Bolton window opening after removal of the old insulated glass unit, with the original frame retained.
Unit removed: Insulated Window Glass with Decorative Grille Replaced in Bolton

Signs the window needs service

  • A sealed window glass unit has failed or is damaged while the surrounding frame remains usable.
  • The insulated glass thickness, spacer, coating or internal grille must be measured and matched.
  • The window needs glass-only replacement rather than a full frame or operating-system replacement.
New insulated window glass with internal decorative grille installed in Bolton
After: Insulated Window Glass with Decorative Grille Replaced in Bolton

What we check and repair

  • Window-frame and glazing-pocket review before the unit is ordered.
  • Measurement of the insulated glass thickness, spacer and visible configuration.
  • Replacement of the failed or damaged window glass unit while retaining a serviceable frame.
  • Final fit, seal and appearance checks.

Repair or component replacement is likely when

Glass-only replacement is the right path when the sash, frame and glazing pocket remain serviceable.

Full-window replacement may be better when

Full window replacement is considered separately when the frame or sash is damaged, distorted or no longer practical to retain.

Parts, compatibility and property details
Parts and systems
Insulated glass unit · Window sash · Existing window frame · Glazing beads / stops · Spacer system · Decorative grid where present
Standards and requirements
Applicable Ontario Building Code requirements · Applicable safety-glazing requirements where relevant · Manufacturer installation requirements for compatible window and hardware systems
Need help with this problem?Call or send photos and we will confirm the next step

Handling Large Insulated Glass Units

Large sealed units require controlled delivery, protected staging and safe removal of the failed glass before the replacement is installed.

Delivery of a large insulated glass unit into a commercial space

Commercial delivery and staging

Large insulated glass units for commercial spaces are delivered and moved into position with glass-handling equipment before installation begins.

Delivery of a large insulated glass unit for residential installation

Residential delivery to the opening

For homes and custom openings, the sealed unit is brought in carefully and positioned so the replacement can happen without unnecessary handling risk.

Removal of a broken insulated glass unit for disposal

Removal and disposal of failed glass

Broken or failed sealed units are taken out safely and removed for disposal once the opening is ready for the new replacement glass.

Window glass replacement and related glass projects

10 projects

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Questions about Window Glass & IGU Replacement & Installation

Can the existing window frame stay when the IGU is replaced?

Often yes, when the sash, frame, stops and glazing pocket remain serviceable. We check those components before the unit is ordered.

What details must be matched in an insulated glass unit?

The required size, thickness, spacer, glass configuration and visible options such as coatings or internal grilles are reviewed from the existing unit and opening.

Is condensation between panes always a failed sealed unit?

It can indicate a failed sealed unit, but moisture on the room-facing surface or around the frame has a different cause. We check where the moisture is before recommending glass replacement.

Can you also replace glass in an entry or patio door?

Yes. We also replace glass in serviceable entry, garden and patio door panels through our Door Glass & Sidelight Replacement service. Send a full door photo so we can identify the glass and frame details.

What photos help with an IGU quote?

Send a full inside photo, a close-up of the spacer or edge when visible, the approximate glass dimensions and a photo showing the window type and access.

Toronto & GTA service coverage

Toronto residential window glassMississauga insulated window unitsWindow IGU replacement across the GTA TorontoMississauga

Send photos of the window, not just the broken part

Send a full window photo, a close-up of the failed or damaged unit and rough glass dimensions so we can confirm the insulated window glass replacement scope.

DoorWin Google Reviews

Curtis Savage 8 reviews
★★★★★

I hired DoorWin services to replace two cracked glass windows for a unit at my triplex. An exterior porch window and interior stairwell window I just needed the panes of glass replaced and not the entire frame . DoorWin was happy to do the job. Unlike some other companies who wanted to replace the entire frame at a higher cost. They were very quick with a quote and were able to perform the job on an extremely tight timeline that I had to unexpectedly move up. Very professional. Friendly. Dependable. Competitive prices. Took away all materials and left a clean worksite. Would highly recommend and will work with them again if I need another window repair.

Ike Kvapil 6 reviews • 4 photos
★★★★★

Max at DoorWin completed a professionally executed job on our front door while being a pleasure to deal with...would recommend him for any services their company provides.

J1330i 2 reviews
★★★★★

Guys, thank you again for the excellent services!! Extremely fast and professional at a fair price...thanks again!!!

Nicole Seahra Local Guide • 62 reviews • 19 photos
★★★★★

Doorwin Services alongside Alex were amazing. Came in same day. Went above and beyond. Thanks so much!

Anastasiia Dashkevych 7 reviews
★★★★★

Great experience with the window replacement. The team was professional, efficient, and the quality of work exceeded expectations. Everything was completed on time and looks amazing. Highly recommend!!!!!wont be disappointed:)

Amir Malek 5 reviews
★★★★★

Had an amazing experience with Doorwin Services for my metal door installation. The quality of work, attention to detail, and professionalism were top notch from start to finish. Big thanks to Maksim for all his hard work and help throughout the process — everything was installed perfectly and the final result looks great. Highly recommend Doorwin Services if you want quality work done right.

yarin danan 9 reviews • 4 photos
★★★★★

Excellent service. I needed help with a broken window. They did everything quickly and efficiently. I recommend them

Oleksandr Branytskyi 4 reviews • 2 photos
★★★★★

Excellent service from start to finish. The work was completed professionally, quickly, and with great attention to detail. The technician gave us several options on how to strengthen and improve the glass unit, and we chose the best solution. Everything looks great now. Highly recommend!

Trevor Hickey 3 reviews
★★★★★

Excellent service and Excellent quality!!!

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