Planning glossary
Water-control layer
The materials and transitions intended to drain or block liquid water as part of the enclosure.
Example
A window opening must connect flashing to the wall's water-control strategy rather than rely on finish trim.
Related concepts
Enclosure
The connected layers that separate indoor and outdoor conditions, including water, air, vapor, and thermal control decisions.
Read definitionSheathing
Panels or boards attached to framing as part of a wall, floor, or roof assembly, with structural and enclosure roles depending on design.
Read definitionRough opening
The framed opening prepared to receive a door, window, or other component, based on product instructions and installation requirements.
Read definitionUse the term in context
Definition boundaryThis planning definition is not a substitute for the definition in an adopted code, standard, contract, manufacturer instruction, or professional document. Confirm the controlling meaning for the project.