Ottawa & Gatineau’s Window & Door Replacement Experts
Your licensed and accredited door and window replacement company in Ottawa & Gatineau. All products built by top-quality Canadian manufacturers for maximum thermal efficiency.
No obligation. We'll call to schedule your free in-home estimate.
Complete Window & Door Solutions for Ottawa Homes
Whether you need energy-efficient window replacements or a secure, striking front entry door, Capitall Windows delivers expert craftsmanship and factory-direct quality.
Ottawa Windows Replacement & Installation
Maximize winter heat retention and summer cooling with triple and double-pane vinyl windows engineered specifically for the harsh Ottawa/Gatineau climate.
Ottawa Front & Patio Door Replacement & Installation
Upgrade your home’s security, thermal seal, and curb appeal with custom steel, fiberglass, or patio entrance doors built for beauty and endurance.
Why Ottawa & Gatineau Homeowners Choose Capitall Windows
A straightforward, trust-first tradesperson approach. No pressure, no hype.
Licensed & Accredited
Quebec RBQ License # 5810-9810-01. Fully insured, certified installers for Ontario & Quebec.
Lifetime Warranty
Complete warranty coverage on frame, glass, and installation craftsmanship.
Top Canadian Brands
Directly partnered with premier Canadian manufacturers for maximum thermal efficiency.
Clean & Meticulous Crew
Polite, punctual installers who respect your home and leave zero mess behind.
What Our Clients Say About Our Windows & Doors
Verified 5-star Google and HomeStars reviews from local homeowners.
"We recently had our windows and doors installed, the experience was outstanding from start to finish. Eugenie and Alex the two installers who completed the work were exceptional — knowledgeable, professional and incredibly hard working. Their attention to detail and craftsmanship were obvious in every part of the installation."
"Capitall replaced our back door. The process from start to finish was professional. The installers were thorough, and clean. Great price too. We have already noticed a difference from our previous door. Would recommend to anyone looking for new doors! Fantastic!"
"A great company to work with. Capital windows gave me a fair price and did an awesome job at installing 3-pane windows at my home... The new 3-pane windows from Capital windows eliminated the condensation from my bedroom windows. Loved my experience!"
"Excellent experience with Capitall Windows and Doors. Starting with our sales person Marc, and right up until install, everything went smoothly. Product was what we ordered, everything fit perfectly and the install team were professional."
"We had our two kitchen windows replaced by Capital Windows, and the experience was excellent. The installers were professional, efficient, and very tidy. We have trusted Capital Windows for all our window replacements for years."
0% Financing Available – Start Your Project Today
Don't delay essential window and door repairs. Enjoy low monthly payments and flexible terms through Financeit with simple, instant approvals.
Stop In For A Tour Of Our Showroom!
Prefer to touch and test hardware before you decide? Come see our full range of operating windows, handles, glass options, and front entrance door styles in person.
Ready to Upgrade Your Windows & Doors?
Get your free, no-obligation quote today. Lifetime warranty, competitive prices, and certified local installation.