See the Fortress Difference.

Quality Glass and Windows with 10-Year Peace of Mind.

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Serving Calgary and Southern Alberta homeowners

Tired of Living With Problem Windows and Glass?

Whether it is your home or your business, you see it every day:

  • Fogged or cracked glass

  • Drafts and rising energy bills

  • Doors and windows that stick or do not close properly


Then the “solutions” start:

  • High pressure reps pushing one supplier and “today only” deals

  • Quotes that demand you replace everything at once

  • Contractors who vanish when issues show up after install


You deserve better. You deserve real choices, clear pricing that fits your budget, energy efficient and secure solutions, and crews who treat your property like their own. That is what Fortress Roofing, Exteriors & Glass is here to deliver.

Our Simple 3 Step Process

Step 1

Free Glass & Window Assessment

A Fortress glass specialist inspects your affected windows, doors, or glass units, then explains what they see and whether you need repair or replacement at different material and price points. No pressure, just honest advice.

Step 2

Clear Options, Quote, and Timeline

You receive a straightforward quote outlining the recommended solution (glass only or full frame), energy efficient and security focused options, and a realistic installation timeline. If it is storm or insurance related, we document damage and coordinate with any roofing or exterior work.

Step 3

Professional Installation and Follow Up

Our installers protect your home, remove old units safely, prep and insulate openings, install and seal new glass, and clean up before we leave. We walk the job with you and, if anything feels off later, you call us. If it is not right, we make it right.

Real People Who Give a Damn

With Fortress, you are not just “a window job.”

  • We listen to your story and why you are replacing, what is bothering you, and what matters most (comfort, safety, appearance, energy bills, or all of the above).

  • You get a dedicated point of contact who keeps you informed from quote to completion.

  • If something changes or you are worried about an opening, we explain what is happening and what we are doing about it.

Our goal is simple: you feel heard, respected, and at ease in your own home.

Results You Can Trust

Behind every piece of glass we install is the same Fortress standard that built our roofing and exteriors reputation:

  • 25 years serving Calgary and Southern Alberta homeowners

  • A+ Better Business Bureau rating

  • Glass and window solutions chosen for durability, safety, and performance

  • Work backed by our workmanship guarantee and real aftercare, not a “disappear after payment” approach

Trust is earned through what we do when something goes wrong, not just when everything goes right. If there is ever an issue, we own it and fix it.

More Than a Pane:

One Team for Glass, Windows, and Exteriors

Your windows and glass are connected to your roof, siding, trims, doors, and other exterior details. Because Fortress also handles roofing and full exteriors, we can:

  • Fix issues where glass, frames, and exterior finishes meet

  • Coordinate projects that involve roofing, siding, and glass

  • Make sure everything ties together for a clean look and better performance

If your glass damage is part of a hail or insurance claim, our insurance savvy team can support the entire scope, not just the windows. One call gets you a coordinated plan for your glass, your windows, and the rest of your exterior so nothing slips through the cracks.

Don't Let Energy Bills Keep Rising

Ready to Upgrade Your Glass or Windows?

Southern Alberta winters are tough on old windows, and energy costs aren't getting any cheaper. Whether you're dealing with drafty windows, planning energy-efficient upgrades, or managing multiple properties, Fortress Windows & Glass is here to help.

Get your free, no-obligation consultation today and discover why Southern Alberta homeowners and property managers have trusted us for over two decades.

  • Free consultation with honest assessment

  • Multiple supplier options to fit any budget

  • 10-year workmanship guarantee

  • A+ BBB rating and 24 years of experience

  • In-house installation team (never subcontractors)

About Fortress Glass

Since 2001, Fortress Roofing, Exteriors & Glass has been Southern Alberta's premier exteriors contractor, and we're the only company in the city with a dedicated, in-house windows and glass team. We serve homeowners, landlords, and property managers throughout Calgary, Airdrie, Lethbridge, Cochrane, Okotoks, and surrounding communities. We specialize in:

  • Residential Window Replacement & Installation

  • Energy-Efficient Window Upgrades

  • Multi-Family & Commercial Glass Solutions

  • Custom Glass Applications

  • Storm Damage Window Repairs

  • Skylight Installation & Replacement

Our mission is simple: treat every window installation like it's our own home. With best-in-class certifications, an A+ Better Business Bureau rating, and a track record of community impact, we're more than just contractors - we're your neighbors, committed to keeping Southern Alberta homes comfortable and energy-efficient.

What sets Fortress Glass apart:

  • 24 years of Southern Alberta exteriors experience

  • Only company with dedicated, in-house windows team

  • Multiple supplier relationships = more choices for you

  • 10-year "no excuses" workmanship guarantee

  • A+ BBB rating and best-in-class certifications

Frequently Asked Questions

How long does a typical window replacement take?

Most residential window installations take 30 minutes to 1 hour per window for standard replacements. A whole house typically takes 1-2 days, depending on the number of windows and any customizations required. We'll provide a specific timeline during your free consultation and keep you updated throughout the project.

What if I can't afford to replace all my windows at once?

Unlike companies that push expensive whole-house packages, we work with your actual budget. We can prioritize the most important windows first (like those facing harsh weather or in main living areas) and create a phased replacement plan. Our multiple supplier relationships mean we have options at every price point.

What's included in your 10-year workmanship guarantee?

Our guarantee covers all installation-related issues for a full 10 years. If any problems arise due to our workmanship, we'll return and fix them at no cost to you. This is in addition to manufacturer warranties on materials. Because we use our own in-house team (never subcontractors), you can count on us being here to honour that guarantee.

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