| 摘要 |
A window unit (20) including a jamb extension assembly (28) is provided for use with fenestration products. The jamb extension assembly (28) includes a frame member (30) having structure to permit installation of the window unit (20) in a building wall rough opening. The frame member (30) presents inner, outer, rearward and forward portions (62, 64, 66, 68), and includes a jamb extender receiving slot (70) extending and opening rearwardly from the rearward portion (66) of the frame member (30). An elongated jamb extender (32) is provided and includes a transverse, extender flange (88) extending forwardly from an extender corner, and a trim flange (92) extending outwardly from the corner. The extender flange (88) is configured to slide in the slot (70). The extender flange (88) includes structure defining a plurality of longitudinally disposed lines of weakness being in the form of scores (94) disposed on an outer flange surface (96) to permit the length adjustment of the extender flange (88). The slot (70) is configured to conceal any gap (102) created between the forward edge (112) of the extender flange (88) and the rearward frame portion (66) when the extender flange (88) is disposed in the slot (70).
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