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Window replacement installation checklist

Final inspection for replacement-window sizing, opening condition, support, fastening, flashing, drainage, air sealing, operation, glass, exterior and interior finishes, and documentation.

4 items to check

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Window product, opening condition, safety requirements, and installation method match approval

Critical item

The window type, size, rating, glazing, operation, egress or fall-protection function where applicable, and replacement method should match approved requirements and the actual wall opening.

Frame is supported, square, securely fastened, and not distorted

Critical item

Sill support, shims, fasteners, frame anchorage, clearances, and adjustment should follow the window and wall-system instructions without bowing or racking the unit.

Sill pan, flashing, drainage plane, sealants, and air sealing are continuous

Critical item

The installation should manage exterior water outward and connect the opening to the wall drainage and air-control layers using compatible materials and sequence.

Operation, locks, glass, screens, trim, cleanup, and records are complete

The finished window should operate and lock normally, remain clean and undamaged, and include complete interior and exterior finishes, labels, warranty, and care information.

Use this checklist after a residential window replacement and before final acceptance. Full-frame, insert, fin, masonry, and other replacement methods require different water and air-control details.

Reference standards

  • Approved plans, written scope, adopted state and local codes, permit conditions, authority having jurisdiction requirements, and manufacturer installation instructions
  • Approved window order, energy and safety-glazing requirements, and opening details
  • Window, flashing, sill pan, membrane, sealant, fastener, foam, trim, cladding, and wall-system instructions
  • Tools

  • Written scope, selections, and change orders
  • Flashlight, camera, tape measure, and level
  • Product instructions, receipts, warranty, permit, and inspection records