Exterior Window Cleaning
Professional exterior glass cleaning — the foundation of every window service
Exterior window cleaning is the most-requested window service and the one that makes the most visible difference to curb appeal and natural light. Professional exterior cleaning removes pollen, mineral deposits, bird droppings, and environmental grime that builds up on glass over months and bonds tightly enough that standard garden-hose rinsing can't remove it. Done with the right technique and tools — purified water, professional squeegees, and appropriate cleaning solution — results are streak-free in a way that DIY cleaning rarely achieves.
What Exterior Window Cleaning Includes
A professional exterior window cleaning should include all of the following. Confirm scope before booking:
- Full exterior glass cleaning on all accessible windows using professional squeegee technique
- Frame and sill wipe-down to remove accumulated dirt and prevent debris from running back onto clean glass
- Screen removal (where applicable) for cleaning or to allow direct glass access
- Scraping of stubborn deposits — bird droppings, paint overspray, or sap — with a razor blade if needed
- Final detail wipe of edges and corners to remove any water tracks
Why Professional Results Differ from DIY
The main reason DIY window cleaning leaves streaks is that consumer glass cleaners contain surfactants that dry unevenly and leave residue. Professional window cleaners use purified (zero-mineral) water that leaves no deposits when it dries, combined with a professional squeegee technique that removes all moisture in a single controlled pass.
On hard water or mineral-coated glass, a pre-treatment step dissolves mineral bonds before cleaning — something standard household spray products can't accomplish. The result is glass that stays cleaner longer, since residue-free surfaces don't attract airborne particles as quickly.
Signs You're Overdue for Exterior Cleaning
You may be used to how your windows look, but compare them to these benchmarks:
- A faint milky or hazy film visible when light strikes the glass at a low angle
- White or chalky spots from mineral-laden water (sprinklers, rain runoff) that don't wipe off
- Visible pollen or dust coating that hasn't improved after rain
- Yellow or brown staining from organic matter (tree sap, tannins, bird droppings)
- Reduced natural light indoors despite clear weather outside
What to Ask When Hiring a Pro
A few questions that reveal whether you're dealing with a quality operator:
- Do you use purified/deionized water or standard tap? (Purified water prevents new mineral deposits)
- Is frame and sill cleaning included or extra?
- How do you handle screens — remove, clean separately, or clean in place?
- Are you licensed and insured? (Request a COI for any work above ground level)
- Do you guarantee streak-free results?
Frequently Asked Questions
How long does exterior window cleaning take?
A typical single-story home with 15–20 windows takes 1–1.5 hours. A two-story home with 25–35 windows takes 2–3 hours. Homes with many divided-light or French-pane windows take longer due to the increased number of individual glass sections.
How often should exterior windows be cleaned professionally?
Twice a year is the standard recommendation for most homes — once in late spring after pollen season and once in fall. Homes near the ocean, busy roads, or with heavy tree coverage may benefit from three to four times per year. Commercial storefronts often need monthly service.
Will cleaning damage my window seals or frames?
Professional cleaning with appropriate pressure and technique does not damage window seals or frames. High-pressure washing can force water into frame gaps and damage seals — professional window cleaners use low-pressure water and squeegee technique, not pressure washing equipment.
Can hard water stains be removed with exterior cleaning?
Light mineral deposits are removed during a standard cleaning. Heavy hard water staining — particularly from sprinkler systems that have hit the glass repeatedly — requires a mineral deposit treatment as a separate step, usually priced as an add-on. Severe etching that has penetrated the glass surface may require professional glass restoration.
Do I need to be home for exterior window cleaning?
For exterior-only cleaning, you generally don't need to be present — the crew works around the outside of the house. Exceptions include gated properties, dogs in the yard, or specific access issues. Communicate any constraints when booking.
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