For contemporary uPVC window package in Atherton, the technical sequence begins with sealant joints, so we allow a practical perimeter joint for movement and a neat external seal line, with sealant joints kept as the lead check for this contemporary windows scope. We then use glazing beads to coordinate mullion positions, frame proportions, fixed and opening panes, glass size and finish, and we check bead seating and corner joints after the glass is installed, with sealant joints kept as the lead check for this contemporary windows scope. Before closure, opening survey is reviewed and we check the existing opening, frame position and surrounding finishes before final dimensions are confirmed, with sealant joints kept as the lead check for this contemporary windows scope. The handover also covers fixing points; we position frame fixings to suit the opening, frame profile and surrounding substrate, with sealant joints kept as the lead check for this contemporary windows scope. Together these checks support a cleaner window composition with frame divisions planned around the elevation.