Getting quotes from window cleaners? Ask these 10 questions. The answers tell you everything about whether they're professional, insured, and worth your money. We've included what good answers look like, what bad answers look like, and how MANTLE answers each one.
Question #1 — Critical
"Are you insured? Can I see your certificate?"
This is #1 for a reason. An uninsured window cleaner who drops a ladder through your bay window costs YOU $500-$2,000+.
✅ Good: "Yes, $2M liability. I'll email the certificate today."
❌ Bad: "Yeah, I'm covered." (No specifics, no certificate.)
💧 MANTLE: "$2M general liability. Certificate emailed within 1 hour of request."
Question #2 — Critical
"What type of water do you use?"
In Toronto (300+ TDS), this determines whether your windows stay clean or develop mineral haze within days.
✅ Good: "Purified/deionized water, 0 TDS."
❌ Bad: "Just regular water." / "What do you mean?"
💧 MANTLE: "ClearCoat™ purified water, 0 TDS. Standard on every job, no extra charge."
Question #3 — Critical
"Is your price all-inclusive?"
The #1 source of surprise charges. Screens, tracks, sills, and hard water removal should be included.
✅ Good: "Yes — windows, screens, tracks, sills, everything."
❌ Bad: "Screens are extra." / "Tracks and sills are add-ons."
💧 MANTLE: "All-inclusive flat rate. Windows, screens, tracks, sills, before/after photos. The quote = the price."
Question #4
"What's your guarantee if I'm not happy?"
✅ Good: "We'll redo it free within 48 hours. If still not right, full refund."
❌ Bad: "We guarantee satisfaction." (Meaningless without specifics.)
💧 MANTLE: "Redo-or-free guarantee. We come back within 48 hours or you don't pay."
Question #5
"Who will actually be cleaning my windows?"
✅ Good: "Me and my regular crew. Same team every visit."
❌ Bad: "Whoever's available that day." / "Our subcontractors."
💧 MANTLE: "Shaw and the MANTLE crew. Same team, consistent quality."
Question #6
"Do you provide before/after photos?"
✅ Good: "Yes, standard practice. Texted to you after every job."
❌ Bad: "You can take your own photos."
💧 MANTLE: "Before/after photos texted within 1 hour of completion. Every job."
Question #7
"What happens if it rains on cleaning day?"
✅ Good: "We reschedule free, same week. Rain actually doesn't affect purified water cleaning much — no minerals to spot."
❌ Bad: "We clean rain or shine." (True for purified water, sketchy for tap water.)
💧 MANTLE: "Light rain doesn't affect ClearCoat™ results. Heavy rain: free reschedule, same week."
Question #8
"Can I see your Google reviews?"
✅ Good: "Here's our Google Business link — 4.5+ stars, 20+ reviews."
❌ Bad: "We don't really do Google." / "Check Facebook."
💧 MANTLE: "We're new (April 2026 launch). We'll earn our reviews one job at a time. Happy to provide references from early customers."
Question #9
"How do you handle heritage or delicate windows?"
✅ Good: "Hand-cleaning with pH-neutral solution. No abrasives on heritage glass."
❌ Bad: "What do you mean by heritage?"
💧 MANTLE: "Hand-cleaning for stained glass, leaded glass, heritage putty. pH-neutral solutions. ClearCoat™ purified water only."
Question #10
"What's your cancellation policy?"
✅ Good: "Cancel free up to 24 hours before. Same-day cancellation: 50% fee."
❌ Bad: "No cancellations." / "Full charge if you cancel."
💧 MANTLE: "Free cancellation up to 24 hours before your appointment. Life happens."
Pro tip — the phone test: Call, don't just email. If the owner answers the phone, explains everything clearly, and doesn't pressure you — that's your company. If you reach a call centre, get transferred 3 times, and feel pushed toward a package — keep looking. Window cleaning is a trust business. You're letting someone onto your property with ladders. Trust starts with the first phone call. Call MANTLE: (416) 206-3274 →
Ask Us Any of These 10 Questions
We answer all of them confidently. ClearCoat™ purified water. All-inclusive. Redo-or-free.
Get Free Estimate →Or call (416) 206-3274