The Professional Window Cleaning Process: A Step-by-Step Guide to How Wagon Windows Works

Step 1: Walkthrough and Pre-Service Assessment

Before any cleaning begins, Wagon Windows conducts a walkthrough of the property with the homeowner or, on unoccupied properties, a systematic independent assessment. This step is non-negotiable and sets the entire service up for success. The walkthrough accomplishes several things. First, it identifies access challenges: is the area under each ladder placement stable? Are there irrigation heads, decorative stones, or plantings that require care during approach? Are there second-storey windows with unusual setbacks or architectural features? Second, it identifies special conditions: visible mineral deposits requiring treatment? Post-construction residue? Windows with specialty coatings that preclude standard chemical protocols? Any broken seals in double-pane units that will fog after cleaning (addressing homeowner expectation: a broken seal fogs regardless of how the glass is cleaned—this isn't a cleaning failure)? Third, it confirms scope: which windows are included in the service (all accessible panes, or specific inclusions/exclusions)? Are screens to be cleaned as part of the service or just removed and reinstalled? Are tracks included? Fourth, it notes any pre-existing glass damage that the homeowner should be aware of before cleaning begins—chips, cracks, delaminating film—so that there's no ambiguity about when damage occurred. This walkthrough is documented. Anything noteworthy is noted in the service agreement. Homeowners are informed of any findings that affect scope, pricing, or expected outcome before work begins. This transparency protects both parties and ensures expectations are aligned.

• Access assessment: ladder placement stability, obstacles, architectural complexities
• Special condition identification: mineral deposits, post-construction residue, coated glass
• Scope confirmation: which windows, screens, tracks, and services are included
• Pre-existing damage notation: chips, cracks, broken seals noted before cleaning begins

Step 2: Screen Removal and Organization

Once the walkthrough is complete, screens are removed systematically. This sounds simple—it isn't, at scale. A home with 20 windows has 20 screens, each of which fits one specific window. Screens that appear similar in size often have subtle differences—a millimetre difference in height or width, a screen with a different mesh gauge installed in a particular window, or a screen with a repair that the homeowner knows about and wants kept in a specific location. Installing the wrong screen in the wrong window means either a screen that doesn't seat properly (creating an insect-entry gap) or a screen forced into place (bowing the frame). Wagon Windows removes screens in a documented sequence, marking or organizing them by window position before moving on. The organization system ensures every screen goes back to its original location. This seems like overhead—it is, but it prevents a problem that generates complaints in operations that don't do it. During removal, screens are inspected for damage: mesh tears, spline condition, frame bowing, corrosion. Any findings are communicated to the homeowner. Screens with significant damage are flagged for replacement discussion rather than silently reinstalled. Removed screens are placed in a safe, organized location away from the working area—not leaning against the wall where a ladder could knock them, not in the path of water runoff from cleaning.

Step 3: Dry Debris Removal and Pre-Rinse

Before any cleaning solution touches the glass, dry debris is removed. This step is skipped by under-equipped operators, and its absence is felt in the result. Dry debris on exterior glass includes: spider webs and insect carcasses at frame corners, loose cottonwood fibres, pollen dust, bird droppings that haven't been moistened, and any dry soil from splash-back at lower panes. When cleaning solution is applied to glass that hasn't been dry-cleared, this debris becomes wet debris—it smears across the glass during the T-bar application stroke, redistributing rather than removing it. A soft brush (a natural-bristle brush or professional glass-detailing brush) clears webs and insect material from frame corners and the glass surface. A dry microfibre pass removes loose pollen and dust. On panes with significant cottonwood accumulation, a more deliberate dry brush pass removes as much fibre as possible before moisture is introduced. Bird droppings deserve specific attention. Fresh or recently-moistened droppings are acidic—they actively etch glass if allowed to dwell and are also corrosive to certain frame coatings. Dried droppings require pre-softening with water before they can be removed without abrasion risk. The pre-rinse step—a light water mist or wet cloth applied to dried droppings—allows them to soften while the dry brush work continues on other windows. For homes with significant organic debris (under trees, near bird nesting areas), the dry-debris step takes proportionally longer than on a cleaner home. It's time well spent: rushing past it produces inferior glass results.

Steps 4–6: Solution Application, Squeegee, and Edge Detailing

With dry debris removed and any softening done, the active cleaning sequence begins. This three-step sequence—solution, squeegee, detail—is repeated on every pane. Solution application via T-bar: the sleeve, saturated with cleaning solution at the appropriate concentration for local water hardness, is applied to the glass in full-coverage strokes. The solution is spread evenly and allowed a brief dwell—typically 15–30 seconds on standard glass, longer on panes with mineral deposit concerns. During dwell time, the solution breaks down surface tension, penetrates mineral deposits, and loosens organic debris. Squeegeeing: the rubber squeegee is pulled across the glass using the single-pass technique appropriate for the pane size and orientation. For small or divided-light windows, straight horizontal pulls are most controlled. For large architectural windows, the fan technique or straight vertical pulls are used depending on orientation. Each stroke overlaps the previous by approximately half an inch to capture any water that crept past the blade edge. The blade is checked and flipped if any chattering or inconsistency in the pull is noticed. Edge detailing: after each pane is squeegeed, a lint-free cloth is used to remove the water bead at the frame perimeter. The cloth is pressed to the edge with a knuckle or folded finger, drawing down and across each side of the frame. The detailing cloth is refolded to a clean section after every two or three panes to ensure a dry surface is always in contact with the glass. A wet detailing cloth smears rather than absorbs—it's one of the most common causes of frame-edge residue that homeowners notice in oblique light.

• Solution at calibrated concentration for Shuswap water hardness—never standard dilution without water assessment
• Dwell time extended on mineral deposit situations—not rushed to the next step
• Squeegee rubber checked and flipped if chatter develops—blade quality is maintained during the job
• Detailing cloth refolded to dry section every 2–3 panes—wet cloth smears, dry cloth absorbs

Steps 7–10: Interior Cleaning, Screen Reinstall, and Final Inspection

For full interior-exterior services, the interior cleaning follows the exterior sequence using the same T-bar, squeegee, and detailing approach—with the additional care required for working in occupied living spaces. Drop cloths at sill lines, immediate drip management, and communication about anything moved near windows are standard interior protocol. Screen reinstallation follows interior cleaning. Screens are returned to their documented positions, seated fully in the track channel, and tested for proper engagement—pressed at corners to confirm the frame seats without bowing or gap. Any screen that doesn't seat properly is flagged immediately rather than forced. The final inspection is a walk-around assessment of every cleaned window. Each pane is viewed from multiple angles in available light—including oblique viewing that reveals any residual haze, streaking, or edge water lines not visible from straight-on. Any pane that doesn't meet standard is re-cleaned on the spot. Photographic documentation is taken of any pre-existing damage noted during the initial walkthrough, and of the completed work where appropriate. This documentation protects both the cleaner (clear record of pre-existing conditions) and the homeowner (confirmation of completion and condition). The service agreement records what was completed, any findings communicated during the job, and any follow-up recommendations (screens needing replacement, tracks needing separate service, broken seals that should be addressed). This paper trail means there's no ambiguity about what was done and what was communicated. Wagon Windows doesn't leave a job until the inspection is complete and the homeowner (where present) is satisfied. Call (403) 837-5092 or visit wagonwindow.com to schedule. Residential exterior from $169.