Hiring a window cleaner is a straightforward service, but asking the right questions upfront saves you money, prevents damage, and ensures spotless results. Most homeowners and business owners don't know what to expect, leading to disappointment or surprise costs. Here's what you need to clarify before booking.
Insurance and Licensing
This is non-negotiable. Ask whether the company carries liability insurance and, if working at heights, workers' compensation coverage. A legitimate window cleaner should provide proof of insurance without hesitation. If they're uninsured and damage your property or get injured on the job, you could be liable.
Also ask if they're licensed in your state or municipality. Requirements vary—some regions mandate licensing for exterior work, others don't—but it's a mark of professionalism and accountability.
What's Included in the Quote?
Window cleaning isn't one-size-fits-all. Clarify exactly what the service covers:
- Interior, exterior, or both?
- Do they clean the frames, sills, and tracks?
- Are storm windows or skylights included?
- What about gutters or roof debris removal?
A $150 quote might cover only exterior panes, while another $300 quote includes frames and interiors. Knowing the scope prevents sticker shock and ensures you're comparing apples to apples.
Pricing Structure and Payment Terms
Ask how they price their work. Common models include:
- Per-window pricing ($5–$15 per window on average)
- Square footage ($0.50–$2.00 per sq ft of glass)
- Flat rate for the job (common for residential properties)
- Subscription/regular service discounts (10–20% off monthly or quarterly plans)
Request a written estimate before work begins. Also ask about payment methods, deposits, and their cancellation or rain-date policy. Some companies require 50% upfront; others charge after completion.
Equipment and Techniques
Your home's condition matters here. If you have high windows, skylights, or second-story frames, ask what equipment they use. Do they use ladders, scaffolding, or rope access? Some cleaners use water-fed poles (reaching up to 60 feet without ladders), which is safer and faster.
For specialty windows—stained glass, solar panels, delicate frames—confirm they have experience. Water pressure and chemical selection can damage certain surfaces, so make sure they adjust their approach accordingly.
Timeline and Scheduling
How long does the job take? A typical two-story house with 15–20 windows usually takes 2–4 hours. Ask about their availability and whether they offer weekend or evening appointments if you work during the day.
If you need regular maintenance, clarify the frequency. Quarterly service is common for residential properties; commercial spaces may need monthly or more often, especially in dusty or coastal areas.
Dealing with Problem Areas
Be upfront about specific concerns. Do you have:
- Hard water stains or mineral buildup?
- Years of neglect or algae growth?
- Painted-shut frames or cracked seals?
Some issues require additional treatments (acid wash for mineral deposits, extra passes for buildup) and cost more. A good cleaner will assess these during a consultation and explain what's realistic. Some damage—like broken seals in double-pane windows—can't be fixed by cleaning and should be addressed separately.
References and Reviews
Ask for at least two recent references from similar properties (residential or commercial). Check online reviews on Google, Yelp, or Angie's List, but take extreme ratings with a grain of salt. Look for patterns: consistent praise for timeliness? Complaints about streaks or missed spots?
If they're part of a directory like Mercoly, you can compare multiple providers and their reviews side-by-side, making it easier to identify the most trusted option.
Guarantees and Follow-Up
What if you're not satisfied? Do they offer a re-cleaning guarantee, and within what timeframe? Reputable cleaners stand behind their work with a 24–48 hour satisfaction window.
Frequently Asked Questions
Q: How often should I have my windows professionally cleaned? Most residential homeowners benefit from professional cleaning 1–2 times per year, though coastal or dusty areas may need quarterly service. Commercial properties typically need monthly or bi-monthly cleaning.
Q: Is it safe to have my windows cleaned during winter? Yes, but water can freeze on frames or seals, creating ice hazards. Many cleaners avoid winter in cold climates or charge premium rates for the extra care required.
Q: What's the difference between hard water stains and regular dirt? Hard water stains are mineral deposits bonded to glass and require acid-based treatments, not just water and squeegee. Regular dirt washes away easily, so confirm which you have before paying extra for specialty treatments.
Ready to get started? Compare vetted window cleaners in your area and request multiple quotes to find the right fit for your needs.