Core terms · definition
The framed gap left in a wall to receive a window, door, or unit, sized slightly larger than the product to allow shimming and squaring during installation.
Source: InterNACHI — Inspection Glossary: Rough Opening
Where this term lands on a Columbus budget
The cost pages carry the current local ranges, and the guides explain what moves them. A published range becomes a project number only after someone looks at the site.