Window hardware failing, glass damaged or a door no longer closing correctly? We provide repair, replacement and installation options for Markham homes, businesses and managed properties.
For foggy, cracked or hard-to-operate windows, we first determine whether the frame can stay. We replace failed IGUs, cranks, hinges and locks when the existing window is serviceable.
When the sash or frame is no longer worth repairing, we can replace the complete window and install a new compatible unit rather than repeatedly repairing a failing system.
We repair sticking entry and patio doors, failed hinges, rollers, closers, locks and alignment problems. For commercial entrances we also service panic bars, pivots and automatic door hardware.
If the slab, frame or entrance system is damaged beyond practical repair, we can replace the door and frame or install a new compatible entrance system.
Upgrade your home’s security with high-grade handlesets, smart locks, and properly aligned deadbolts.
For Markham’s bustling commercial and tech sectors, we repair heavy-duty aluminum door closers, pivots, and panic bars to keep businesses accessible and safe.
We supply and install custom replacement glass for shattered patio doors, decorative residential sidelites, and office partitions.
In our Markham patio-door project, we replaced fogged glass without removing the frame. We check the surrounding door before measuring a replacement insulated unit.
View this completed project
A Markham window with fog between panes needs a glass assessment; a draft around its edge needs a check of fit and seals. We separate those symptoms so the quote addresses the right problem.
We can renew deteriorated caulking and replace flattened weatherstripping on a serviceable opening. We also check whether a loose latch or hinge prevents the seal from making contact.
When a break-in or accident shatters your security, our Markham emergency team responds 24/7 to board up the damage.
Our Thornhill store-door project involved a lock-side problem after a break-in attempt. We inspect the damaged entrance and arrange securing before agreeing the hardware or glass needed for a permanent repair.
Choose a category to see specific repairs, replacement options and advice for your opening.
3 projects in Markham, plus 9 examples from other cities.
Before
After
Fogged patio door glass in Markham replaced without frame removal, restoring a clear sealed unit and better everyday views.
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After
Store door would not lock after a break-in attempt in Thornhill. We repaired the lock-side damage and restored secure closing.
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After
Stairwell fire door replacement in Markham with better fit, closer control and safer daily use near Konrad Crescent.
Storm damage
Repaired
A tree broken during the September 2, 2026 storm struck a Toronto home and shattered a window. We boarded up the damaged opening, then returned to install new glass and repair the window, restoring its finished appearance.
Before
Final installation
Cracked residential window glass in Fairbank, Toronto was replaced with a new sealed unit while the existing window and frame remained in place.
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After
Sliding patio door glass in Yorkville, Toronto shattered on August 12 and was secured the same day with a temporary board-up. On August 16, we installed new glass with grille inserts and restored the existing sliding patio door.
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After
We restored older wooden windows in Cabbagetown, Toronto by replacing the glass throughout the window set and completing full re-sealing while preserving the original wood frames.
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After
A damaged commercial storefront fixed glass panel in Mississauga was replaced with new clear glass while the existing aluminum storefront frame remained in place.
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After
Entry door sidelight glass in Mississauga was replaced while the existing front door and surrounding entry frame remained in place.
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After
We repaired an automatic telescopic sliding door at a Downtown Toronto business centre after an internal steel cable failed, restoring the existing automatic entrance system.
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After
Cracked window pane replaced in the York area of Toronto while keeping the existing window frame in place.
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After
Existing interior door and frame in Mississauga replaced with a new grey metal door and metal frame installed in the same opening.
12 projects
Start with the affected opening: these checks help identify the repair or replacement service you need.
A storefront door scraping the threshold needs its pivots, hinges and closer checked together. We assess alignment before recommending component replacement or a larger entrance repair.
Commercial door repairDrafts and foggy glass need different checks. Review sash hardware, seals and frame condition before deciding whether an original window needs adjustment, new glazing or replacement.
Window servicesFor a manual entrance being fitted with an operator, we review door condition, controls and compatibility. The scope and any separate accessibility requirements must be established for that property.
Automatic door operatorsHeavy operation calls for a roller and track inspection. Perimeter drafts call for a separate weatherstripping and caulking check, so each repair addresses the affected part.
Sliding patio door serviceOur Markham-area projects include foggy patio glass, a stairwell door and a Thornhill store entrance damaged during a break-in attempt. We use these different repair paths to explain what can be retained and what needs replacement.
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.
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.
Guys, thank you again for the excellent services!! Extremely fast and professional at a fair price...thanks again!!!
Doorwin Services alongside Alex were amazing. Came in same day. Went above and beyond. Thanks so much!
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:)
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.
Excellent service. I needed help with a broken window. They did everything quickly and efficiently. I recommend them
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!
Excellent service and Excellent quality!!!
