Kaizen Windows & Doors plans flush-sash uPVC windows in Liscard around details that are harder to correct after finishing. The first control is internal making good, and we 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 flush-sash windows scope. We then coordinate frame position through frame proportions, sightlines, opening sizes, glazing and external finish and set the new frame at a position that works with the reveals, sill and external finish, with internal making good kept as the lead check for this flush-sash windows scope. Perimeter Sealing is checked before closure, while gaskets is included in final handover. We form a continuous weather-resistant seal around the external frame perimeter and check glazing and sash seals for continuous seating before final handover, keeping the installation focused on a cleaner flush-sash appearance with the installation coordinated around the existing openings, with internal making good kept as the lead check for this flush-sash windows scope.