At On Star Windows & Doors, we provide high-quality, energy-efficient replacement windows and doors to homeowners in the GTA. Our team of skilled professionals installs products that are laboratory tested and certified according to the Canadian Standards. We offer a wide range of styles and sizes to suit all our customers' needs, including awning, casement, sliding, bay, and bow, single-hung, double-hung, and more. Our products are known for their splendid appearance, energy saving, and security. We provide top-quality window replacement services to customers in Toronto, Ajax, Pickering, Waterloo, Cambridge, Kitchener, and Brantford.
The majority of customers praise On Star Windows for their professionalism, work quality, and customer service, resulting in highly satisfactory experiences.
However, one customer experienced issues with condensation and sealant leakage, and the company failed to respond to their concerns, potentially indicating a warranty issue.