Sliding glass patio door sales, installation and repair across Whitby and Durham Region — styles, glass, energy efficiency, security and cost, from GT Doors.

If your front door sticks in the summer, lets in a draft in January, or just looks tired next to the rest of your house, you're not alone. Doors are one of the hardest-working parts of a home in Durham Region — and one of the most overlooked until something goes wrong. At GT Doors, we've spent more than 20 years helping homeowners across Whitby, Ajax, Oshawa, Pickering and the rest of Durham Region replace front doors, entry doors and sliding glass doors. This guide walks thr