Replace when you see
- Condensation between glass panes (seal failure)
- Cranks or sashes that no longer lock or stay open
- Noticeable drafts at closed sashes
- Rotted sill or casing from years of splash-back
- Single-pane units in primary living spaces
Bundle with siding when you can
Opening the wall line once for siding is the cheapest time to set flanges, foam, and flashing correctly. We plan window and siding scopes together when the envelope needs both.