Design an opening, not a hole
Coordinate the structural opening, frame size, panel joints, support steel, seals, sill and flashings before cutting.
Do not apply a universal gap or fixing spacing: wind load, orientation, opening size and the current system details govern the design.
Resolve the panel module
Lay out panels around openings to avoid narrow infills and weak joint intersections at corners.
Schedule numbered panels and include laps, returns and drips when measuring trims.
Measure and support before cutting
Mark both faces from common references, check diagonals and secure the panel and offcut.
Use the panel maker's approved cold-cutting tool, blade and speed; avoid methods that overheat coatings or throw hot swarf.
Clean and close exposed edges
Remove swarf immediately and repair coating damage only with the approved method.
Close exposed core with the specified channel or metal return so it is protected and provides a stable sealing surface.
Carry frame loads independently
Transfer frame weight, operation and wind loads into designed headers, jambs and sill supports, not merely the thin panel skins.
Check line, level and diagonals before closing trims; use compatible isolators, fasteners, washers and seals without crushing the panel.
Control air inside and rain outside
Provide a continuous interior air-control layer, compatible insulation in the joint and a durable weather layer outside.
Prepare clean, dry joints to the sealant manufacturer's dimensions and allow movement between panel and frame.
Drain the sill outward
Slope sill flashing outward with back and end dams plus a drip that projects water clear of the face.
Lap head and jamb flashings to shed water outward, and never block frame weeps or drained-cavity paths.
Inspect the complete assembly
Check operation, squareness, fasteners, seal continuity, sharp edges, swarf and drainage before access is removed.
Record products, framing, fixings, sealants, photographs and controlled water checks; resolve conflicts with the designer and manufacturer in writing.