Start with conditions, not a product
How the sill handles sandy-soil drainage, how flashing performs in a humid Sandhills storm, and how the frame meets the existing opening matter more than the window's brand.
Build a complete scope
- Which housing category the property falls into, which changes the answer
- Whether historic-neighborhood sash is repairable rather than replaced
- Every opening measured, since older stock is rarely standard
- Solar heat gain and installation air sealing for humid summers
- Trim restoration, removal and disposal of old units, and warranty
Fayetteville context
Fayetteville's housing categories point in different directions here, and identifying which one applies is most of the decision. Military-era and postwar houses generally carry single-glazed aluminum or early insulated units where the frame rather than the glass is the thermal weak point, and because those neighborhoods were built out quickly, whole streets reach replacement age at roughly the same time. The historic neighborhoods are the opposite case: original wood sash there is frequently repairable, openings are rarely standard sizes, and paint layers in housing of that age may be lead-bearing, all of which can change the recommendation before a replacement is priced. What the local climate contributes is specific -- humid Sandhills summers make controlling solar heat gain and air-sealing the installation more consequential than insulating value, which reverses the advice written for colder regions.