Window performance on this bow windows installation in Walkden depends on more than the frame profile. We start with sill level and coordinate the frame base with the internal sill or window board and the external weathering detail, with sill level kept as the lead check for this bow windows scope. frame alignment is then coordinated through frame segmentation, connectors, sill line, head interface and internal finishing, so we check the frame for line, level and square before glazing and final tightening, with sill level kept as the lead check for this bow windows scope. Before final finishing, we review glass specification and match glazing type and pane configuration to the intended room use and project specification, with sill level kept as the lead check for this bow windows scope. We finish with external making good and finish external reveals, render or masonry interfaces around the installed frame, supporting a multi-frame bow arrangement coordinated as one installation rather than separate windows, with sill level kept as the lead check for this bow windows scope.