Window Replacement Kitchener & Waterloo

When you think of giving your home an incredible look, ON Star Windows & Doors is the best choice in Kitchener and Waterloo. Our first-class doors and windows are installed professionally by our skilled and experienced installers. All of our installers are trained in the procedures for all types of installations and are professionals in their field.

We ensure your peace of mind with a warranty on all our doors and replacement windows in Kitchener. Our customers’ satisfaction is our top priority and our reputation depends on it.

ON Star Windows & Doors, Kitchener offers sliding patio doors and front entry doors to compliment different architectures and improve the appearance and value of your home. Whether you are looking to install patio doors for the first time or are thinking about window replacement, we offer high-quality, energy efficient and durable products.

We take pride in installing the finest quality doors and replacement windows in Kitchener and our products include:

Awning Windows

Bay and Bow Windows

Hung Windows

Casement Windows

Slider Window

Picture and Shape Window

Entry Doors & Patios Doors


If you’re looking to enlarge your indoor space, Bay and Bow Windows are the best option to make a connection between the home interior and the outdoors by allowing ample light from every angle. While the slider windows offer better ventilation and lighting, in addition to providing you with a wide and unobstructed view. Whatever your needs are, call us and we will take care of the rest!