Grabill is known throughout the architectural community for their luxury custom windows and doors. The design possibilities are endless and range from historically accurate pivot windows to these contemporary bifolding doors. The current unit in progress is for a Southeastern Michigan residence and includes a single swing door and a 3 panel bifolding door. Constructed of the finest Mahogany, this door spans over 12 feet wide and 8 feet tall. As with all Grabill custom windows and doors, each unit can be constructed to match your exact specifications. For more info on Grabill Window and Doors products, please visit our website or call us at 810-798-2817.