Requires certain residential buildings to have fire barriers in common attic areas.

New Jersey's S 386 requires fire barriers with a 3-hour fire-resistance rating in common attic areas of apartment buildings with three or more stories and two or more dwelling units. This applies to both new construction (where permit applications must include the barrier requirement) and existing buildings, which must install barriers within 180 days of new safety rules being finalized. The bill aims to slow fire spread between units by preventing flames from rapidly moving through unprotected attic spaces, improving evacuation time and reducing fire damage. It amends existing fire safety laws to include this requirement for qualifying multi-unit residential buildings.