+1-613-519-0200 | 0% Financing Available · Extended Plans Up to 60 Months
Canada's Top-Rated Window Replacement

Replace Your Windows.
Stop Paying for Bad Glass.

Factory-direct ENERGY STAR® triple pane windows & doors — custom-built in Ontario, installed by certified experts. Lifetime warranty. 0% financing. Serving communities across Canada.

Get Free In-Home Quote Calculate My Savings
Lifetime Warranty ENERGY STAR® Certified Factory Direct 0% Financing Available
Free · No Obligation

Get Your Free Quote

No high-pressure sales. Price-locked quotes.

ENERGY STAR®Most Efficient Certified
NAFS-22Certified Performance
Lifetime WarrantyRegistered & Transferable
0% FinancingUp to 12 Months · Plans to 60
Made in CanadaBuilt for Canadian Winters

Is It Time?

5 Signs Your Windows Are
Costing You Money

Old or poor-quality windows account for up to 30% of home heating and cooling loss. Recognize any of these?

High Energy Bills

Drafty windows force your furnace to work 40% harder in Canadian winters.

Drafts & Cold Spots

Feeling cold air near windows? Failed seals let heat escape continuously.

Condensation

Moisture between panes means the seal is broken — insulating gas has escaped.

Street Noise

Triple pane glass cuts outdoor noise by up to 50% vs. old double pane.

Hard to Open

Stiff or warped windows are a safety hazard in emergencies.

The Northline Collection

Every Style.
Every Home.

Our full lineup covers every window and door style — all custom-manufactured in Ontario, built to your exact specs with premium Canadian-grade materials.

Casement window replacement Canada
Best SellerER Rating 41ENERGY STAR Most Efficient

Casement Windows

The most energy-efficient window style available. When closed, the sash compresses tightly against the frame creating an airtight seal — virtually eliminating air leakage. Available in a 4½" deep frame profile (FlexScreen compatible) and a slim 3¼" profile for limited wall depth — custom built for your opening.

  • Triple pane LoE-180 — ER rating up to 41
  • Super Spacer® 100% foam — zero condensation at edge
  • 97% argon gas fill — 50% less heat transfer than air
  • Northline multi-point locking hardware — SecurePlus rated
  • Custom colours, sizes & interior finishes
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Engineering Excellence

Built for
-30°C Winters.

Standard double pane windows fail in Canada's climate. Our triple pane units are over-engineered with every available technology to protect your home — and lower your bills — year round.

1

Triple Pane LoE-180 Glass — ER up to 41

Three glass layers with dual Low-E coatings. An ER of 41 vs. a standard double pane ER of 28 — that's a 35% performance improvement.

2

Super Spacer® All-Foam Spacer

Unlike metal spacers that conduct cold to the glass edge, the 100% polymer foam Super Spacer® blocks heat transfer and eliminates edge condensation.

3

97% Argon Gas Fill

Argon conducts 50% less heat than air. Our units hit 97% fill — above the industry standard 90% — for maximum insulating performance.

4

Steel-Reinforced Multi-Chamber uPVC

Galvanized steel inserts inside the vinyl profile provide structural rigidity — preventing warping and enabling larger window configurations without deflection.

5

NAFS-22 Certified

All products meet the latest NAFS-22 structural performance standard — the strictest certification in Canada, updated from NAFS-11.

Triple pane window cross section Canada
Triple-Pane LoE Glass
97% Argon Gas Chambers
Super Spacer® Foam
Steel Reinforcement

↑ Hover blue dots to inspect

Energy Savings Estimator

How Much Are Your Old
Windows Costing You?

Old windows account for 25–30% of home heat loss. Adjust the sliders to see your estimated annual savings with triple pane replacement windows.

Your Home Details

8
125
15 yrs
5 yrs40 yrs
$2,400
$800$6,000

Estimated Annual Savings

$612

per year with Northline triple pane windows

Monthly Savings

$51

10-Year Savings

$6,120

Est. Payback Period

6.5 yrs

CO₂ Reduced / Year

0.8 t

Cumulative Cost Comparison (15 Years)

Estimates based on Natural Resources Canada data. Triple pane LoE windows reduce window heat loss by 25–50% vs. aged double pane. Actual results vary by home, installation quality, and climate zone.

Side by Side

Northline vs. The Alternatives

Not all window companies are equal. Here's how we compare on the things that actually matter.

Feature Best Choice Northline Big Box Store Generic Reseller
ManufacturingFactory Direct
Custom-Built in Ontario		3rd Party ImportVaries
Glass PackageTriple Pane LoE
ER 34–41		Double Pane
ER ~28		Double Pane
ER varies
ENERGY STAR RatingMost Efficient ✓
Highest tier		Basic CertifiedSometimes
NAFS-22 Certified✓ Yes✗ Rarely✗ Rarely
WarrantyLifetime
Registered & Transferable		10–20 YearsLimited
Installation TeamIn-House CertifiedSub-ContractorsSub-Contractors
Financing0% · 6–60 MonthsHigh InterestCash / Credit
Sizing100% Custom BuiltOff-the-ShelfSemi-Custom
Price TransparencyNo Hidden Fees
Price-locked quotes		Upsell PressureVaries
Get a Price-Locked Quote

Financial Flexibility

0% Financing.
Don't Pay a Penny More.

Start your upgrade today — we offer interest-free financing for qualified terms, plus extended payment plans to make any project work within your budget.

Monthly Payment Estimator

$8,000
$1,000$30,000

Your Monthly Payment

$333

For 24 months

Total: $8,000

Talk to Us About Financing

0% Interest — For Qualified Terms Best Rate

Our interest-free financing plan lets you spread the cost with zero added charges. Pay only what your project costs — not a penny more. Ask us about qualifying.

Extended Plans Available Up to 60 Months

Need a longer runway? We offer extended payment arrangements up to 60 months, so larger projects stay affordable no matter the budget.

Savings Can Offset Your Payment

In many cases your monthly energy savings will cover a significant portion of your monthly payment — making the upgrade nearly self-funding from day one.

Fast, Straightforward Approval

Our financing process is simple and quick. Get approval without lengthy paperwork so your project can start on schedule.

Our Process

From Quote to Completed Install

1

Free In-Home Consultation

A certified advisor visits, takes precise laser measurements, and delivers a price-locked quote — no pressure.

2

Custom Manufacturing

Your windows are custom-built to your exact specs at our partner factory in Ontario. Lead time: 2–4 weeks.

3

Professional Installation

Our in-house certified team installs, insulates, trims, and cleans. Most full-home installs complete in one day.

4

Warranty Registration

We register your lifetime warranty on your behalf — fully transferable to the next homeowner, adding real resale value.

Get In Touch

Upgrade Your Home.
Start Today.

Price-locked quotes, zero pressure. Serving communities across Canada — from our showroom to wherever you call home.

Showroom

1338 Wellington St. W

Ottawa, ON K1Y 3B7

Call Us

+1-613-519-0200

No hidden fees. No high-pressure sales. Price guaranteed.

Where We Work

Local Roots. Canada-Wide Reach.

Based in Ontario — serving homeowners from coast to coast with the same factory-direct quality and care.

Ottawa & NCR

  • Ottawa (All Areas)
  • Kanata
  • Barrhaven
  • Nepean
  • Orleans
  • Gloucester
  • Gatineau

Eastern Ontario

  • Kingston
  • Brockville
  • Pembroke
  • Smiths Falls
  • Carleton Place
  • Almonte
  • Kemptville

Ontario-Wide

  • Toronto
  • Hamilton
  • London
  • Windsor
  • Sudbury
  • Thunder Bay
  • Peterborough

Across Canada

  • Quebec
  • Alberta
  • British Columbia
  • Manitoba
  • Saskatchewan
  • Nova Scotia
  • New Brunswick

Not sure if we service your area? Give us a call — we likely do.

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