mineral wool

noun

: any of various lightweight vitreous fibrous materials used especially in heat and sound insulation

Example Sentences

Recent Examples on the Web

In most attics, that involves sealing all air leaks in the attic floor — including hard-to-reach ones behind chimneys, knee walls, and dormers — and laying down a thick layer of mineral wool or cellulose insulation. Jon Gorey, BostonGlobe.com, 12 June 2022

But that would require more layers of drywall, adding to costs, so Skender is sticking with its original plan while seeking more suppliers of mineral wool, said Andy Halik, a company vice president. Lydia O’neal, WSJ, 6 Oct. 2021

It can be effectively blown over existing insulation and is available in fiberglass, cellulose, and mineral wool. Timothy Dahl, Popular Mechanics, 13 Jan. 2019

Word History

First Known Use

1870, in the meaning defined above