A novel and useful frame less supplemental window for fenestration suitable for use with existing windows. The supplemental window, in one embodiment, comprises plastic sheet material with bullnose edging around it. Corner braces add rigidity and strength to corners in several embodiments. An attachment mechanism secured either to the sheet material or the bullnose edge functions to fasten and/or seal the supplemental window to an existing window. The bullnose edging functions to substantially enclose (i.e. trap) a volume of air between the window pane and the plastic sheet material. The supplemental window is configured such that the layer of trapped air is of an optimum thickness within a preferred range of 0.15 to 0.75 inches to maximize thermal insulation properties of the supplemental window.

Provided is a frameless window assembly made from a sheet with resilient edge(s).

Provided is a frameless window assembly made from a sheet with resilient edge(s).

A retrofit window kit includes a plurality of magnetic sash elements configured to be positioned at one or more locations on an interior perimeter of the sash and a corresponding plurality of magnetic window grid elements each configured to magnetically couple to one of the magnetic sash elements and constructed as a clip or a cap that fits over and frictionally attaches to an exterior end of a window grid muntin.

A retrofit window kit includes a plurality of magnetic sash elements configured to be positioned at one or more locations on an interior perimeter of the sash and a corresponding plurality of magnetic window grid elements each configured to magnetically couple to one of the magnetic sash elements and constructed as a clip or a cap that fits over and frictionally attaches to an exterior end of a window grid muntin.

Provided is a door locking system including: a frame (10) including a hole (11) and a stopper hole (12), wherein the hole (11) is formed inside the frame (10), wherein a door glass (60) is fitted in the hole (11, wherein the stopper hole (12) is recessed from the hole (11) into a first sidewall of the frame (10); a captive bolt (20) inserted into the first sidewall of the frame (10) in a first direction toward the stopper hole (12); and a stopper (30) fitted in the stopper hole (12), wherein the second direction is perpendicular to the first direction.

Provided is a door locking system including: a frame (10) including a hole (11) and a stopper hole (12), wherein the hole (11) is formed inside the frame (10), wherein a door glass (60) is fitted in the hole (11, wherein the stopper hole (12) is recessed from the hole (11) into a first sidewall of the frame (10); a captive bolt (20) inserted into the first sidewall of the frame (10) in a first direction toward the stopper hole (12); and a stopper (30) fitted in the stopper hole (12), wherein the second direction is perpendicular to the first direction.

Various systems and methods are provided for controlling access to the insulated glass space of a fenestration unit. A hinge lug is provided including a lug body having a mounting portion, a cam portion defining a curved cam surface, and a retention portion projecting from the cam portion, and a first retention arm extending from the lug body such that the retention arm is elastically deflectable away from the retention lip. A restrictor link is provided including a restrictor link body having a first end and a second end, wherein the restrictor link body is elastically deflectable, a securing lock positioned proximate the second end, and a cap extending from the securing lock, the cap defining an engaging surface operable to engage the lip channel of the sash. A latch system is provided including a latch base with a ramp access aperture and a latch body including a ramp.

Various systems and methods are provided for controlling access to the insulated glass space of a fenestration unit. A hinge lug is provided including a lug body having a mounting portion, a cam portion defining a curved cam surface, and a retention portion projecting from the cam portion, and a first retention arm extending from the lug body such that the retention arm is elastically deflectable away from the retention lip. A restrictor link is provided including a restrictor link body having a first end and a second end, wherein the restrictor link body is elastically deflectable, a securing lock positioned proximate the second end, and a cap extending from the securing lock, the cap defining an engaging surface operable to engage the lip channel of the sash. A latch system is provided including a latch base with a ramp access aperture and a latch body including a ramp.

The present disclosure describes various embodiments of a concealed or hidden door closer that is installed in a rail of a door assembly. In some embodiments, the door frame and door closer components are configured to allow the door assembly to be readily installed as either a left or a right hand hinged door.