|Specifies the material used for building wall structure, cladding, or both|
|Used on these elements|
|Status: in use|
|Tools for this tag|
The key building:walls=* has been used in two ways, often overlapping: 1) to describe the material used to construct the load-bearing structure a building's walls 2) for the outer surface material of building walls, also know as the facade or cladding. Often this key is used when the structural material is exposed or the same as the cladding.
Most uses are in Indonesia, where this key was suggested on the Mapping Guidelines page for a number of years. Simple buildings in this country may use the same material for the bearing structure and facade of the wall, eg brick, concrete, "wood" (frame and boards) or bamboo, so in this case the two meaning may be the same: the facade is the structure.
Consider using the more common key building:material=* to specify the cladding or facade material.
How to map
|Key||Value||Short description||Example image|
|building:walls||brick||Brick wall - usually exposed brick|
|building:walls||concrete||Concrete wall - exposed structural concrete|
|building:walls||wood||facade and walls made of wood boards and timbers|
|building:walls||bamboo||Bamboo walls - usually structural|
|building:walls||stone||Stone walls - structural|
|building:walls||glass||Glass facade - consider using building:material=* instead|
|building:walls||iron_sheet||Corrugated galvanised steel sheeting used as cladding / facade, usually over wood framing|
- building:material=* - common tag which specifically describes the facade or cladding material - consider using instead.
- building:structure=* - construction method used for building walls - may not be verifiable when there is cladding
- roof:material=* - the surface material of the roof
- Simple 3D Buildings - overview of tags for mapping 3D buildings - uses building:material=* instead.