Assertion: fiberglass insulation | /r/HasProperty | man-made mineral fiber
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Source sentences:
text: Fiberglass insulation, a man-made mineral fiber con­structed from a variety of materials, such as sand and recycled glass, is the most popular form of insulation in the United States -- more than 90 percent of homes in America are lined with the pink stuff [source: Spencer and Gulick].
text: Fiberglass insulation or glass wool is a man-made vitreous fiber.
text: Fiberglass insulation is a man-made construction material used to limit thermal changes, as well as sound transmission, in buildings.