Insurance, pricing red flags, the right questions to ask, and what separates a good window cleaner from a great one.
Hiring the wrong window cleaning company can cost you more than a streaky finish. Scratched glass, damaged window frames, broken seals, water inside your walls. It happens more often than you'd think. And if the company isn't insured? You're paying for the repairs out of pocket.
Toronto has hundreds of window cleaning companies. Some are excellent. Some are a guy with a bucket and a Kijiji ad. This guide will help you tell the difference before you hand over your money.
Windows are one of the most expensive components of your home. A single large picture window can cost $800 to $2,000 to replace. Tempered glass, Low-E coatings, and argon-filled double panes are not cheap.
Bad technique causes real damage. Using the wrong tools can scratch glass permanently. Applying too much pressure on older frames can crack the glazing. Using tap water with high mineral content leaves white deposits that bond to the glass over time. And if someone falls off a ladder at your house without insurance, you could be liable.
The right company protects your investment. The wrong one puts it at risk.
This is non-negotiable. Any company cleaning your windows should carry commercial general liability insurance. Ask for a Certificate of Insurance (COI). If they can't produce one, or they say "we're covered under personal insurance," walk away. Personal insurance does not cover commercial work at your property.
Check Google, HomeStars, and Facebook. Look for consistency, not perfection. A company with 50 reviews and a 4.7 average is more trustworthy than one with 5 reviews and a perfect 5.0. Read the negative reviews carefully. How did the company respond? That tells you more than any marketing will.
A good company gives you a clear quote before any work starts. That quote should include exactly what's covered: which windows, interior or exterior or both, frames, sills, tracks, screens. If a company won't give you a number in writing, they'll surprise you with the invoice. Check out our Scarborough pricing guide for an example of what transparent pricing looks like.
The biggest difference in equipment is water quality. Companies using purified water (also called deionized or DI water) deliver a dramatically better result. Purified water has all dissolved minerals removed. When it dries on glass, it leaves zero residue. Tap water leaves mineral deposits that cause streaks and spots.
Windows cleaned with purified water stay cleaner 2 to 3 times longer. This is not marketing. It's chemistry.
Also look for water-fed pole systems for upper floors. They're safer than ladders and deliver a more consistent finish.
What happens if you're not happy? A confident company guarantees their work. Look for specific language: "We'll redo it free" is good. "100% satisfaction or you don't pay" is even better. Vague promises like "we stand behind our work" mean nothing without specifics.
How quickly does the company respond to your inquiry? If it takes 3 days to answer a quote request, imagine how long it'll take to schedule the actual job. In 2026, most good companies respond within a few hours. Same-day response is the standard for premium service.
This includes everything from branded uniforms to showing up on time to leaving the work area clean. Do they have a real website? A real phone number? Do they communicate clearly about scheduling, access requirements, and timing? Professionalism up front predicts quality on the job.
| Feature | Budget ($79 to $149) | Mid-Range ($149 to $299) | Premium ($249 to $500+) |
|---|---|---|---|
| Insurance | Often none | Usually yes | Always yes, COI on request |
| Water type | Tap water | Varies | Purified / deionized |
| Frames, sills, tracks | Extra charge or skipped | Usually included | Always included |
| Screen cleaning | Not included | Sometimes | Always included |
| Guarantee | None | Redo if notified same day | Full redo or you don't pay |
| Response time | 1 to 3 days | Same day | Under 2 hours |
| Online reviews | Few or none | 4.0+ average | 4.5+ with detailed responses |
| Results last | 2 to 4 weeks | 4 to 8 weeks | 8 to 12+ weeks |
We built MANTLE around the things Toronto homeowners told us they wanted but couldn't find in one company. Here's where we land on each factor:
We're a new company launching in April 2026. But we back everything with the strongest guarantee in the GTA because we know we'll deliver. Visit our reviews page for testimonials from homeowners we've worked with.
Ask for a Certificate of Insurance (COI). Any legitimate company will provide one within 24 hours. If they hesitate, dodge the question, or say they don't have one, walk away. MANTLE carries full commercial general liability insurance and provides proof on request.
For a standard 2-storey detached home in Toronto, exterior window cleaning costs $249 to $400. Interior + exterior runs $399 to $600. Prices vary by number of windows, accessibility, and condition. Be cautious of quotes under $100 for a full home.
Yes. Purified water has all minerals removed, so it leaves zero residue on your glass. Traditional tap water and squeegee methods can leave streaks and water spots. Windows cleaned with purified water stay cleaner 2 to 3 times longer.
Most Toronto homeowners benefit from 2 to 3 professional cleanings per year. Spring is essential after winter salt and grime. A summer or fall cleaning keeps things looking sharp. Homes near trees or ravines may want 3 cleanings.
If the company is insured, file a claim through their liability insurance. Get photos of the damage immediately. This is exactly why hiring an insured company matters. Uninsured operators leave you covering the repair costs yourself.
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