On this bay windows project in Coppull, frame dimensions is the first installation control and we confirm manufacturing dimensions against the surveyed opening before the replacement frame is ordered, with frame dimensions kept as the lead check for this bay windows scope. Kaizen Windows & Doors links head interface to bay geometry, frame angles, head support, sill or base line and internal reveals, making sure we coordinate the frame head with the retained lintel, cavity closure and internal reveal, with frame dimensions kept as the lead check for this bay windows scope. We also review perimeter sealing before making good and form a continuous weather-resistant seal around the external frame perimeter, with frame dimensions kept as the lead check for this bay windows scope. Finally, glazing beads is checked so we can check bead seating and corner joints after the glass is installed, helping deliver a bay-window assembly with linked frames aligned around the existing geometry, with frame dimensions kept as the lead check for this bay windows scope.