Always keep Associative turned on. This ensures that if you stretch or modify the boundary walls, the chevron pattern automatically updates to fill the new shape.
AutoCAD includes a native (Herringbone) pattern. While technically a herringbone layout (where rectangular blocks meet at 90-degree angles) rather than a true chevron (where blocks are mitered to meet in a continuous V-shape), it is often an acceptable substitute for flooring and paving. Type HATCH in the command line and press Enter . In the Hatch Creation ribbon tab, expand the Pattern panel. Scroll down and select HERB . Click inside your closed boundary to apply the hatch. autocad chevron hatch
If you want to refine your drawing setup, please let me know: Always keep Associative turned on