Whitby's Trusted Source for Entry Doors & Sliding Doors
At GT Doors, we help homeowners across Whitby and Durham Region upgrade their homes with high-quality front doors, entry doors, sliding patio doors, and door glass. Every project starts with a free in-home measurement and quote, and ends with a professional installation built to last through Ontario's toughest seasons. Whether you're replacing a drafty old entry door, adding a new sliding patio door to open up your backyard, or just refreshing the look of your home's exterior, our team handles the details — accurate measuring, quality materials, and clean, precise installation. We proudly serve: Whitby, Ajax, Oshawa, Pickering, Port Perry, Bowmanville, Clarington, Stouffville, and Uxbridge.
Why Homeowners Choose GT Doors
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Free in-home measurements — no guesswork, no surprises
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Steel & fibreglass entry doors built for Canadian winters
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Energy-efficient sliding patio doors that cut down on heating and cooling costs
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Local, personal service across Whitby and Durham Region
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Straightforward, honest pricing with no pressure sales