Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by function]
6. building materials
7. finishing (building material)
8. siding

Anotations

Scope note:

Building siding constructed from a type of board bevelled toward one edge. Clapboards are attached overlapping each other horizontally, they are thinner at one edge, each board being made to overlap that below it.