Abstract: A sliding door unit having a stationary and a movable door panel has an improved sill which underlies and supports the door panels. The sill includes sill surfaces of different elevations for imposing a gravitational potential on any water seeking to infiltrate between the door panels. In addition, the sill includes a drain tank which operatively communicates with the highest sill surface for draining any water reaching that sill surface to an exterior side of the sill. The sill also includes an improved support member for supporting an outwardly extending threshold of the sill. Furthermore, the sill includes a guide system for guiding the stationary door panel into place during manufacture of the door unit.

Abstract: An improved weatherstrip for sealing the meeting stiles of a sliding door unit. The weatherstrip material comprises two, longitudinally elongated weatherstrip members. Each weatherstrip member has a substantially rigid base section which is fixedly secured to the stile. A first flexible leg extends out from the base section at an angle relatively thereto to resiliently engage corresponding legs on the opposed weatherstrip member. A second resilient leg may also be provided for sealing against the sides of the meeting stile.