The short answer
Insert replacement generally keeps more of the existing frame; full-frame work removes more of the old assembly and can expose the opening. Ask what remains, what is removed, how air and water interfaces are handled, and which conditions would change the method.
| Compare | Insert | Full frame |
|---|---|---|
| Existing frame | More remains and must be suitable | More is removed for opening access |
| Quote question | How was retained condition verified? | Which opening and finish repairs are included? |
Sources
Sources
- Window Installation — U.S. Department of Energy
- How to Avoid a Home Improvement Scam — Federal Trade Commission
- Renovation, Repair and Painting Program for Consumers — U.S. Environmental Protection Agency