Montreal retrofit window replacement — trim stays put

Retrofit replacement sets a new, efficient window straight into your sound existing frame — no torn-out siding, no ripped interior trim, most openings done in under an hour.

Every opening measured on-site

Full air-seal on every unit

Written frame + sealed-glass warranty

Retrofit inserts — fast, tidy, trim intact

If your existing frames and sills are solid, a retrofit insert is the fast, tidy way to upgrade: we fit a new window into the sound frame without pulling siding, brick-mould or interior trim. Most standard openings take well under an hour, so a whole home goes from drafty to sealed in a day or two.

You get the same triple-pane, air-sealed window you would in a full-frame replacement — the only difference is how little of the opening we touch, which keeps the interruption to your home small.

It is the ideal route for a whole-home energy-efficient upgrade or a single-pane upgrade where the frames are in good shape. Browse every replacement option at the measure.

Four steps from free measure to retrofit install

Book the estimate

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

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.

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.

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.

New glass, old frame, minimal mess

We seal the new unit into the sound frame with backer rod and low-expansion foam for a tight, draft-free fit, adjust and test the operation, then finish the interior stops cleanly. It performs like new even though your original frame and exterior caulking stay in place.

The written quote confirms the glass package, the U-factor and the exact scope, and every window carries a written frame-and-glass warranty. If a frame turns out to be rotted we will flag full-frame replacement instead, and we can pair the job with patio door installation or other replacement work.

Montreal retrofit replacement, answered

Retrofit versus full-frame, timing and the finished look.

Is retrofit as good as full-frame?

When the existing frame is sound, yes — a retrofit gives you the exact same efficient new window and glass as a full-frame job, sealed just as tightly, with far less mess, time and cost. The only thing full-frame adds is rebuilding the opening itself, which you only need when the frame or sill is rotted, water-damaged or out of square. So retrofit is not a compromise on a healthy opening — it is the smart choice. We check the condition of your frames at the measure and only recommend full-frame where it is genuinely needed.

How long does a retrofit take?

Most standard windows take 30 to 60 minutes each once we are on site, so many homes are completed in a single day, and larger homes in one to two. Because a retrofit does not disturb the siding or exterior trim, there is far less prep and cleanup than a full-frame job, which keeps the schedule tight. We give you a realistic day count in the written quote, confirm it before your windows are ordered, and work efficiently so your home is buttoned up quickly with minimal upheaval to your day.

Will it look different from the outside?

Minimal change from the outside — a retrofit keeps your existing exterior frame and trim, so the sightlines and the look of the house stay consistent. The new window nests inside the old frame, which slightly narrows the visible glass, but for most homes the difference is barely noticeable and the fresh, clean units actually improve the appearance. If matching the exact original glass area matters, or if the old frame is not up to it, we will talk through whether full-frame is worth it. Either way we finish the trim neatly.

Does a retrofit disturb my siding or trim?

No — a retrofit sets the new unit into the existing frame from inside, so the exterior siding and trim stay untouched, which keeps it fast and tidy.

Will a retrofit be as efficient as full-frame?

Yes — the window and glass are identical; the only difference is that full-frame rebuilds the opening, which you only need if the frame is damaged.

Get your Montreal retrofit replacement quote in writing

Book a free in-home measure and a written, itemized quote for retrofit window replacement anywhere across Montreal and the surrounding towns. Efficient new windows, minimal mess, most homes done in a day, and a written frame-and-glass warranty — installed by our own crews. No subcontractors, no pressure.

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

Real Montreal reviews

What Montreal homeowners say after install day

★★★★★ 4.9 · 118 reviews on Google

★★★★★

Frames were solid so they retrofitted new efficient units right in — no torn-up siding, whole house done in a day.

D. Michaud

Homeowner, Montreal

Fast, tidy and minimal mess. Same modern triple-pane glass without the cost of a full frame job.

A. Toor

Homeowner, Laval

They checked the frames were sound before recommending retrofit. Efficient, clean and easy on the budget.

R. Girard

Homeowner, Longueuil

★★★★

In and out with barely any interruption and the windows perform like new. Great value.

M. Balogun

Homeowner, Gatineau

Montreal retrofit window replacement — trim stays put

Retrofit inserts — fast, tidy, trim intact

Four steps from free measure to retrofit install

Book the estimate

On-site measure

Written quote

Install, cleanly

New glass, old frame, minimal mess

More Montreal window replacement options

Full-Frame Replacement

Energy-Efficient Replacement

Storm Window Replacement

Basement Window Replacement

Montreal retrofit replacement, answered

What Montreal homeowners say after install day

Montreal window guides

How to Choose the Right Windows for Your Montreal Home

Get your Montreal retrofit replacement quote in writing