Window & Door Repair in Markham
From Unionville heritage homes to new builds in Cornell — fast, reliable glass and window repair across all of Markham.
Markham is one of the GTA's most diverse cities, and its housing stock is just as varied — century homes along Main Street Unionville, townhouse complexes in Milliken, sprawling new subdivisions in Cornell and Cathedraltown, and everything in between. Each style brings its own window challenges. Older wooden frames need glass upgrades. Newer vinyl casements develop seal failures and crank problems as they age past the 10-year mark.
LuminaSky Glass handles it all with targeted repairs instead of costly full replacements. We swap out the failed sealed glass unit, replace a stripped crank operator, or install a new door glass insert — on-site, usually in a single visit. Your frames stay, your trim stays, and your wallet thanks you.
What We Fix in Markham
Foggy Glass / Sealed Unit Replacement
Condensation between panes is a dead seal. We replace the insulated glass unit on-site — your frame and hardware stay in place.
Glass Replacement
Cracked, broken, or vandalized glass in windows, patio doors, and sidelights. We source and install standard and custom glass sizes.
Window Crank & Operator Repair
Seized or broken crank mechanisms in casement and awning windows. We replace the operator so your window opens smoothly again.
Front Door Glass Inserts
Swap outdated or cracked decorative door glass for a fresh look. We work with all standard entry door glass sizes and styles.
Screen & Storm Doors
New screen doors, storm door glass replacement, and retractable screen installations across Markham.
Skylight Repair
Foggy or dripping skylights repaired without opening up your roof. We replace the glazing and re-seal the unit on all major brands.
Why Markham Homeowners Choose Us
Fast Response
Same-day or next-day service across Markham. Emergency calls answered within 2 hours.
Repair, Not Replace
We fix the broken part — the glass, the crank, the seal — without tearing out your whole window or door.
1-Year Warranty
Every repair backed by our warranty. If it fails, we come back and fix it — no questions asked.
We Come to You
Fully mobile service. We bring everything we need to your door — no trips to a shop required.
Areas We Cover in Markham
We serve all neighborhoods across Markham and surrounding areas. Same-day or next-day service available throughout:
Frequently Asked Questions — Markham
Do you serve all of Markham?
Can you repair windows in newer subdivisions like Cornell or Cathedraltown?
How much does it cost to fix a foggy window in Markham?
Do you also fix commercial storefront glass?
Get a Free Quote in Markham
Window or door issue in Markham? Snap a photo and text it to us on WhatsApp — we'll reply with a quote fast. Or just call.