth, and floor damage at openings
DocumentationOpening identifier, operation result, water evidence, air-leak priority, and recommendation

Operation Versus Repair Boundary

Record whether an opening operates within normal effort and record any drag, sag, binding, or resistance as an observation. Do not force a binding window or door, and do not conclude that resistance alone requires frame repair; many resistance findings are corrected by the minor hinge, latch, or weatherstripping service in Chapter 8. Reserve the "requires broader repair" classification for frame decay, structural distortion, insulated-glass failure, or damage visible at the time of this inspection.

MI-037 – MI-042

Inspection / Documentation Qualification

Inspect Windows, Doors, Weatherstripping, and Air Leaks

Difficulty: Beginner–Intermediate

Estimated Time: 3–5 hours

Estimated Cost: $0–$30

Finished Work: One room- and elevation-based opening inspection record with operation, water, weatherstripping, and air-leak findings for every accessible window and door

A. Finished-Project Specification

Scope: one complete, non-destructive inspection of every accessible exterior window and door in one residence, covering exterior water-management details, glass and frame condition, operation, weatherstripping and hardware, and visible air leakage, producing one opening inspection record.

B. Opening Inspection Route Schedule

SegmentAreas CoveredPrimary Purpose
Exterior frame reviewHead, jamb, sill, threshold, trim, flashing, sealant, and visible drainage paths at each openingEstablish water-management condition independent of operation
Glass and frame conditionCracks, impact damage, fogging, seal-failure indicators, decay, corrosion, coating failureIdentify conditions affecting safety, water resistance, and service boundary
Operation and hardwareOpening, closing, locking, latching, balances, hinges, closers, screens, and child-safety devicesConfirm safe normal operation without dismantling
Weatherstripping and air-leak screeningCompression, continuity, brittleness, tearing, and common leakage paths at joints and gapsSeparate serviceable weatherstripping from broader air-sealing needs
Interior evidenceStains, condensation, peeling paint, swelling, mold-like growth, floor damage near openingsCorrelate interior symptoms with exterior and operational findings

C. Records and Reference Takeoff

  • Records to review before inspection: known drafts, leaks, condensation, security concerns, difficult operation, prior adjustments, and window or door replacement history.
  • Opening Inspection Worksheet: one copy, used to record every opening's identifier, type, operation, lock status, weatherstripping condition, water evidence, air-leak priority, and recommendation.
  • Service list: maintained alongside the worksheet, separating cleaning, lubrication, minor adjustment, weatherstripping, sealant, hardware, frame repair, flashing repair, and replacement.

D. Acceptance Standards

CheckStandard
Route coverageEvery accessible exterior window and door is inspected in the defined four-part sequence
Egress identificationEvery opening with an egress, fire, security, accessibility, or emergency-rescue function is identified before operation
Operation record completenessEvery approved opening's operation result is recorded, including drag, sag, latch resistance, and support condition where applicable
Water evidence recordedExterior frame condition and interior water evidence are recorded independently of the operation result
Air-leak screeningOnly visual, hand-feel, tissue-strip, or other approved non-destructive methods are used; no open flame or uncontrolled smoke appears in the record
Priority classificationEvery opening is classified with a recommendation limited to cleaning, lubrication, minor adjustment, weatherstripping, sealant, hardware, frame repair, flashing repair, or replacement

E. Preparation — Records, Egress Identification, and Route Planning

  1. Review known symptoms and history. Record known drafts, leaks, condensation, security concerns, difficult operation, prior adjustments, and window or door replacement history for the property.
  2. Identify functional openings. Identify every opening with an egress, fire, security, accessibility, storm-protection, or emergency-rescue function before beginning operation.
  3. Exclude unsafe openings from operation. Exclude unsafe, broken, painted-shut, severely distorted, or specialty openings from operation until qualified evaluation, and record the reason for exclusion.
  4. Photograph exterior and interior conditions. Photograph representative and defective openings at both the exterior frame and the interior side before close inspection.

F. Exterior Frame and Glass Inspection

  1. Inspect exterior frame details. Inspect head, jamb, sill, threshold, trim, flashing, sealant, weeps, drainage paths, and cladding transitions at each opening.
  2. Do not seal intentional drainage. Do not seal window weeps, sill drainage, door threshold drainage, or intentional ventilation openings during this inspection.
  3. Inspect glass condition. Inspect glass for cracks, impact damage, failed glazing, fogging, seal-failure indicators, and loose stops.
  4. Inspect frame and sash or slab condition. Inspect frames and sashes or slabs for decay, corrosion, swelling, delamination, distortion, loose components, and coating failure.

G. Operation, Hardware, and Lock Inspection

  1. Operate each approved window. Operate through normal opening, closing, locking, and support functions only when safe.
  2. Verify sash support. Confirm sashes remain supported and do not fall, bind dangerously, or disengage during operation.
  3. Inspect window hardware. Inspect balances, cranks, hinges, rollers, tracks, locks, limiters, screens, and child-safety devices without dismantling them.
  4. Operate each approved exterior door. Record drag, sag, latch resistance, threshold contact, closer action, and required force qualitatively.
  5. Inspect door hardware. Inspect hinges, frame, jamb, slab, threshold, sweep, lockset, deadbolt, strike, closer, and security hardware.
  6. Verify secure lock and latch engagement. Confirm locks and latches engage without lifting, slamming, or excessive force.

H. Weatherstripping, Air-Leak Screening, and Interior Evidence

  1. Inspect weatherstripping condition. Inspect for compression, continuity, brittleness, tearing, displacement, paint adhesion, and missing sections.
  2. Inspect sweeps and thresholds. Inspect door sweeps and thresholds for contact, drainage, wear, and floor clearance.
  3. Screen for air leakage using approved methods only. Use visual, hand-feel, tissue-strip, or other approved non-destructive method under safe and suitable conditions, and never use open flame or uncontrolled smoke.
  4. Check common leakage paths. Inspect operable joints, meeting rails, pulley pockets, trim gaps, recessed hardware, penetrations, and rough-opening transitions.
  5. Classify the leakage source. Distinguish leakage through serviceable weatherstripping from leakage requiring trim removal, frame repair, flashing correction, or broader enclosure work.
  6. Inspect interior evidence. Inspect interior stains, condensation, peeling paint, swelling, mold-like growth, and floor damage related to each opening.

I. Classification and Recordkeeping

  1. Identify priority conditions. Classify unsafe egress, broken glass, unsecured doors, falling sash, failed lock, active water entry, and severe frame decay as priority items.
  2. Refer conditions beyond this chapter's scope. Refer insulated-glass failure, structural frame movement, exterior flashing, replacement windows, rated doors, and high-security work as required.
  3. Record every opening. Record location, type, operation, lock status, weatherstripping condition, water evidence, air-leak priority, photograph, and recommendation.
  4. Create the service list. Separate cleaning, lubrication, minor adjustment, weatherstripping, sealant, hardware, frame repair, flashing repair, and replacement into distinct categories.
  5. Update the property log. Identify openings to be serviced in Chapter 8 and file the completed opening inspection record.

Common Opening Inspection

Review every opening using the same checks regardless of which segment of the route it came from.

Complete the Opening Inspection Worksheet in the Inspection Checklist section below before selecting a door for Project 08.

Image Placeholder
Recommended image: the exterior head, jamb, and sill of a window photographed together before operation testing begins.
Image Placeholder
Recommended image: an inspector operating a window through its full approved travel while confirming sash support.
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Recommended image: a tissue strip held at a door's weatherstripping to screen for visible air movement.
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Recommended image: interior condensation or staining evidence photographed at a window sill or door threshold.
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Recommended image: a completed Opening Inspection Worksheet entry showing identifier, operation result, and recommendation.

Failure Points and Troubleshooting

Cleanup

This project ends with a filed opening inspection record, not a set of loose notes.

Field Terms

Opening Identifier
A unique code tied to a specific room, elevation, and opening, assigned to every window and door inspected.
Egress Opening
A window or door identified as serving a required emergency-escape or rescue function.
Operation Result
The recorded observation of whether an opening moves, locks, and latches through its normal functions without excessive force or unsafe behavior.
Water Evidence
Visible staining, swelling, decay, or moisture at an opening's head, jamb, sill, threshold, or interior finish.
Air-Leak Priority
A classification of visible or felt air movement at an opening as serviceable through weatherstripping or requiring broader trim, frame, or flashing work.
Common Leakage Path
An operable joint, meeting rail, pulley pocket, trim gap, recessed hardware location, penetration, or rough-opening transition where air movement is commonly detected.
Opening Inspection Worksheet
The single dated document recording every opening's operation, lock and weatherstripping condition, water evidence, air-leak priority, and recommendation from this inspection.
Service List
The categorized list separating cleaning, lubrication, minor adjustment, weatherstripping, sealant, hardware, frame repair, flashing repair, and replacement needs identified across all openings.
Referral Condition
A finding, such as insulated-glass failure or structural frame movement, that exceeds this chapter's minor-maintenance scope and requires a qualified professional.

Skill Check

  1. Why must egress, fire, security, accessibility, and emergency-rescue openings be identified before any opening is operated?
  2. What must the inspector do before releasing a window sash during operation testing?
  3. Why must water evidence be recorded independently of the operation result for the same opening?
  4. What methods are approved for air-leak screening, and what methods are prohibited?
  5. What is the difference between leakage requiring minor weatherstripping service and leakage requiring broader trim, frame, or flashing work?
  6. What four observations must be recorded for every opening on the Opening Inspection Worksheet?
  7. Under what conditions must an opening be excluded from operation, and how must that exclusion be documented?
  8. What must the inspector do upon finding an unsafe egress, fall, or security hazard at an opening?
  9. Why must a window guard or window opening control device never be defeated to test full window travel?
  10. What service categories must every opening's recommendation be limited to, and why does this list matter for Chapter 8?

Competency Rubric

CompetencyIndependent Pass StandardNot DemonstratedWith AssistanceIndependently
MI-037Inspects window operation, including opening, closing, locking, and support functions, for every approved accessible window
MI-038Inspects door operation, including drag, sag, latch resistance, threshold contact, and closer action, for every approved accessible exterior door
MI-039Identifies failed weatherstripping by compression, continuity, brittleness, tearing, displacement, and missing sections
MI-040Identifies drafts and visible air leakage using only approved non-destructive screening methods at common leakage paths
MI-041Inspects locks and latches for secure, non-forced engagement at every approved opening
MI-042Documents air-sealing priorities that correctly separate minor weatherstripping service from conditions requiring frame, flashing, or enclosure work

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 — Opening Inspection Worksheet

Opening IDRoom / Elevation / TypeOperation ResultLock / Weatherstripping ConditionWater EvidenceAir-Leak PriorityRecommendation
W-01
W-02
D-01
D-02
005

Openings excluded from operation: ____________________________________________________

Immediate egress/security hazards reviewed with responsible party: ______ (Yes/No/None Found)     Date/Time: ____________

Opening inspection declared complete: ______ (Pass/Fail)     Date: ____________     Inspector name: ____________

Performance Check

With the opening inspection complete, review the finished worksheet against the Acceptance Standards table and confirm every accessible window and door was inspected in the defined sequence, every egress, fire, security, accessibility, or emergency-rescue opening was identified before operation, every approved opening's operation result is recorded, water evidence and air-leak priority are recorded separately from the operation result, no air-leak entry references an unapproved screening method, and every recommendation is limited to one of the defined service categories. Correct any incomplete entry before selecting a door for Project 08.

Project Closeout

You have completed the seventh project in the property maintenance and building inspection sequence: inspecting windows, doors, weatherstripping, and air leaks. This project required you to inspect window operation (MI-037), inspect door operation (MI-038), identify failed weatherstripping (MI-039), identify drafts using approved methods (MI-040), inspect locks and latches (MI-041), and document air-sealing priorities (MI-042).

You now have a complete, room- and elevation-based opening inspection record and a categorized service list that separates minor maintenance from professional referral. This record carries directly into the next project: servicing one selected door's hinges, locks, and weatherstripping within the approved minor-maintenance scope.

File your completed Opening Inspection Worksheet, photographs, and service list where they can be retrieved for Chapter 8. You will select one door from this record to service in the next project.