Window performance on this side-hung windows installation in Bolton depends on more than the frame profile. We start with internal making good and repair or finish internal reveals, sill zones and decoration interfaces around the new frame, with internal making good kept as the lead check for this side-hung windows scope. reveal dimensions is then coordinated through hinge side, handle reach, opening clearance, locking points and reveal depth, so we check internal and external reveal depths so trims, plaster and handle clearances can be coordinated, with internal making good kept as the lead check for this side-hung windows scope. Before final finishing, we review drainage paths and keep designed frame drainage routes clear through installation and external finishing, with internal making good kept as the lead check for this side-hung windows scope. We finish with locking points and align sash locking points and keeps so the window closes evenly around the frame, supporting side-hung windows with operation planned around the adjoining room, with internal making good kept as the lead check for this side-hung windows scope.