For window replacement in occupied home in Staining, the technical sequence begins with perimeter sealing, so we form a continuous weather-resistant seal around the external frame perimeter, with perimeter sealing kept as the lead check for this occupied-home window replacement scope. We then use installation access to coordinate removal sequence, floor protection, dust control, temporary closure and making good, and we plan handling and working access before existing frames are removed, with perimeter sealing kept as the lead check for this occupied-home window replacement scope. Before closure, opening survey is reviewed and we check the existing opening, frame position and surrounding finishes before final dimensions are confirmed, with perimeter sealing kept as the lead check for this occupied-home window replacement scope. The handover also covers packers; we support the frame at suitable points so fixing does not pull it out of line. Together these checks support a controlled replacement sequence that keeps completed rooms protected as work progresses.