A sliding patio door slides smoothly back and forth, making it a great addition to a room without expending any space. While hinged doors open inward or outward, sliding doors does not require swing room and can accommodate tight-fitted spaces. 

Sliding patio doors are crafted for smooth operation and beautiful design. Standard sliding patio doors open by sliding along horizontal tracks at the head and sill. A sliding door can be designed for either a right-hand or left-hand operation and can accommodate tight-fitted spaces. 

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SIMONTON STANDING SLIDING RAIL DOOR

MILGARD STANDARD SLIDING GLASS DOOR