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Free in-home estimates across Montreal · ENERGY STAR® windows and doors installed by our own crews
(613) 324-9141

Replacement · Basement

Montreal basement window replacement that stops the cold

Old steel basement frames rust, sweat and let the deep cold and damp into the room. We swap them for sealed vinyl hopper and slider units — Low-E glass, air-sealed with backer rod and low-expansion foam, and secured with cam locks.

  • Every opening measured on-site
  • Full air-seal on every unit
  • Written frame + sealed-glass warranty
Sealed vinyl hopper basement window replacement in Montreal

Why it matters

Stop the cold from old steel frames

Old basement windows are one of the biggest sources of drafts, leaks and cold in a home in Montreal, and the worst offenders are the rusted single-pane steel frames builders used for decades. Set low where snow-melt and spring runoff collect, they sweat, frost over and let damp air seep past failed glazing. We replace them with sealed vinyl hopper and slider units that keep the basement dry, warmer and secure.

Hopper units tilt in from the top for easy cleaning and ventilation, while sliders suit wider, shorter openings; both come with cam locks that are a real upgrade over the loose latches on old steel. For a bigger comfort gain across the house, ask about energy-efficient replacement or a double-pane upgrade.

Planning to finish the basement into a bedroom? Ask about egress windows — we enlarge the opening to code so the room is legal, or fit a straightforward retrofit replacement where the frame is sound.

Recent install
Basement Window Replacement — Montreal
Basement Window Replacement detail

How it works

From free estimate to installed — in four simple steps

  1. Book the estimate

    Call, text or use the form. We book a free in-home visit — no obligation, no high-pressure sales table.

  2. On-site measure

    We measure every opening, check the frames and sills for rot or water damage, and walk through material, style and glass options in plain language.

  3. Written quote

    Line-item quote with the window line, glass package, U-factor, warranty and haul-away on one page. Financing attached when you want it.

  4. Install, cleanly

    Drop cloths, boot covers and a full air-seal on every unit. Old windows hauled away and a walkthrough of your new windows plus warranty registration.

What you get

Sealed hopper and sliders, locked and dry

We flash and seal each basement window against water and air, set it with backer rod and low-expansion foam, and where needed tie it into a properly drained window well so runoff sheds away instead of pooling at the frame. Hopper and slider units come with secure cam locking, and we can spec tempered or laminated glass for a below-grade opening.

The written quote covers the window, the sealing and any drainage work as one job — one crew, one price, one warranty. If a whole-home upgrade makes more sense, we also handle full-frame replacement and energy-efficient windows, and you can browse every option under window replacement.

Basement Window Replacement detail
In writing Warranty
Triple-pane Glass
Air-sealed Install

Related services

More Montreal window replacement options

Other services our crews handle across Montreal.

Common questions

Montreal basement window replacement, answered

Hopper and slider units, security, leaks and egress.

Yes — if you want a legal basement bedroom, we can enlarge the opening in the foundation to the current code for clear size and sill height and install a compliant egress window and window well. That is a bigger job than a like-for-like swap because it involves cutting and framing the opening and setting a drained well, but it turns unusable space into a safe, rentable, permit-ready bedroom. If you are not adding a bedroom, a standard sealed replacement is the simpler fix. We will tell you which one your plan needs.
Usually a combination of old, warped frames, failed seals, and poor drainage outside the window. Water pooling in a shallow or clogged well runs straight at a tired frame and finds every gap, and single-pane units sweat and frost from the inside on top of that. We replace the unit with a properly sealed one, re-flash and air-seal the opening, and address the well drainage so runoff sheds away. Fixing the window without fixing the water is why some basement windows leak again — we handle both.
Yes — modern basement replacements come with secure multi-point or cam locking, which is a big upgrade over the loose latches on old units. Because below-grade windows are a target, we can also spec tempered or laminated glass, add security hardware, and make sure the well and any grate are sound, all while keeping the opening code-compliant if it doubles as egress. We will talk through the right balance of security and escape for your basement at the measure.
Sliders, awnings and hoppers are common below grade; for a bedroom we size a casement or slider to meet egress code so it doubles as an escape.
Yes — sealed, efficient units plus proper flashing and well drainage cut the condensation, drafts and leaks that plague old basement frames.

Real Montreal reviews

What Montreal homeowners say after basement install day

★★★★★ 4.9 · 118 reviews on Google
★★★★★

Our old basement windows leaked and let in cold. The new sealed units are dry, warm and lock up secure. Great fix.

D. Sauve
Homeowner, Montreal
★★★★★

Water used to pool at the old window every spring. They re-sealed and sorted the drainage — bone dry this year.

A. Randhawa
Homeowner, Laval
★★★★★

Swapped four tired basement windows for secure, efficient ones. The basement finally feels warm enough to use.

R. Gauthier
Homeowner, Longueuil
★★★★

Draft-free and much more secure than the rusty old frames. Clean, quick job.

M. Owusu
Homeowner, Gatineau

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Ready when you are

Book a free Montreal basement window replacement estimate

Book a free in-home measure and a written, itemized quote for basement window replacement anywhere across Montreal and the surrounding towns. Sealed against water and cold, secure, and — where you want a legal bedroom — sized to egress code, installed by our own crews. No subcontractors, no pressure.

Locally owned · Insured · ENERGY STAR® · Free written estimates