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Introduction

Diagram of a door frame. The following parts are labelled: head (the top of the frame), sill (the bottom) and jamb (the sides).External timber door frames are generally made by specialist joinery companies. The jambs and head of the door frames have two rebates. One accommodates the door, and the other accommodates a flywire door.

Some manufacturers also provide grooves in the back of the jambs for side flashing.