Bill > S05940

This bill aims to update New York's building and energy codes to allow the use of air-impermeable insulation in unvented attics and enclosed rafter assemblies as part of the state's efforts to reduce greenhouse gas emissions and improve building energy efficiency. The legislation recognizes that New York's buildings contribute significantly to statewide emissions and that well-insulated, sealed homes are crucial for maximizing the efficiency of heat pumps and renewable energy systems. To implement this change, the bill establishes specific requirements for using spray polyurethane foam insulation in these spaces, including: achieving a blower door test result of less than 2.5 air changes per hour, installing a positive or balanced whole-house mechanical ventilation system, ensuring proper insulation of roof rafters, and placing all heating, cooling, and ventilation equipment inside the building's thermal envelope. The new provisions will support the state's Climate Leadership and Community Protection Act by creating more energy-efficient buildings, potentially reducing consumer energy costs, and supporting the transition to all-electric building construction. The changes will take effect 180 days after the bill becomes law, with the state fire prevention and building code council responsible for developing the specific implementation standards.

Government Affairs, Housing and Urban Affairs

https://www.nysenate.gov/legislation/bills/2025/S5940