Portage Ave basement window replacement — done right for our winters

Old basement windows leak air, water and security. We replace them with sealed, secure units — and can upsize to code-compliant egress where a bedroom is planned.

Every opening measured on-site

Full air-seal on every unit

Written frame + sealed-glass warranty

Seal out water and cold

Basement windows are one of the most common sources of drafts, leaks and security worries in a Portage Ave home, and they get ignored until water shows up on the floor or frost coats the glass. The old wood or steel units down there are usually single-pane, poorly sealed, and set low where snow-melt and spring runoff collect right against them. We replace them with sealed, durable, efficient units that keep the basement dry, warm and secure.

Because a basement window sits at or below grade, the seal and the drainage around it matter as much as the window itself — a great unit in a well that funnels water is still a leak.

Planning to finish the basement into a bedroom? Ask about egress windows — we can enlarge the opening to code so the room is legal and safe, not just dry.

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.

Secure, sealed, 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. Modern units come with secure locking, and we can add extra security features for a below-grade opening on request.

The written quote covers the window, the sealing and any well or drainage work as one job, so there is no coordinating separate trades — one crew, one price, one warranty.

Basement Window Replacement questions answered

Egress, leaks and security for basement window replacement.

Can you make my basement window an egress window?

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.

Why do basement windows leak?

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.

Are basement windows secure?

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.

What window styles suit a basement?

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.

Will new basement windows help with moisture?

Yes — sealed, efficient units plus proper flashing and well drainage cut the condensation, drafts and leaks that plague old basement frames.

Book a free Portage Ave basement window replacement estimate

Book a free in-home measure and a written, itemized quote for basement window replacement anywhere across Portage Ave 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

Real Portage Ave reviews

What Portage Ave homeowners say about us

★★★★★ 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, Portage Ave

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

A. Randhawa

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

R. Gauthier

★★★★

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

M. Owusu

Portage Ave basement window replacement — done right for our winters

Seal out water and cold

From free estimate to installed — in four simple steps

Book the estimate

On-site measure

Written quote

Install, cleanly

Secure, sealed, dry

Related window services

Full-Frame Replacement

Retrofit Replacement

Energy-Efficient Replacement

Storm Window Replacement

Basement Window Replacement questions answered

What Portage Ave homeowners say about us

Portage Ave window guides

How to Choose the Right Windows for Your Portage Ave Home

Book a free Portage Ave basement window replacement estimate