Patent ID: 11933098
Assignee: PELLA CORPORATION
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A fenestration unit having an inner side and an outer side, the fenestration unit configured for installation in a rough opening in a structure defined by rough opening framing, the rough opening having an interior side and an exterior side and the rough opening framing having an interior face and an exterior face opposite the interior face, the fenestration unit comprising:
a frame having a perimeter;
a retention system coupled to the frame and operable to exert a retention force on the rough opening framing to maintain positive engagement of the fenestration unit with the rough opening framing and resist extraction of the fenestration unit from the rough opening upon insertion of the fenestration unit in the rough opening such that the fenestration unit remains stationary in the rough opening without use of fasteners, wherein the retention system is adjustable to accommodate space between the rough opening framing and the frame; and
an engagement system coupled to the frame, the engagement system configured to positively engage the interior face of the rough opening framing upon insertion of the fenestration unit in the rough opening from the interior side of the rough opening, the retention system being operable to maintain positive engagement of the retention system with the rough opening framing upon insertion of the fenestration unit in the rough opening from the interior side of the rough opening and without use of fasteners securing the fenestration unit to the rough opening framing.