Start with the conditions, not the catalog
Flashing, sill condition, the frame material, glass package, trim restoration, and solar exposure all shape the result about as much as the window unit itself does.
Build a complete scope
- Existing conditions and likely cause
- Preparation and protection
- Materials, compatibility, and installation details
- Permits, testing, cleanup, and restoration
- Exclusions, warranty terms, and change-order process
Joliet context
Energy-performance gaps often trace back to construction era: the single-pane sash common in Crest Hill and New Lenox's postwar-era subdivisions, and the older glazing typical of downtown Joliet's building stock from the Rialto Square Theatre's 1926 construction period, both predate today's energy codes by decades. Matching a modern glass package to an older opening usually means addressing the frame and flashing detail as much as the glass itself.