Your front door is the first thing people notice about your home — and one of the hardest-working parts of it. At GT Doors, we supply and install high-quality steel and fibreglass entry doors built to handle Ontario winters, cut down on drafts, and boost your home's curb appeal and resale value. Steel Entry Doors offer maximum security and energy efficiency at an affordable price point — a popular choice for Whitby and Durham Region homeowners looking for durability without the higher cost of fibreglass. Fibreglass Entry Doors replicate the look of natural wood grain without the maintenance, resist warping, denting, and rot, and hold up well against the moisture and temperature swings common in our area. Every installation starts with a free, no-obligation in-home measurement to make sure your new door fits perfectly and seals properly — no drafts, no callbacks. We proudly serve Whitby and surrounding communities including Ajax, Oshawa, Pickering, Bowmanville, and Clarington.