Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. [protective processes and techniques]

Anotations

Scope note:

The practice of placing soil and turf on the tops of historic walls as a preservation strategy. Traditionally, “hard caps” of cement have been used, but are not as effective in extreme weather, especially harsh frosts.