Different approaches to air sealing, insulation, and moisture control are available with this manufacturer’s hybrid insulation system. CertaSpray, a medium-density polyurethane closed-cell foam, can be applied to full-wall thickness as an all-in-one insulation, air sealing, and vapor-control system, or used as a flashing barrier covered by Optima blown-in fiberglass insulation and MemBrain vapor retarder, which varies in density based on ambient temperature and humidity. System components are Energy Star qualified, NAHB Green Approved, and certified to Greenguard Indoor Air Quality and Greenguard Children & Schools standards. 800.233.8990. www.certainteedhybrid.com.