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Doors & Windows

Window Replacement in Ontario

Windows in Ontario earn their keep the hard way: forty-degree temperature swings between seasons, wind-driven rain, and winter condensation working at every seal. When the panes fog up between the glass, frames rot, or you can feel the draft from across the room, the window is done — and modern double- or triple-glazed units are dramatically better than what most houses got in the eighties and nineties.

There are two ways to replace a window, and the right one depends on the state of your frames. A retrofit insert slips a new unit into the existing frame — quicker, cheaper, less disruption, but you keep the old frame and lose a bit of glass area. A full-frame replacement strips back to the rough opening so the whole assembly, insulation and flashing are new. If your frames are rotted or leaking, a retrofit just wraps new glass around an old problem.

We replace single windows, do whole-house jobs, and handle the odd shapes too — bays, basement hoppers, and bedroom egress windows, which have Building Code minimum opening sizes worth checking before you order. Send photos of the worst windows inside and out for a free quote.

What this covers

  • Retrofit insert window replacement
  • Full-frame replacement to the rough opening
  • Vinyl and fibreglass window units
  • Double and triple glazing with Low-E and argon
  • Casement, slider, hung and fixed styles
  • Basement and egress windows
  • Bay and bow window replacement
  • Insulating, air-sealing and flashing the opening
  • Interior trim and exterior capping
  • Old window disposal

What affects the price

  • Retrofit insert versus full-frame — full-frame costs more and fixes more
  • Number of windows; whole-house jobs price much better per opening
  • Size and style: casements and bays cost more than fixed panes and sliders
  • Glazing package — triple pane and Low-E coatings add cost and comfort
  • Frame condition; rot repair around openings is a common extra in older homes
  • Second-storey and basement access, which affect labour time
  • Exterior finish: capping, brickmould and how the siding or brick meets the frame

Every home is different, so we don’t publish flat prices — the quote is free and based on your actual job.

Window Replacement near you

We take quote requests across Ontario. Local pages:

TorontoOttawaMississaugaBramptonCaledonHamiltonVaughanMarkhamRichmond HillAuroraNewmarketGeorginaWhitchurch-StouffvilleKingOakvilleBurlingtonMiltonHalton HillsOshawaWhitbyAjaxPickeringClaringtonKitchenerWaterlooCambridgeLondonBarrieInnisfilBradford West GwillimburyCollingwoodSt. CatharinesNiagara FallsWellandGrimsbyFort ErieGuelphWindsorKingstonGreater SudburyPeterboroughThunder BayBrantfordBellevilleSarniaWoodstockStratfordOrangevilleCornwallNorth BaySault Ste. MarieChatham-KentOrilliaWasaga BeachMidlandNew TecumsethSt. ThomasKawartha LakesCobourgPort HopePrince Edward CountyQuinte WestLeamingtonOwen SoundBracebridgeHuntsvilleNiagara-on-the-LakeTimminsBrockville

Common questions

My windows fog up between the panes. Can that be fixed without replacing them?
Fog between the glass means the sealed unit has failed and let moist air in. Sometimes just the glass unit can be swapped while keeping the frame — worthwhile on newer windows. On older units, seal failure usually arrives alongside worn hardware and tired frames, and replacement is the better spend. Photos let us tell you which.
Retrofit or full-frame — how do I know which I need?
Check the frames, not the glass. If the existing frames are square, dry and solid, a retrofit insert saves real money. If there's rot, water staining below the window, or drafts around (not through) the window, the problem lives in the frame and a full-frame replacement is the honest fix. A ten-minute inspection settles it.
Is triple glazing worth it in Ontario?
The case is strongest on north-facing windows, bedrooms where street noise matters, and anywhere you sit close to the glass in winter — triple pane's inner surface stays noticeably warmer. On a tight budget, a good double-glazed unit with Low-E and argon gets you most of the benefit; going triple everywhere is comfort spending as much as energy spending. Both are legitimate choices.
Can windows be replaced in winter?
They can, and installers do it all season. Each opening is exposed for a short window of time — usually under an hour per window — and rooms are done one at a time with the door closed. Winter scheduling is often easier to get, too. Extreme cold snaps are the only real limitation, mostly because sealants and foams have working temperature limits.
What are the rules for basement bedroom windows?
A bedroom needs an escape route, so the Building Code sets a minimum unobstructed opening size for egress windows — and window wells need enough clearance to climb out. If you're finishing a basement or adding a bedroom, size the window to the code before ordering, not after. It's also a genuinely good safety feature, not just paperwork.

Ready to sort out your window replacement?

Tell us what your home needs — a small fix or a full project — and get a free quote.

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