Assertion: asphalt | /r/ObjectUse | used for roof
Facets:
Source sentences:
text: Asphalt is also used for roofs, coatings, floor tilings, soundproofing, waterproofing, and other building-construction elements and in a number of industrial products, such as batteries.
text: Asphalt used in roofing is typically a harder grade of asphalt that is heated to much higher temperatures than those used in paving operations.