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
Vinyl and fiberglass replacement work is common in Crest Hill and New Lenox, where postwar-era subdivisions built up through the mid-twentieth century used simpler window openings than the East Side's older Queen Anne stock -- openings that are typically more straightforward to fit with modern vinyl or fiberglass units without extensive trim or sill rework.