Capitall Windows is an Ottawa based window and door installation company. The owners have been in the window & door sales and installation business for over 15 years. Capitall Windows is a fully licensed & accredited business with highly competitive prices and very professional window & door installers. All of our windows & doors are from top quality North American manufacturers. We can offer your home an architectural design that delivers not only full energy efficiency but also absolute beauty. From sliders to casements, we offer a wide range of colours and styles that will compliment any home. Capital Windows Ottawa will reduce your energy costs for years to come, because all window frames & sashes are fusion welded for strength, providing a permanent air and water tight seal.