Tag:building=roof

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building = roof
Description
A building open on at least two sides.
Group: Buildings
Used on these elements
Implies
layer=*
Useful combination
covered=* amenity=*
See also
building:part=roof
Wikidata
Q47525110
Status: in use
Tools for this tag
taginfo · CH · CZ · FR · GB · HU · IE · IN · JP · PL overpass-turbo

building=roof is used for roofs which are open at least at two sides. For roof features which are part of another building use building:part=roof.

How to map

If there are already other features below or above the roof on the map, layer should be used to provide information about stacking of features. In addition covered=* may be used to mark objects (for example roads) as covered by the roof.

In case of ways below the roof:

• either all ways below roof or the roof should get a layer tag. In more complex situations layer=* for roof, ways under roof and for other objects may be required.
• The way may have shared nodes with the building where it crosses the outline of the building.
• The way should be tagged with covered=*. When the two walls of the building=roof form a tunnel without an open side use tunnel=building_passage instead.

Some mappers prefer to map building=roof + layer=1 and not sharing any nodes with ways passing below the roof - please discuss.

Consider Simple Indoor Tagging or Simple 3D buildings for more complicated cases.

Alternatives

• building=* + wall=no is in use for buildings without (some) walls
• man_made=canopy is in use for canopy like roofs
• building=carport is proposed in Proposed features/carport buildings

Examples

This tag is for instance used for the roofs of petrol stations (amenity=fuel).

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See also

• covered=*
• 3D modelling of roofs

Usage in Sweden

This is a minor import but: This tag was recently used in an import in Sweden; It was used to denote, among other things, buildings that have two walls or less. This means can mean e.g. a front porch. So when it was surveyed the buildings had two or less walls, but it's noted that new walls can later be added by the owners and the data can not be 100% on what the current state is. 206338356 206338356