Crafting Calgary's
Finest Views
for Three Generations
Aluminum-clad wood and PVC windows — manufactured in our Calgary facility — paired with premium fibreglass and patio doors. Installed by our own in-house teams. Three generations of family values. Uncompromising quality since 1978.
Frames That Define
Your View
Our aluminum-clad wood windows feature clear hemlock interior frames with extruded aluminum exteriors — delivering the warmth of natural wood inside and maintenance-free durability outside. Available in 6 standard metal-clad exterior colours.
We also offer premium PVC windows with fusion-welded corners for superior air and water tightness. Both lines feature dual or triple-pane glass with Low-E coatings and Argon gas fill — engineered for Alberta's demanding climate.
Oversized combinations, special shapes, and custom architectural configurations — manufactured in our Calgary facility with Truth Encore hardware.
Explore Windows
First Impressions,
Lasting Quality
Function and security doesn't mean you have to compromise on style. Cossins offers fibreglass entry doors, metal-clad wood exterior doors, vinyl sliding patio doors, and metal-clad wood sliding patio doors — each fully customizable to your home's architecture.
Optional multi-point hardware adds a level of security with a guaranteed weather-tight seal and strong connection between door and frame. Multiple handle styles and colour options available.
From grand entry systems with sidelights and transoms to expansive sliding patio doors — every installation is handled by our own trained team.
View Door Collection
Banff Mountain Lodge
Banff, AlbertaComplete window and door package for a luxury multi-unit mountain lodge — timber frame, stone, and custom architectural glazing.
Projects Across Calgary & Beyond
Calgary Luxury Residence
Multi-level stone & dark siding
Calgary Infill Home
Custom entry door & modern facade
Grand Estate
Arched windows & columned entry
Shuswap Lake Residence
Lakefront estate, panoramic views
Keay Avenue Estate
Panoramic kitchen windows
Deer Creek Estate
Modern prairie home, winter
One Company.
One Standard.
"Bringing quality and pride to your project since 1978."
Three generations of the Cossins family have built this company on a simple belief: when sales, manufacturing, and installation work as one team under one roof, quality is assured at every step.
Our in-house installation teams are trained on every inch of our products. We manufacture UPVC vinyl, aluminum-clad, and traditional wood windows right here in Calgary, and prepare each door project in-house. This is the Cossins difference: from start to finish.
Comprehensive Solutions
Replacement Windows
Aluminum-clad wood and PVC windows with dual or triple-pane Low-E glass and Argon fill. 6 standard colours plus custom.
New Construction
Partner with us from blueprint to completion. Oversized combinations, special shapes, and custom architectural configurations.
Entry & Patio Doors
Fibreglass, metal-clad wood, and vinyl sliding patio doors with optional multi-point locking hardware for superior weather sealing.
Architectural Glass
Specialty glazing solutions including Low-E coatings, decorative glass, and custom configurations for any architectural vision.
Expert Installation
Our own trained in-house teams handle every installation — no subcontractors. Clean, efficient, and respectful of your home.
Consultation & Design
Visit our 18 St NE showroom or schedule a private in-home consultation. No pressure, just decades of expertise.
Leave It Up to Us
We understand that replacing windows and doors can feel daunting. Our goal is to make the process as easy and stress-free as possible — one team handling every step.
Consultation
In-home or showroom meeting to understand your vision, architecture, and requirements. No pressure, just expertise.
Design & Specify
Custom specifications developed with your input. Material selection, colour matching, hardware options, and technical planning.
Build & Prepare
Your windows are manufactured in our Calgary facility, and every product is prepared in-house for installation — quality assured at every step.
Installation
Our own trained installers handle every detail. Clean, precise, and respectful of your home. Think Cossins from start to finish.
The job your crew did exceeded my expectations. The windows look great and the crew did an amazing job of keeping everything neat and tidy, leaving nothing behind. Brian was also great to work with and probably gets the credit for us going with Cossins.
— Mike — Window Replacement
Proudly Calgary
Manufacturing and installing since 1978. Our facility, showroom, and entire team are right here in Calgary — serving homeowners across the city and surrounding areas.
Schedule a Private
Consultation
If you are considering replacing windows and doors in your home, think Cossins from start to finish. Visit our Calgary showroom or arrange a private in-home consultation — our experienced team will guide you through every option.
2908 18 ST NE, Calgary, AB
T2E 7B1
Tues–Thurs: 7:30am – 4:30pm
Mon & Fri: 7:30am – 4:00pm
(403) 291-3960
cossins@cossins.com