US: Johns Manville has launched Cavity-Shield, a formaldehyde-free fibreglass batt insulation product intended for use in the concealed spaces of multifamily buildings. The National Fire Protection Association-approved product is being marketed as an alternative solution to sprinklers in the interstitial space. The batts are designed to serve as a passive fire solution for limiting potential flame spread between and through floors. It is also intended to reduce construction costs by reducing the time and resources required for installers to complete the job.