Looking to replace an old, drafty front door or add a sliding patio door to your Oshawa home? GT Doors offers free in-home consultations and professional installation for homeowners across Oshawa, backed by quality steel and fibreglass door options built to last. Whether your home is an older Oshawa property in need of a full door and frame replacement, or a newer build looking for a style upgrade, our team measures precisely and installs cleanly — so your new door performs the way it should from day one.