Why Windows Get Foggy
Most windows in GTA homes use double glazing or triple glazing (double or triple pane). Two or three panes of glass are sealed together into one insulated glass unit. The space between the panes is gas filled, usually with argon, and a desiccant inside the spacer absorbs moisture.
Over time, heat, cold and sun break down the seal. Moisture gets in, the gas escapes, and condensation forms between the panes. That's seal failure. Once it starts, the fog won't clear on its own, and it usually gets worse: haze, water droplets, and white mineral stains on the inside of the glass.
Windows with a failed seal also lose insulation. You'll often feel the glass is colder in winter than the windows around it.
Window Seal Replacement Without a New Window
The frame, the sash and the hardware are usually still in good shape. Only the glass unit has failed. So we don't replace the whole window. We do sealed unit replacement: we remove the failed glass unit and install a new one in your existing frame.
Glass unit replacement is faster, cleaner and much cheaper than replacing the window. Installation takes under an hour per window, and your trim, sills and walls stay untouched.
Is Window Defogging Worth It?
Some companies offer window defogging: they drill small holes in the glass, clean out the moisture and seal the holes. It can make the glass look clearer for a while, but the original seal is still broken and the insulating gas is gone. A new sealed unit fixes the cause, not just the look, and it comes with a warranty.
What We Replace
- Casement, slider, fixed, awning and bay windows
- Double pane units
- Large picture windows
- Patio door glass
- Leaded and decorative glass in doors and sidelites (see front door glass)
- Frosted, tinted and patterned glass
Real Project Photos
Energy-Efficient Replacement Glass
Every new sealed unit is an opportunity to upgrade. We offer low-E coated glass and argon gas filled units, which keep more heat inside in winter and cut down condensation on the inside of the glass.
How Long Does It Take?
Each glass unit is made to the exact size of your window. We measure, the unit is custom-made, and we install it, typically within 5 to 15 business days. On installation day, each window takes under an hour.
Key Benefits
- Save 60-80% versus replacing the entire window and frame
- Fast turnaround: measured, custom-made and installed, typically within 5 to 15 business days
- Crystal-clear results: restores full visibility and insulation
- No mess: we vacuum and clean up after every job
- Warranty on all glass unit replacements
- Works with all window styles: casement, slider, fixed, bay
Our Process
Free Photo Assessment
Send us a photo of your window. We confirm it can be repaired and give you a free quote. In-person visits are $30, credited toward your job.
Clear Quote
You get a firm, written price upfront before any work begins. No surprises at the door.
Glass Removal
We carefully remove the failed glass unit from your existing frame, protecting trim and sills.
New Unit Installed
A new sealed insulated glass unit is installed and sealed for maximum energy efficiency.
Cleanup & Warranty
We clean up completely and provide your written warranty before we leave.
Sealed Unit Replacement Cost
The price depends on:
- The size of each glass unit
- The glass thickness and the size of the gap between the panes
- Glass type: clear, low-E, frosted, tinted or tempered
- How many windows you're fixing
- Access (ground floor or upper floors)
Send us a photo of your window and we'll give you a free quote, usually the same day. Most homeowners save 60-80% compared to full window replacement.
Frequently Asked Questions
Can all foggy windows be repaired without replacing the frame?
Will the fog come back after a window seal replacement?
How long does the repair take?
Will my new glass be energy efficient?
Do you warranty the repair?
Can you match my existing glass type (frosted, tinted, etc.)?
Is window defogging a good alternative?
Do you work outside Toronto?
Other Services You May Need
Front Door Glass
Decorative, frosted, or clear glass inserts for all front door and sidelite styles. Boost curb appeal instantly.
Window Crank Repair
Broken casement operators or crank handles repaired or replaced quickly. Restore smooth, effortless operation.
Skylight Repair & Replacement
Professional skylight glass replacement, leak repair, and seal restoration - without a full tearout.
Ready for Clear Windows Again?
Call now: same-day quotes available across the GTA.
Quote by visit: $30 | Quote based on photo: Free
*The $30 visit fee is credited toward your final payment if you proceed with the work
Or email us: Service@Luminasky.com
Getting ready for winter? Book a $30 Winter Ready Inspection.
Foggy Glass Repair by City
We serve homeowners across the Greater Toronto Area. Find foggy glass repair information specific to your city: