On this white uPVC windows project in Corwen, external making good is the first installation control and we finish external reveals, render or masonry interfaces around the installed frame. Kaizen Windows & Doors links reveal dimensions to frame colour consistency, trims, sealant, external finish and hardware, making sure we check internal and external reveal depths so trims, plaster and handle clearances can be coordinated, with external making good kept as the lead check for this white uPVC windows scope. We also review perimeter sealing before making good and form a continuous weather-resistant seal around the external frame perimeter, with external making good kept as the lead check for this white uPVC windows scope. Finally, trims is checked so we can coordinate internal or external trims with reveals, frame position and adjoining finishes, helping deliver a consistent white window package with perimeter finishes coordinated around the frames, with external making good kept as the lead check for this white uPVC windows scope.