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
- What is installed now, and whether the older sash is repairable
- Whether paint layers in pre-war housing affect how work may proceed
- Each opening measured rather than ordered from a schedule
- Frame and glazing chosen for a cold-winter, hot-summer swing
- Air sealing, trim restoration, disposal, and the warranty on both
Joliet context
Opening and trim repair comes up most often on Joliet's older building stock -- the East Side's 1852-1873 Queen Anne-era homes and the downtown core tied to the city's 1834 original plat -- where a century-plus of settling, moisture, and prior repairs can leave sills, jambs, and trim needing attention before any new window can be set correctly.