Start with the house, not the product
Installation approach, flashing, sill condition, frame material, glass package, trim rework, and how much sun the wall gets under the oak canopy or in the open all matter as much as the window itself.
Build a complete scope
- The design pressure at this address and the approved product for it
- Whether the property sits in a district where exterior change is reviewed
- Each opening measured, since the older in-town stock is not standard
- Solar heat gain, which governs comfort here far more than U-value
- Flashing detail, disposal of removed units, and what is warranted
Gainesville context
The mechanism that matters here is heat and water rather than cold. Humid summers make solar heat gain through the glass the dominant comfort factor, which inverts the northern priority on insulating value. Heavy rain driven against a wall finds the gaps at trim, heads and sills that vertical drip never tests, so the flashing and air seal achieved at the opening decide how it ages far more than the unit specification does. Mature canopy keeps shaded elevations damp long enough that any shortcut shows quickly, and crawl-space construction under much of this housing means sill and framing condition is worth checking below the opening.