Integrity All Ultrex Sliding Patio Doors deliver style, durability and an enticing, unobstructed view to the world around you. Whether you are walking out to a patio, deck or porch, you will appreciate the clean sightlines and smooth operation. The precision Ultrex frame stays true without sagging and misalignment that can plague vinyl patio doors to ensure your patio door glides smoothly and effortlessly for years to come.