For this whole-house replacement project in Wesham, opening checks, frame fitting and finishing are treated as one sequence. Sill Level leads the review, so we coordinate the frame base with the internal sill or window board and the external weathering detail, with sill level kept as the lead check for this whole-house replacement scope. We use drainage paths and locking points around multiple openings, room use, frame styles, access and making-good interfaces, ensuring we keep designed frame drainage routes clear through installation and external finishing and align sash locking points and keeps so the window closes evenly around the frame, with sill level kept as the lead check for this whole-house replacement scope. The last technical check is external making good; we finish external reveals, render or masonry interfaces around the installed frame, with sill level kept as the lead check for this whole-house replacement scope. This supports a consistent window package with installation details coordinated across several rooms.