If you bought a new-build home in the GTA in the last 2 years — in Brampton, Milton, Markham, Vaughan, Ajax, Pickering, or any of the booming suburban subdivisions — your windows almost certainly have invisible construction residue that's damaging your glass right now.
This isn't about aesthetics. It's about preventing permanent glass damage that costs 20-100x more to fix than to prevent.
The 4 Things Construction Leaves on Your Glass
1. Concrete & Mortar Splatter (pH 12-13)
During foundation pouring, bricklaying, and concrete finishing, fine cement particles become airborne and land on every surface — including your windows. Even if you can't see it, it's there. Concrete dust is highly alkaline (pH 12-13) — for reference, drain cleaner is pH 14. This alkalinity chemically reacts with the silica in glass, creating permanent etching.
2. Stucco Overspray
If your home has stucco (common in GTA subdivisions), the spray application process sends fine cement particles across the entire exterior. Stucco installers tape windows, but the tape doesn't seal perfectly — and the particles are so fine they get under tape edges. Result: a thin, invisible cement film on your glass.
3. Paint Overspray
Exterior and interior painters generate microscopic paint droplets that land on glass. Fresh paint spots are easy to remove. Cured paint spots (2+ weeks old) bond to glass and require razor blade removal — which can scratch tempered glass if done incorrectly.
4. Adhesive Residue
Window manufacturer labels, protective films, installation tape, and temporary weatherproofing all leave adhesive residue. Some adhesives (especially construction-grade tape) become chemically bonded to glass after UV exposure. After one summer, removal requires solvents.
What Builders Actually Clean (and Don't)
| What Builders Do | What They Don't Do |
|---|---|
| Wipe visible spots with paper towels | Remove microscopic concrete film |
| Peel off window labels | Remove adhesive residue under labels |
| Squeegee obvious smears | Check every pane from outside |
| Spray interior glass with Windex | Use purified water that prevents re-depositing |
| Remove large paint drips | Remove microscopic overspray |
The builder's clean is cosmetic — it makes windows look clean for your PDI (Pre-Delivery Inspection). It doesn't remove the contaminants that are actively damaging your glass.
The New-Build Cleaning Timeline
| When | What to Do | Why |
|---|---|---|
| PDI (move-in day) | Photograph every window | Document existing residue for Tarion claims |
| 30-day form | Note window residue on Tarion form | Creates warranty record |
| 3-4 months | Schedule professional cleaning | Neighbours mostly done; residue still removable |
| 6 months | LATEST for first professional clean | Beyond this, some damage may be permanent |
| 1 year (Tarion) | Year-end form — note any glass defects | Last chance for 1-year warranty items |
GTA New-Build Hotspots (2024-2026)
These areas have the highest concentration of new construction — and the highest risk of construction residue damage:
| Area | Active Developments | Risk Level |
|---|---|---|
| Milton | Bristol, Boyne, Trafalgar, Heritage Heights | 🔴 Very High (escarpment dust + construction) |
| Brampton | Mount Pleasant, Heritage Heights, Bram West | 🔴 Very High (constant expansion) |
| Markham | Cornell, Berczy, Angus Glen, Wismer | 🟠 High |
| Vaughan | VMC, Kleinburg, Block 27, Nashville | 🟠 High |
| Ajax/Pickering | Seaton, Duffin Heights, Liverpool | 🟠 High |
| Whitby | Brooklin, West Whitby, Whitby Shores | 🟡 Medium-High |
| Oshawa | Columbus, Kedron, Windfields | 🟡 Medium |
Post-Construction Cleaning: What It Costs
| Home Type | Post-Construction Clean | Damage Repair If You Wait |
|---|---|---|
| Townhouse | $199-$299 | $2,000-$8,000 |
| Semi-detached | $249-$349 | $3,000-$12,000 |
| Detached (2-storey) | $299-$449 | $5,000-$20,000 |
| Executive | $399-$599 | $10,000-$50,000+ |
Post-construction cleaning costs 20-100x less than the damage it prevents.
Why ClearCoat™ for New Builds
Standard tap water cleaning on new-build glass is counterproductive:
- Toronto tap water (124 mg/L TDS) deposits minerals on glass that trap construction residue underneath
- Each tap-water cleaning adds a new mineral layer on top of the construction contaminants
- After 2-3 tap-water cleanings, the construction residue is sealed under mineral layers and becomes permanently etched
ClearCoat™ purified water (0 TDS) dissolves construction residue without adding anything. It's the only appropriate method for post-construction glass.
New Home? Clock's Ticking.
Post-construction cleaning from $199. ClearCoat™ purified water. Date-stamped warranty receipts.
Book Post-Construction Clean →