How to Hire a Window Washing Service You Can Trust

You’re tired of streaky glass, hard water spots, and trying to balance on a ladder with a spray bottle. It’s time to hire a professional window washing company, but you don’t want to waste money or invite the wrong people into your home. This guide walks you through how to choose a reliable window washing pro, what services to ask for, what to put in writing, and the red flags that mean you should keep looking.

Know What Type of Window Washing Service You Actually Need

Before you start calling companies, get clear on what you want done. It will save you money and help you compare quotes fairly.

Common services window cleaning companies offer:

• Exterior window washing

  • Scrubbing and squeegeeing the outside glass
  • Removing cobwebs, loose debris, and light dirt
  • Often done with ladders, extension poles, or water-fed pole systems

• Interior window washing

  • Cleaning inside glass surfaces
  • Wiping window sills and frames (ask if this is included or extra)
  • Being careful around furniture, window treatments, and flooring

• Screen cleaning

  • Removing and washing insect screens
  • Brushing or washing and drying before reinstalling
  • Important if your screens are dusty, clogged, or covered in pollen

• Track and frame cleaning

  • Vacuuming and wiping window tracks and channels
  • Wiping down frames and sills to remove grime and bugs
  • Often priced separately from glass-only window washing

• Hard water stain or mineral deposit removal

  • Using specialized chemicals or polishing pads on stains that don’t come off with normal soap
  • Can be labor-intensive and may be billed as a separate restoration service

• Skylight and high window cleaning

  • Requires special ladders, poles, or roof access
  • Higher risk, so ask specifically if they’re equipped and insured for this

• Storm window and multi-pane assembly cleaning

  • Removing, cleaning, and reinstalling storm panels or interior inserts
  • More time-consuming than standard single-pane window washing

When you call for quotes, spell out:

• Number of windows (estimate is fine)
• Whether you want interior, exterior, or both
• Whether you have screens, storms, skylights, or very high windows
• Any known issues like paint overspray or heavy hard water spots

The more precise you are about the window washing you need, the more accurate your estimates will be.

Check Licensing, Insurance, and Basic Credentials

Window washing is often treated as general cleaning, but that doesn’t mean you can skip checking credentials.

Ask each company:

• Are you licensed to operate this business?
  Requirements vary by location, but a legitimate business should be able to tell you clearly what license or registration they operate under.

• Do you carry liability insurance?
  This protects you if they damage your windows, siding, roofing, or interior surfaces while cleaning.

• Do you carry workers’ compensation insurance?
  This matters because window washing often involves ladders and roof access. Workers’ comp protects you from being on the hook if someone gets hurt on your property.

• How do you train your technicians?
  Look for a clear process: safety training, ladder safety, use of harnesses when needed, chemical handling, and how they protect interior floors and furnishings.

• Do you run background checks on employees?
  Especially important if they’ll be working inside your home without you in the room at all times.

Ask for proof of insurance and be willing to:

• Request a certificate of insurance showing coverage is current
• Confirm the company name on the insurance matches the name on your estimate or contract

If a provider resists or gets vague about licensing or insurance, move on.

How to Get and Compare Window Washing Quotes

Collect at least two or three quotes so you can compare. Handle it the same way with each company so you’re comparing similar services.

Step 1: Prepare basic information

Before you call or email:

1. Walk your property and count windows (or at least estimate by room).
2. Note any special items: skylights, high transom windows, French panes, storm windows.
3. Decide if you want interior, exterior, or both sides of the glass.
4. Take photos of tricky areas (very high windows, decks below, landscaping in the way).

Step 2: Ask each company for an itemized quote

A strong window washing quote should spell out:

• What’s included:

  • Interior, exterior, or both
  • Screens, sills, and tracks: included or extra
  • Any special treatments (hard water stain removal, paint removal, etc.)

• How they’re pricing:

  • Per window, per pane, per “opening,” or per project
  • Whether skylights, doors, and picture windows are priced differently

• Logistics:

  • Approximate time on site
  • How many technicians they’ll send
  • Whether you need to move furniture or they handle it

• Payment terms:

  • Deposit required or payment upon completion
  • Accepted payment methods
  • Any cancellation or reschedule fee

Get the quote in writing (email or PDF). If someone only wants to give a verbal number with no details, that’s a red flag.

Step 3: Don’t just chase the lowest number

When comparing quotes, look at:

• Scope: Is one quote missing interior cleaning or screen washing that the others include?
• Safety practices: Are they using proper ladders and fall protection for higher windows?
• Experience: How long they’ve been in business and what type of properties they usually service.
• Communication: How quickly and clearly they answer your questions.

A somewhat higher price from a properly insured, careful company is usually cheaper in the long run than fixing scratched glass or a broken skylight.

Key Questions to Ask a Window Washing Company

Use this table when you’re on the phone or meeting for an estimate.

What to Put in Writing Before Work Starts

Even for a straightforward window washing job, you want some basic terms documented.

Your written agreement or confirmation should cover:

• Full scope of work

  • Interior vs. exterior
  • Number or type of windows (standard windows, doors, skylights)
  • Whether screens, tracks, sills, and frames are included

• Any special services

  • Hard water stain removal
  • Paint, silicone, or construction debris removal
  • Screen repair or replacement (often a separate service)

• Pricing and payment terms

  • Total price or clear unit pricing (per window or per pane)
  • When payment is due and what forms are accepted
  • Any additional charges (fuel surcharges, very high access fees, etc.)

• Scheduling details

  • Date and time window for arrival
  • Estimated duration of the job
  • Weather policy (what happens if it’s raining or too windy)

• Responsibility for prep work

  • Whether you must move furniture, window treatments, or breakables
  • How they handle windows that can’t be reached safely

• Warranty or satisfaction guarantee

  • How long you have to call about streaks or missed areas
  • Whether they return at no charge to fix issues

Keep copies of all emails and written estimates until the job is complete and you’re satisfied.

How Professional Window Washing Should Be Done (So You Can Spot Corners Being Cut)

You don’t need to be a pro, but knowing the basics of good technique helps you recognize quality.

A competent crew will typically:

• Use appropriate tools:

  • Scrubbers (t-bar or strip washers)
  • Squeegees with clean, sharp rubber
  • Extension poles when safe
  • Bucket, mild cleaning solution, and clean cloths or detailing towels

• Protect your property:

  • Use drop cloths or towels under interior windows
  • Wear shoe covers or wipe shoes when entering
  • Avoid dragging ladders across flooring or landscaping

• Handle ladders and high work safely:

  • Place ladders on stable surfaces
  • Avoid leaning ladders against gutters or fragile trim when possible
  • Use spotters or stabilizers for high or awkward windows

• Work methodically:

  • Clean one window at a time or one side of the house at a time
  • Wipe edges and corners after squeegeeing
  • Check from multiple angles for streaks or missed spots

If techs are using dirty rags on glass, skipping sills and frames they said they would clean, or clearly rushing to finish, bring it up on the spot with the crew lead or call the office before you pay.

Red Flags When Hiring a Window Cleaning Service

Pay attention to these warning signs:

• No written estimate or scope
  They insist on “just trust us, we’ll take care of it” with no documentation.

• Vague or missing insurance
  They say “we’re covered” but can’t provide a current insurance certificate.

• Cash-only with no receipt
  Not always a dealbreaker, but it often means no paper trail if there’s a dispute.

• Unwilling to discuss safety
  They brush off questions about ladders, fall protection, or how they access high windows.

• High-pressure tactics
  They push “today only” pricing, want you to sign immediately, or resist giving you time to compare quotes.

• Unmarked vehicles and no basic uniform or ID
  Alone this isn’t proof of a problem, but combined with other issues, it’s a sign of a loosely run operation.

• Won’t answer who will actually be at your house
  You should know if it’s employees, subcontractors, or a mix, and who supervises.

Trust your gut. If communication feels sloppy before they even show up, it usually doesn’t improve on job day.

How to Handle Problems or Unsatisfactory Work

Even with a good company, things can go wrong. Handle it promptly and in writing.

1. Inspect the work before paying in full
   Walk around while they’re still there. Look at:

   • Streaks or missed spots
   • Drips on sills or walls
   • Screens reinstalled correctly
   • No new scratches or chips

2. Point out issues immediately
   Most window washing companies expect a walkthrough and will touch up on the spot.

3. Document serious problems
   If you find damage later:

   • Take clear photos from multiple angles
   • Note dates and times you noticed the issue
   • Save all written communication

4. Use the company’s process first
   Contact the office, explain the issue calmly, and refer back to your estimate/contract and any guarantees they offered.

5. Escalate if needed
   If they refuse to address legitimate damage or unfinished work:

   • Consider leaving an honest review so others are warned.
   • If the damage is significant, talk to your homeowner’s insurance or consult an attorney about next steps.

The more clearly you documented the window washing agreement at the beginning, the easier this process is.

What to Do Next

To move forward efficiently:

1. Walk your home, count windows, and list any special issues (hard water stains, skylights, high windows).
2. Decide exactly what window washing you want: interior, exterior, screens, tracks, or all of the above.
3. Contact at least two or three companies with the same information and request detailed written estimates.
4. Ask the key questions from the table above about insurance, safety practices, and what’s included.
5. Choose the company that combines clear communication, proper coverage, and a fair—not just cheap—price.
6. Get the scope, price, timing, and guarantee in writing before anyone sets up a ladder.

If you take these steps, you’re far more likely to end up with spotless glass, no surprises on your bill, and a window washing company you’ll feel comfortable calling back next time.