Abstract: Installation systems and methods for fenestration units configured to be set into a rough opening (RO) from interior side of a building structure or wall. The fenestration units may include a retention system coupled to the frame and operable to exert a retention force on the fenestration unit 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 from the interior side of the rough opening.

Abstract: A fenestration unit is configured for installation in a rough opening in a structure defined by rough opening framing. The fenestration unit includes a frame including a channel and a first mounting bracket. The first mounting bracket includes a first leg and an interlocking cam coupled to the first leg. The interlocking cam is configured to be received in the channel of the frame, and the interlocking cam is pivotable from an unlocked configuration to a locked configuration. In the unlocked configuration, the interlocking cam permits detachment of the first mounting bracket from the frame, and in the locked configuration the interlocking cam secures the first mounting bracket to the frame. The first mounting bracket further includes a second leg coupled to the first leg. The second leg is angularly offset from the first leg and is configured to abut an interior face of the rough opening framing.

Abstract: Installation systems and methods for fenestration units configured to be set into a rough opening from interior side of a building structure or wall. The fenestration units may include a frame having a perimeter including a first jamb, a second jamb, a frame head defining a first channel along a length of the frame head, a lower rail. The fenestration may further include at least one anchoring clip including a first anchoring clip coupled to the perimeter of the frame at the first channel. The first anchoring clip may include a coupling bracket having a first leg and a second leg, and a carrier bracket configured to receive a portion of the first leg, the coupling bracket defining at least one non-penetrating feature configured to be received by the first channel to couple the first anchoring clip to the perimeter of the frame.

Abstract: Installation systems and methods for fenestration units configured to be set into a rough opening from an interior side of a building or wall. The fenestration units may include a retention system coupled to the frame and operable to exert a retention force on the fenestration unit 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 from the interior side of the rough opening.