Various aspects of the disclosure relate to modular sill systems for sliding panel doors and windows, collectively “sliding fenestration units.” In various examples, modular sill systems include multiple separate and distinct base components that provide tracks on which one or more panels are able to slide.

A prefabricated flashing product for an opening in an exterior surface of a structure includes a generally planar flange shaped to conform to the exterior surface, the flange extending outwardly from an entire perimeter of an aperture therein that corresponds to the opening, and a return that seals to the flange about the aperture and extends substantially perpendicularly therefrom toward an inward direction of the opening. The flange and the return are monolithically formed of a waterproof material. A method of integrating a fenestration product into an opening of an exterior surface of a structure includes inserting the flashing product described above into the opening, and inserting the fenestration product at least partially into the aperture of the flashing product.

A prefabricated flashing product for an opening in an exterior surface of a structure includes a generally planar flange shaped to conform to the exterior surface, the flange extending outwardly from an entire perimeter of an aperture therein that corresponds to the opening, and a return that seals to the flange about the aperture and extends substantially perpendicularly therefrom toward an inward direction of the opening. The flange and the return are monolithically formed of a waterproof material. A method of integrating a fenestration product into an opening of an exterior surface of a structure includes inserting the flashing product described above into the opening, and inserting the fenestration product at least partially into the aperture of the flashing product.

A door frame and threshold assembly, comprising a reservoir tube, including a first top surface comprising at least one inlet weep hole, a first rear surface, a first bottom surface, and a first front surface comprising at least one outlet weep hole, an interior sill portion, including a second top surface, a third top angled elevationally downward in a first direction, an exterior sill portion, including a fourth top surface angled elevationally downward in the first direction, a second rear surface engaged with the reservoir tube and spaced apart from the interior sill portion, and a third bottom surface, and a sill pan operatively arranged under and spaced apart from at least one of the first bottom surface and the third bottom surface, wherein the sill pan forms a conduit in fluid communication with the outlet weep hole.

A door frame and threshold assembly, comprising a reservoir tube, including a first top surface comprising at least one inlet weep hole, a first rear surface, a first bottom surface, and a first front surface comprising at least one outlet weep hole, an interior sill portion, including a second top surface, a third top angled elevationally downward in a first direction, an exterior sill portion, including a fourth top surface angled elevationally downward in the first direction, a second rear surface engaged with the reservoir tube and spaced apart from the interior sill portion, and a third bottom surface, and a sill pan operatively arranged under and spaced apart from at least one of the first bottom surface and the third bottom surface, wherein the sill pan forms a conduit in fluid communication with the outlet weep hole.

An assembly for a door or window frame including an elongated sill and a corner key attached to each end of the sill. The corner key includes a water chamber for collecting water therein and a plurality of ports for diverting water from the water chamber outwardly through a drain port. The water chamber and plurality of ports are designed to temper a high-pressure gradient in the sill and effectively promote water egress away from the sill.

An assembly for a door or window frame including an elongated sill and a corner key attached to each end of the sill. The corner key includes a water chamber for collecting water therein and a plurality of ports for diverting water from the water chamber outwardly through a drain port. The water chamber and plurality of ports are designed to temper a high-pressure gradient in the sill and effectively promote water egress away from the sill.

A sliding door or panel system is provided. The system can have a roller assembly that is mounted onto a sill. The system can have a moveable door or panel with a blade extending from a bottom rail of the door or panel. The blade can rest on the rollers and the rollers facilitate the door or panel moving longitudinally along the sill. The sill can be installed below a top surface of a floor, making the system less visible. The system can include a brush insert that protects against debris entering the sill. The brush insert can be removed from the sill to allow access to the rollers.

A sliding door or panel system is provided. The system can have a roller assembly that is mounted onto a sill. The system can have a moveable door or panel with a blade extending from a bottom rail of the door or panel. The blade can rest on the rollers and the rollers facilitate the door or panel moving longitudinally along the sill. The sill can be installed below a top surface of a floor, making the system less visible. The system can include a brush insert that protects against debris entering the sill. The brush insert can be removed from the sill to allow access to the rollers.

A drip cover for a fenestration unit. The fenestration unit includes a frame and a slideable panel supported for sliding movement within the frame. A gap is defined between the slideable panel and the frame. The drip cover includes a mounting member configured to attach to the slideable panel. The drip cover also includes an overhang that projects from the mounting member and that is configured to cover over the gap when the mounting member is attached to the slideable panel. The overhang is supported for resilient flexure relative to the mounting member between a neutral position and a flexed position. The overhang is resiliently biased toward the neutral position. The overhang, when the mounting member is attached to the slideable panel, is configured to contact a surface, thereby resiliently flexing the overhang between the neutral position and the flexed position, as the slideable panel slides relative to the surface.