# Exterior wall construction

Indicates the primary material and surface treatment of a building's outer walls.

- API name: `exterior_wall_construction`
- Category: Property
- Type · unit: Text
- Individuals with a value: 135.3M (52.5%)
- Latest collection: Oct 1, 2026, refreshed monthly
- How values combine: Uses the first available of up to 2 source fields, in priority order. Fields come from the person and the address.
- Derivations:
  - Observed — the attribute is directly observed.

## Links

- [Catalog page](/catalog/v2/exterior_wall_construction)
- [Published statistics (JSON)](https://static.faraday.ai/figv2/exterior_wall_construction.json)
- [API reference](/docs/reference/getattribute)