definition
strict definition
window frame manufacturer
A company that manufactures window frames separately from the facade and window glass suppliers.
Companies which manufacture window frames, when this is distinct from the facade supplier and the window glass manufacturer.
The product is the frame surrounding the window glass. The frame is supplied as a distinct product, rather than as glass or as an entire facade assembly.
A window manufacturer assembles the frame and glass into a window, while a glass fabricator makes the glazing material. The separate manufacture of the frame is the activity identified here.