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40 guides on repairing versus replacing glass, what the work costs in the GTA, and what happens on the day. Researched and fact-checked, not sales copy.

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Window and Glass Repair Costs in Toronto & the GTA (2026 Guide)Most window glass repairs in the GTA cost between about $150 and $1,000 per opening in 2026: roughly $150–$300 for a small single pane and $350–$650 for a standard double-pane sealed unit, with tempered, oversized and after-hours jobs costing more. Keeping the existing frame is where the savings are: for comparison, the complete new window you avoid typically runs $600–$1,500 installed. These ranges come from published GTA contractor price guides dated April to September 2026 and generally exclude HST.8 min read Foggy Double-Pane Windows: Replace the Glass, Keep the FrameFog or haze trapped between the panes of a double-pane window means the sealed glass unit (IGU) has failed, and Natural Resources Canada says the fix is to replace that unit. If the frame and sash are sound, you can replace only the sealed unit and keep the window, usually for a fraction of the cost of a new window. Only a rotted, cracked or warped frame, or a change the old frame can't take, turns it into a window-replacement job instead.9 min read Broken Window or Glass Door: What to Do in the First HourIn the first hour after a window or glass door breaks, get people and pets out of the room, put on shoes and gloves, photograph the damage, clear loose glass with a broom rather than your hands, and close the opening with poly sheeting or a plywood board-up. Then call your insurer if it is a break-in, storm or large loss, and book replacement glass for the existing frame. OhMyGlass runs a 24/7 emergency line that boards up openings and measures for the new pane or sealed unit, so the window itself stays.7 min read Window Glass Replacement Cost in Toronto (2026 Price Guide)In the GTA, replacing a standard double-pane sealed unit in an existing frame typically costs about $350 to $650 installed, based on contractor price guides published in 2026. Small single-pane glass runs about $100 to $250, large or oversized sealed units $650 to $1,500 or more, and tempered or laminated safety glass $450 to $900 or more. Because your frame stays, glass-only work sits well below the $1,000 to $1,800+ one GTA contractor lists for a new window in the same opening.7 min read

GUIDES · 01

Foggy & sealed units

Condensation Inside Your Windows: A GTA Winter Humidity GuideCondensation on the room side of your windows in winter means your indoor air holds more moisture than the cold glass can tolerate. The fix is to bring humidity down, into Health Canada's 30 to 50% range and toward the lower end on cold snaps, and to keep air moving over the glass with fans, open blinds and ventilation. Moisture between the panes is different: it means a failed sealed unit, and no amount of dehumidifying will clear it.7 min read Foggy Double-Pane Windows: Replace the Glass, Keep the FrameFog or haze trapped between the panes of a double-pane window means the sealed glass unit (IGU) has failed, and Natural Resources Canada says the fix is to replace that unit. If the frame and sash are sound, you can replace only the sealed unit and keep the window, usually for a fraction of the cost of a new window. Only a rotted, cracked or warped frame, or a change the old frame can't take, turns it into a window-replacement job instead.9 min read How to Tell If Your Window Seal Is Broken (7 Signs + Quick Tests)The surest sign of a broken window seal is fog, haze or droplets between the panes that you can't wipe off from either side; white streaks inside the glass, distorted reflections from bowed panes and a unit at its typical failure age are other signs. The fix is a new sealed glass unit, usually in your existing frame, not a new window. Drafts and leaks around the sash point to a different seal, the weatherstripping or caulking, which is a cheaper fix.7 min read What Is a Sealed Glass Unit (IGU)? Anatomy, Lifespan and WarrantiesA sealed glass unit, or insulated glass unit (IGU), is the factory-made glass package in a modern window: two or three panes held apart by a spacer, sealed at the edges, and filled with dry air or an inert gas such as argon. It does most of the insulating work in a double- or triple-pane window. Sealed units typically last about 10 to 25 years, and when one fails you can usually replace just the unit and keep the frame.7 min read Window Defogging: Does It Actually Fix a Foggy Window?Window defogging can make a foggy double-pane window look clear again, but it does not fix the broken seal or put back the argon, so the window doesn't regain its insulating value. It's a cosmetic fix. Natural Resources Canada recommends replacing the sealed unit instead, which usually costs a few hundred dollars more and gives you a new seal and often a new warranty.7 min read

GUIDES · 02

Glass replacement

Glass Repair vs Replacement: When to Fix the Glass, Not the WindowFix the part that failed and keep the frame. If the glass is cracked, broken or foggy but the frame and sash are sound, replacing just the pane or sealed unit (about $350 to $650 for a standard GTA sealed unit) is the better buy. Cracked glass itself can't be truly mended, only replaced, and only a rotted, cracked or warped frame, or a change of size or style, makes it a window-replacement job instead.8 min read Low-E, Argon or Triple Pane? Choosing Glass for a New Sealed UnitWhen you replace a sealed unit in an existing frame, low-E glass with argon and a warm-edge spacer is the upgrade that usually makes sense: it fits at the same thickness and adds roughly 10 to 20% to the unit price. Triple pane insulates better, but the unit is thicker and 30 to 50% heavier, so it rarely fits an existing frame and only comes into play when a window has to be replaced anyway. In colder York Region towns such as Richmond Hill and Newmarket, triple pane pays back a little faster, but the case for it is mainly comfort and less condensation.9 min read Window Glass Replacement Cost in Toronto (2026 Price Guide)In the GTA, replacing a standard double-pane sealed unit in an existing frame typically costs about $350 to $650 installed, based on contractor price guides published in 2026. Small single-pane glass runs about $100 to $250, large or oversized sealed units $650 to $1,500 or more, and tempered or laminated safety glass $450 to $900 or more. Because your frame stays, glass-only work sits well below the $1,000 to $1,800+ one GTA contractor lists for a new window in the same opening.7 min read

GUIDES · 03

Breakage & emergencies

Broken Window or Glass Door: What to Do in the First HourIn the first hour after a window or glass door breaks, get people and pets out of the room, put on shoes and gloves, photograph the damage, clear loose glass with a broom rather than your hands, and close the opening with poly sheeting or a plywood board-up. Then call your insurer if it is a break-in, storm or large loss, and book replacement glass for the existing frame. OhMyGlass runs a 24/7 emergency line that boards up openings and measures for the new pane or sealed unit, so the window itself stays.7 min read Why Did My Window Crack? Thermal, Impact and Pressure CracksMost windows that crack without being hit are thermal stress cracks: a single line that starts at the edge of the glass at a right angle, caused by the centre of the pane warming while the edge stays cold. A starburst from one point means an impact, and a curved, hourglass-shaped crack in double-pane glass points to pressure. None of these cracks can be mended, but the fix is glass, not a new window: the pane or sealed unit is replaced and a sound frame stays.8 min read

GUIDES · 04

Doors & patio

Entry Door and Sidelight Glass: Replacement, Privacy and Safety RulesIn most steel and fibreglass entry doors, the glass is a framed insert (a 'lite') that can be replaced without replacing the door, and sidelights work the same way. Replacement glass must be safety glass where Ontario's code requires it: door glass over 0.5 m² that reaches within 900 mm of the bottom, and sidelights wider than 500 mm that could be mistaken for a door. Frosted, etched or decorative inserts add privacy while keeping the light.7 min read Patio Door Glass Replacement: New Glass, Same DoorIf your patio door frame, rollers and track are in good shape, replacing only the sealed glass unit is usually the better fix: one GTA installer lists $650–$1,700 for a glass-only patio door unit, a fraction of the $1,800–$5,500 a new sliding door would cost. The new glass must be tempered safety glass made to size, so plan on a fabrication wait.7 min read Sliding Patio Door Hard to Open? Rollers, Tracks and Locks ExplainedA sliding patio door that is hard to open usually has a dirty track, rollers that are worn or set too low, or a damaged track; a healthy slider should glide with two fingers. Cleaning and adjusting often fixes it, and published GTA prices for roller and track repair mostly fall between about $95 and $300 (up to $650 at some firms), far below the $1,000–$3,500 a new door costs (2026).7 min read

GUIDES · 05

Hardware

Casement Window Crank Not Working? Operator, Hinge and Sash FixesIf the crank handle spins freely and the casement window doesn't move, the gear inside the operator is stripped and the operator needs replacing, a part one GTA installer prices at $25–$90 and a 20–30 minute swap. If the handle is stiff but still moves the sash, the operator is usually fine and the problem is dry or bent hinges, binding arms or a sagging sash. Either way it's a hardware repair: the window and its glass stay.6 min read GTA Winter Checklist for Windows, Glass and DoorsGet GTA windows and doors ready for winter in October and early November: find and fix drafts, replace worn weatherstripping, caulk exterior gaps while temperatures are still between about 5 °C and 25 °C, check every double-pane window for fog between the panes, and clean and lubricate tracks, cranks and locks. Once the heat is on, keep indoor humidity around 30–50% (lower when it's very cold) to limit condensation on the glass.8 min read Window and Door Hardware: Locks, Hinges and Weatherstripping That FailMost windows and doors that stick, won't lock or leak air have a hardware problem, not a glass or frame problem: a misaligned lock, a sagging or worn hinge, or tired weatherstripping. These parts wear on predictable schedules (felt weatherstripping lasts about 1–2 years, tubular rubber about 5) and are usually repaired or replaced for a fraction of the cost of a new window or door.7 min read Window Won't Stay Up? Single- and Double-Hung Balance RepairA single- or double-hung window that won't stay up, slams down or is very hard to lift has a worn, broken or mismatched balance, the spring system in the side of the frame that carries the sash's weight. The fix is to identify the balance type and replace it with an exact match, which is a repair, not a reason to replace the window.6 min read

GUIDES · 06

Shower & mirrors

Cloudy Shower Glass in Toronto: Hard-Water Deposits or Etching?If the cloudiness nearly disappears when the glass is wet, it's mineral deposits sitting on the surface, and an acidic cleaner will remove it. If the haze stays visible wet or dry and the glass feels smooth but dull, the surface has been etched. Etching is permanent damage that cleaning can't reverse; a badly etched panel is usually replaced on its own, made to fit your existing hinges, rather than replacing the whole enclosure.7 min read Custom Mirrors: Sizes, Edges, Safety Backing and MountingA good custom mirror comes down to four choices: thickness (6 mm for anything large), the edge finish, whether to add safety backing, and how it's mounted. Large mirrors should sit on a bottom J-channel with top clips or be set with solvent-free mirror mastic. One GTA installer lists installed custom mirrors with a polished edge at $16–$28 per square foot (2026).8 min read Shower Glass Door Repair: Hinges, Seals and Replacement PanelsMost shower door problems (a door that sags, drags or leaks) come from worn hinges, sweeps or seals, and these parts can be replaced if they match your glass thickness and hole pattern. You rarely need a whole new enclosure. If a tempered panel is chipped, cracked or etched, only that panel is replaced with a new safety-glass panel made to measure, which typically takes one to two weeks to fabricate.8 min read Why Tempered Shower Glass Shatters on Its Own (and How to Prevent It)Tempered shower glass that seems to explode on its own has usually been weakened long before, by a chip at an edge or hinge hole, metal-on-glass contact or a door that has been knocking into something. Much more rarely, a tiny nickel sulfide inclusion in the glass is to blame. The broken panel can't be repaired, so it's replaced on its own in the existing enclosure, and good hardware, prompt attention to chips and heat-soaked replacement glass all lower the risk of a repeat.7 min read

GUIDES · 07

Commercial

After a Break-In: Board-Up, Insurance and Security Film for BusinessesAfter a break-in, make the scene safe, report it to police, photograph everything before cleanup, and board up or secure the opening the same day, because your policy requires you to act to limit further damage. Notify your insurer promptly, keep every receipt, and file a sworn proof of loss, typically within 30 days. Then replace the broken glass in the existing frame with something that resists the next attempt: laminated glass or properly anchored security film.8 min read Storefront Glass Repair: A Toronto Business Owner's GuideMost broken storefront glass can be replaced glass-only in the existing aluminum frame: the store is secured or boarded up first, then the new pane is fabricated to size. The key decision is the glass: tempered is strong but falls out when it breaks, laminated stays in the frame and resists smash-and-grab, and insulated units suit thermally broken frames. One GTA contractor lists storefront door glass at $600–$1,200 and large display windows at $1,000–$3,000+ (2026).8 min read

GUIDES · 08

Rules & money

Broken Window in a Rental: Who Pays in Ontario?In Ontario, the landlord is responsible for repairing a broken window in a rental unit, because the Residential Tenancies Act requires the landlord to keep the unit in a good state of repair. The exception is undue damage caused wilfully or negligently by the tenant, someone living with them or a guest, which the tenant must pay to repair; a lease clause cannot shift the landlord's repair duty onto the tenant.7 min read Condo Window or Balcony Door Glass Broken? Who Pays in OntarioIn many Ontario condos, windows and balcony doors are common elements, often for your exclusive use, so the condo corporation is generally responsible for repairing and eventually replacing them. Your declaration decides, though, and if you or a guest caused the damage you may be charged the corporation's insurance deductible. Report broken or fogged condo glass to management before hiring anyone; the usual fix is a new pane or sealed unit in the existing frame, while changing the window or door itself needs board approval (usually a section 98 agreement).8 min read Do You Need a Permit for Glass Repair in Toronto or the GTA?Replacing the glass or sealed unit in an existing window frame doesn't change the opening, so it is generally treated as a repair rather than a window replacement. In Toronto, even a full same-size window replacement in a detached, semi-detached or row house with one dwelling unit needs no building permit; permits apply to window replacement in other building types (condos, multiplexes, mixed-use) and to new, enlarged or moved openings. Heritage districts have separate rules, and Markham and Newmarket exempt repairing broken panes to original specifications.7 min read Does Home Insurance Cover a Broken Window in Ontario?Usually yes, if the window broke suddenly: storm, vandalism, a break-in or an accident are generally covered by Ontario home policies, subject to your deductible and only while the home is normally occupied. Seal failure (fog between the panes), wear and tear and old age are not covered. Because typical deductibles run $500–$2,000, many single-window repairs cost less than the deductible, so a claim makes most sense after a break-in, a storm or damage to several openings.7 min read Window and Glass Repair Costs in Toronto & the GTA (2026 Guide)Most window glass repairs in the GTA cost between about $150 and $1,000 per opening in 2026: roughly $150–$300 for a small single pane and $350–$650 for a standard double-pane sealed unit, with tempered, oversized and after-hours jobs costing more. Keeping the existing frame is where the savings are: for comparison, the complete new window you avoid typically runs $600–$1,500 installed. These ranges come from published GTA contractor price guides dated April to September 2026 and generally exclude HST.8 min read Window Rebates in Ontario (2026): What They Cover vs Glass RepairAs of September 2026, Ontario's main window rebate, the Home Renovation Savings Program, pays $100 per rough opening for complete ENERGY STAR certified windows and doors, after a home energy assessment and with at least two eligible upgrades. Replacing only the glass or sealed unit generally doesn't qualify, but when frames are sound it usually costs less than a new window even after the rebate: about $350 to $650 per opening against $1,000 to $1,800 for full-frame replacement. The Canada Greener Homes Grant is closed.8 min read

GUIDES · 09

Safety glass

Tempered vs Laminated Glass: Where Ontario Requires Safety GlassTempered and laminated glass are both safety glass under the Canadian standard CAN/CGSB-12.1: tempered is 4–5 times stronger than ordinary glass and breaks into small granular pieces, while laminated cracks but stays bonded to a plastic interlayer. In Ontario homes, safety glass is required in shower and bathtub enclosures, sliding and storm doors, large low panes in entrance doors, and sidelights over 500 mm wide that could be mistaken for a door. When a safety-glass pane breaks, it can usually be replaced glass-only in the existing frame with a tempered or laminated pane made to size.7 min read

GUIDES · 10

Area guides

Broken glass after hours?

We're available 24/7 for emergency window and door glass repair across the entire Greater Toronto Area. We secure first with board-up, then complete permanent glass installation when you proceed with OhMyGlass Window and Door Repairs.

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