Fog, haze or moisture between the panes of a double-pane window means the seal on the insulated glass unit (IGU) has failed. The window frame is usually fine — and window companies that quote you a full replacement are selling you 60% more than you need.
GlassForge measures the failed unit, fabricates a new sealed IGU with fresh Low-E coating and argon fill, and swaps it into your existing frame. Your window looks and insulates like new for a fraction of replacement cost.
What’s Included
- Exact-size IGU fabrication (any brand of window)
- Low-E coating and argon gas fill matched to original
- Tempered IGUs for doors and code locations
- Grids/muntins between glass replicated
- Works on vinyl, wood, fiberglass and aluminum frames
- Multi-unit discounts for whole-house seal failure
- 10-year seal warranty on new units
Foggy Glass / IGU Repair Pricing in the Philadelphia Metro
| Job | Typical installed price |
|---|---|
| Standard IGU (up to 24×36) | $250 – $400 |
| Large IGU (up to 36×60) | $380 – $600 |
| Tempered IGU | $350 – $650 |
| Patio door IGU | $450 – $750 |
| 5+ units (per-unit price) | 10–15% off |
Installed price including old unit disposal. Fabrication 3–7 business days from measure.
How It Works — Estimate → Measure → Forged & Fit
Free Estimate
Send photos or use our instant calculator. You get a real price range the same day — not a sales appointment.
Free On-Site Measure
A technician (not a salesman) confirms measurements to the millimeter and locks your exact price. No surprises on install day.
Forged & Fit
Glass is fabricated to spec, installed clean, sealed, and backed by our 10-year workmanship warranty.
Frequently Asked Questions
Why is there fog between my window panes?
Do I need a whole new window?
What about defogging services that drill the glass?
How much does IGU replacement cost?
How long does it take?
Related Services
Where We Work
Crews dispatched daily across Philadelphia, Bucks County, Montgomery County, Delaware County, South Jersey and Wilmington, DE. See all service areas →
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