Masco is one of the nation’s largest insulation installation contractors, according to court records, and in 2003 — a year before the suit was filed — Masco contractors installed 40 percent to 50 percent of all fiberglass insulation in new home construction nationwide.

Masco announced the settlement in a public filing with the Securities and Exchange Commission on July 26. The case, which had been scheduled for trial before Chief U.S. District Judge Julie Carnes, was canceled by court order July 23.