On this coloured uPVC windows project in Upton, opening survey is the first installation control and we check the existing opening, frame position and surrounding finishes before final dimensions are confirmed. Kaizen Windows & Doors links cill projection to frame finish, trims, sealant colour, adjoining masonry or render and hardware, making sure we set the cill projection and end details to suit the opening and surrounding finish, with opening survey kept as the lead check for this coloured uPVC windows scope. We also review internal sealing before making good and close the internal frame perimeter cleanly before trims or making-good work is completed, with opening survey kept as the lead check for this coloured uPVC windows scope. Finally, external making good is checked so we can finish external reveals, render or masonry interfaces around the installed frame, helping deliver a coloured window finish coordinated with the surrounding external materials, with opening survey kept as the lead check for this coloured uPVC windows scope.