Montreal new construction windows set before the siding

Building an addition, garage or new home? New-construction windows carry a nailing fin that fastens into the framing and laps with the house wrap, so the opening drains and air-seals.

Every opening measured on-site

Full air-seal on every unit

Written frame + sealed-glass warranty

Nail-fin windows built into the wall

New-construction windows fasten through a nailing fin into the wall framing before the siding or brick goes on, so the fin laps correctly with the house wrap and flashing tape. Done in the right order, that creates a continuous drainage plane and air seal around the whole window — water sheds to the outside and the deep-cold wind stays out of the stud bay.

Sequencing is everything, so we coordinate with your framer and cladding schedule: the window goes in after the wall is sheathed and wrapped but before siding, the fin is taped in a shingle-lap pattern, and the interior gets a proper backer-rod-and-foam air seal — not just a bead of caulk.

This is the approach for additions, garages and rebuilds — any time the wall is open to the framing. If your walls are already finished and you are swapping old units, a retrofit replacement or full-frame replacement fits better, and you can compare every option under window replacement.

From free estimate to installed — in four simple steps

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.

Built to code, sealed from the start

We coordinate with your build schedule and install to code — proper flashing, a taped nailing fin and a full interior air-seal — so the envelope is tight from day one and passes inspection without a fuss. Our crews work alongside your builder, not around them, and hit the window stage on time so the trades behind us are not held up.

The written quote covers the windows, the flashing materials and the install, with the glass package and U-factor spelled out per opening. Every window carries the same written frame-and-glass warranty we put on full-frame replacement, and the open wall is the easiest time to add picture windows, a bay or bow, or a code-sized egress window.

Montreal new construction windows, answered

Nail-fin vs replacement, working with builders, and styles.

What is the difference from replacement windows?

New-construction windows have a nailing fin — a flat flange around the frame — that fastens into the wall framing before the siding or brick goes on, so they are used when the wall is open to the studs on a new build, addition or rebuild. Replacement windows have no fin and drop into an existing, finished opening without disturbing the cladding. Same glass and styles, different install method — we use whichever suits the state of your walls, and on a renovation that is often a mix of both.

Can you work with my builder?

Yes — we work with builders, general contractors and owner-builders all the time, and coordinating with your trade schedule is part of the job. We confirm the rough-opening sizes, agree on the flashing and house-wrap details up front, and slot our install between sheathing and siding so nothing gets held up or done out of sequence. You get one written quote and one crew responsible for the windows, so if an inspector has a question about the fin or the flashing, it is our answer to give.

Which styles are available?

All the same styles as replacement — casement, awning, double-hung, picture, slider, and bay or bow — in vinyl, fiberglass or wood, with double- or triple-pane ENERGY STAR® glass. Because the wall is open, a new build is also the easiest time to add large picture windows or a bay for light and view, or to size a basement opening for code-compliant egress. We help you match the style, glass and U-factor to each elevation at the quote stage.

When in the build do the windows go in?

After the wall is sheathed and wrapped but before siding, so the nailing fin laps correctly with the house wrap and flashing.

Do you supply the flashing and sealing materials?

Yes — the written quote covers the windows, the flashing and the air-sealing, so your builder is not sourcing extras mid-build.

Book a free Montreal new construction windows estimate

Building or renovating in Montreal or the surrounding towns? Book a free measure and a written, itemized quote for your new-construction windows — coordinated with your build schedule, installed to code with proper flashing, and backed by a written frame-and-glass warranty. No subcontractors, no pressure.

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

Real Montreal reviews

What Montreal builders and homeowners say on install day

★★★★★ 4.9 · 118 reviews on Google

★★★★★

Used them on an addition and they coordinated perfectly with our framing and cladding schedule. Fin and flashing done by the book.

P. Villeneuve

Builder, Montreal

Building our new home and they slotted right in between sheathing and siding. Clean, code-correct install and it passed inspection easily.

M. Sran

Homeowner, Montreal

One written quote, one crew responsible for the windows, and they hit the schedule. Made my build easier.

J. Cote

General contractor, Montreal

Garage build with big new-construction units. Properly integrated with the weather barrier and tight as can be.

S. Hassan

Montreal new construction windows set before the siding

Nail-fin windows built into the wall

From free estimate to installed — in four simple steps

Book the estimate

On-site measure

Written quote

Install, cleanly

Built to code, sealed from the start

More Montreal window replacement options

Full-Frame Replacement

Retrofit Replacement

Energy-Efficient Replacement

Storm Window Replacement

Montreal new construction windows, answered

What Montreal builders and homeowners say on install day

Montreal window guides

How to Choose the Right Windows for Your Montreal Home

Book a free Montreal new construction windows estimate