Windows & doors · definition
Self-adhered membrane lapped around a window opening in shingle fashion to drain incidental water out and away. The make-or-break of a leak-free install.
Source: Andersen Windows — Installing Windows for Continuous Water Control
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.