A door assembly consisting of a door already mounted within a frame is a unit ready for installation into a prepared doorway. The frame typically includes the side jambs, head jamb, and sometimes the doorstop moldings. This complete unit contrasts with purchasing a door slab alone, which requires separate frame construction and hardware installation.
These assemblies offer several advantages, including simplified installation, consistent alignment, and reduced labor costs. The pre-fitting ensures proper clearances and operation, minimizing on-site adjustments. Historically, their adoption streamlined construction processes, contributing to increased efficiency in residential and commercial building projects.
