“Do you clean both sides?” is one of the first questions we get asked, and it’s a fair one. A lot of homeowners assume window cleaning is window cleaning — someone shows up, wipes the glass, and leaves. In reality, interior and exterior cleaning are two fairly different jobs, with different tools, different access challenges, and different things included in the scope of work. Not understanding that difference is exactly how homeowners end up disappointed by a service that technically did what was booked, just not what they pictured.
This guide breaks down what’s actually involved in each side of the job, what typically gets included versus what’s considered an add-on, and how to figure out which one your home actually needs.
Why the Two Sides Aren’t the Same Job
Exterior glass deals with weather, pollution, pollen, and hard water spotting from rain and sprinklers. It’s exposed to the elements every single day, which means grime builds up steadily regardless of how careful anyone in the household is. Interior glass, on the other hand, is shaped by what happens inside the home — cooking residue drifting onto kitchen windows, fingerprints near door handles, pet nose prints at eye level, condensation buildup near bathrooms.
Because the source of the dirt is different, the cleaning approach is different too. Exterior work often involves a hose, extension poles, ladders, or specialized water-fed pole systems for upper floors. Interior work is done from inside with a squeegee and cloth, working around furniture, blinds, and curtains rather than weather and height.
What’s Typically Included in Exterior Cleaning
Exterior window cleaning generally covers:
- The glass itself, washed and squeegeed to remove dirt, pollen, hard water spotting, and general grime
- Window frames and sills, wiped down to clear dust and debris that collects in the tracks
- Screens, either wiped in place or removed, rinsed, and reinstalled depending on the condition
- Second and third-storey glass, accessed safely with extension poles or water-fed systems rather than relying on ladders against the house
Exterior cleaning is usually the more physically involved half of the job, since it requires working around landscaping, uneven ground, height, and weather conditions that interior cleaning simply doesn’t have to deal with.
What’s Typically Included in Interior Cleaning
Interior window cleaning generally covers:
- The glass, cleaned and squeegeed from inside, with attention to corners and edges a cloth alone tends to miss
- Interior sills and tracks, wiped to remove dust, pet hair, and general household buildup
- Interior screens, if accessible without removing storm windows or other fixed panels
Interior work tends to move faster per window since there’s no ladder setup, weather delay, or height consideration involved, but it requires more care around furniture, floors, and window treatments like blinds or curtains that need to be moved and put back carefully.
What’s Usually NOT Included (And Why)
A few things commonly get assumed as part of standard window cleaning but typically fall outside the base service unless specifically requested:
- Deep screen restoration, such as re-meshing torn screens rather than just cleaning existing ones
- Storm window removal and reinstallation, which is a separate task from cleaning the primary window
- Skylight cleaning, since access and safety requirements differ significantly from standard windows
- Hard water stain treatment for heavily built-up mineral deposits, which often needs a dedicated treatment pass beyond a standard clean
- Post-construction cleanup, where paint, caulking residue, or construction dust require a different process entirely than routine maintenance cleaning
None of this means these services aren’t available — most professional window cleaning companies, including Peach Windows, offer them — but they’re usually treated as an additional scope rather than assumed to be bundled into a standard interior or exterior clean. Knowing this upfront helps you ask the right questions when booking, rather than being surprised later.
Do You Need Both, or Just One?
This depends entirely on what’s actually bothering you about your windows.
If your main concern is curb appeal — how the house looks from the street, or how clear the view is looking outward — exterior-only cleaning usually solves it, since that’s the side exposed to weather and the one most visible from outside.
If your concern is more about what you notice day to day inside the home — smudges near a reading nook, a hazy kitchen window above the sink, fingerprints on a sliding door — interior cleaning addresses that directly, often at a lower cost than a full interior-and-exterior visit.
If it’s been a long time since either side has been properly cleaned, or you’re preparing your home for a major event, sale, or seasonal deep clean, doing both together makes the most sense. Grime accumulates on both sides independently, and a home only looks fully finished when both are addressed at the same time.
A Common Misconception Worth Clearing Up
Many homeowners assume that if the outside of their windows looks clean, the inside must be reasonably clean too, or vice versa. In practice, the two sides age at completely different rates because they’re exposed to entirely different environments. It’s common for a home to have spotless-looking exterior glass from recent rain while the interior has a noticeable film from months of cooking and daily use, or the reverse, where interior glass looks fine but the exterior is covered in pollen and hard water spotting that’s only obvious up close.
This is worth keeping in mind when deciding what to book, especially if you’re only looking at your windows from one side, like glancing out from inside the house, and assuming that reflects the condition of the glass as a whole.
How Professionals Decide the Right Approach for Your Home
At Peach Windows, we typically walk through a property before recommending interior-only, exterior-only, or a combined clean, since the right scope really does depend on the specific home — how exposed it is to weather, how much interior activity happens near the windows, and how long it’s been since the last proper clean on either side. A home near a construction site might need heavier exterior attention regardless of how the interior looks, while a home with young kids or pets might need more frequent interior touch-ups than the exterior ever requires.
Frequently Asked Questions
Is exterior cleaning always more expensive than interior? It’s usually more labour-intensive due to access requirements like ladders, poles, or water-fed systems, particularly for multi-storey homes, so it often does involve more work than interior cleaning on the same window.
Can I book just one side if that’s all I need? Yes. Interior-only and exterior-only cleaning are both standard options, and there’s no requirement to book both together if only one side needs attention.
Why does my interior glass get dirty faster than I’d expect? Cooking, humidity from showers, pet activity, and general household use all contribute to interior grime faster than most people assume, especially on kitchen and bathroom windows.
Do screens need to be cleaned separately from the glass? Yes, screens collect their own layer of dust and debris that’s separate from the glass behind them, and are typically wiped or rinsed as part of a thorough exterior clean.
The Bottom Line
Interior and exterior window cleaning solve two different problems, driven by two different sources of grime, and understanding what’s actually included in each helps you book the right service the first time rather than being surprised by what wasn’t covered. Whether you need one side or both really comes down to what’s specifically bothering you about your windows and how long it’s been since either side was last properly addressed.
Peach Windows offers both interior and exterior cleaning across the Greater Toronto Area, and we’re happy to walk through your specific home to recommend the right scope rather than a one-size-fits-all package. Reach out to Peach Windows to figure out exactly what your windows need.
