Windows · Installed across Alberta

Windows engineered for Alberta winters - and Alberta views.

From single-window replacements to whole-home retrofits, DWS installs energy-efficient vinyl windows built for chinooks, hail and -40°C cold snaps. Every install is finished by our own crew with proper flashing, foam and trim - not subcontracted out.

Large black-frame picture window on a stone and stucco home

Built for -40°C

Triple-pane, Low-E, argon-filled units that hold heat through the coldest Alberta nights.

Energy Star certified

We spec windows that meet or exceed Energy Star Northern Zone requirements.

Proper flashing & foam

Every opening gets full perimeter sealing and flashing - no shortcuts behind the trim.

Over 30 years experience

Three decades replacing windows across Calgary, Airdrie and Rocky View County.

What we install

A window for every opening.

We install the styles Alberta homes actually need - and we'll help you mix and match operable and fixed units to get the light, ventilation and view you want, without blowing the budget.

Casement & Awning Windows

Casement & Awning Windows

Our most popular replacement style - casements crank open for full ventilation and seal tight against Alberta wind. Low-profile vinyl frames with crisp white interiors and a colour-matched exterior trim.

  • Triple-pane Low-E glass
  • Multi-point locking hardware
  • Argon-filled sealed units
Picture & Fixed Windows

Picture & Fixed Windows

Maximize the view and the light. We custom-build picture windows for gables, stairwells and great rooms - often combined with operable casements above or below for ventilation.

  • Slim sightlines, more glass
  • Tempered options for safety
  • Custom shapes & transoms
Sliders & Modern Black-Frame

Sliders & Modern Black-Frame

Clean horizontal sliders for bedrooms and modern black exteriors that pair beautifully with dark siding and stucco. Practical, easy to operate, and built to last.

  • Black or bronze exterior options
  • Lift-out sashes for easy cleaning
  • Energy Star certified

Energy & comfort

Lower bills. Quieter rooms. No more cold drafts.

Replacing aging single or double-pane windows is one of the highest-impact upgrades you can make to an Alberta home. Modern triple-pane units with warm-edge spacers cut heat loss dramatically, knock down outside noise, and eliminate the cold-glass downdraft that makes a room feel chilly even when the thermostat says otherwise.

  • Up to 50% less heat loss vs. older double-pane
  • Condensation-resistant warm-edge spacers
  • Low-E coatings tuned for our climate zone
  • Acoustic glass options for busy streets
Dark exterior siding with modern white-frame slider windows

Our process

From measure to final caulk bead.

  1. 01

    In-home measure

    We measure every opening, discuss style and glass options, and answer your questions on-site.

  2. 02

    Transparent quote

    Itemized pricing for each window - no pressure, no upsell, no expiring discounts.

  3. 03

    Professional install

    Our crew removes old units, inspects framing, foams and flashes, then sets and trims your new windows.

  4. 04

    Walkthrough & warranty

    We walk every window with you, confirm operation, and register your manufacturer warranty.

Recent installs

Windows we've installed across Alberta.

View full gallery →
Bay window with custom bench seat installed in living room
Bay window installed mid-renovation with house wrap and trim ready for siding

Ready for warmer, quieter rooms?

Book a free, no-pressure window consultation. We'll measure, recommend, and quote - usually within a week.

Request your quote