For this new-build windows project in Wavertree, opening checks, frame fitting and finishing are treated as one sequence. Installation Access leads the review, so we plan handling and working access before existing frames are removed. We use reveal dimensions and fixing points around structural openings, cavity closures, damp interfaces, frame setting-out and render or masonry finishes, ensuring we check internal and external reveal depths so trims, plaster and handle clearances can be coordinated and position frame fixings to suit the opening, frame profile and surrounding substrate, with installation access kept as the lead check for this new-build windows scope. The last technical check is sealant joints; we allow a practical perimeter joint for movement and a neat external seal line, with installation access kept as the lead check for this new-build windows scope. This supports new-build windows coordinated with the surrounding wall construction before closure.