CertainTeed. Designed for attic areas, InsulSafe SP blown-in fiberglass insulation is manufactured with no formaldehyde and is Greenguard certified. The product offers up to 20% better coverage versus competitors, the company says, with one bag covering up to 67 square feet. InsulSafe SP installed in the attic at 113/4 inches is R-30 and 141/2 inches is R-38. 800.233.8990. www.certainteed.com.