Issue link: https://hi.iaq.net/i/655416
8 Energy Savings Plus Health | INDOOR AIR QUALITY GUIDELINES FOR MULTIFAMILY BUILDING UPGRADES Examples of Multifamily Residential Building Upgrade Projects Examples of IAQ/Health Risks and Opportunities Potentially Applicable Priority Issues BUILDING ENVELOPE Roof and Ceiling Assemblies IAQ/Health Risks: 1.0 Moisture Control and Mold • Repairing or replacing • Asbestos-containing material, lead paint, PCBs or 2.0 Asbestos the roof mold may be disturbed. 3.0 Lead • Upgrading roof and ceiling insulation • Installing spray polyurethane foam (SPF) may generate indoor contaminants. 4.0 PCBs • Upgrading moisture • Moisture may be trapped behind spray foam 5.0 Radon protection insulation when installed under a low pitch 6.0 Belowground Contaminants • Upgrading air sealing wooden roof deck, creating the potential for hidden, structural roof damage and mold. • Moisture may be trapped in insulation installed adjacent to drainage planes, vapor barriers or roof membranes. • Sealing the building envelope may increase levels of indoor contaminants, including radon, combustion by-products, moisture and mold, and volatile organic compounds (VOCs). Adequate ventilation must be provided to dilute and remove indoor pollutants. Radon mitigation systems may become necessary. Opportunities: • Control for moisture by selecting moisture- resistant insulation, properly installing insulation materials, and ensuring surfaces and assemblies with condensation potential are properly sealed and insulated to avoid dew-point conditions. • Seal unwanted openings and leaks in the building envelope to reduce air infiltration and conditions conducive to pest entry. 7.0 Garage Air Pollutants 8.0 Pests 10.0 Building Products/Materials Emissions 11.0 Vented Combustion Appliances 12.0 Unvented Combustion Appliances 17.0 HVAC Equipment 18.0 Mechanical Ventilation for Individual Dwelling Units 19.0 Mechanical Ventilation for Multiple Dwelling Units Using Central Exhaust 20.0 Natural (Not Fan-Powered) Ventilation 21.0 Local Exhaust Ventilation 22.0 Building Safety for Occupants 23.0 Protecting IAQ During Construction 24.0 Jobsite Safety Wall Assemblies IAQ/Health Risks: 1.0 Moisture Control and Mold • Repairing and sealing • Asbestos-containing material, lead paint, PCBs or 2.0 Asbestos wall penetrations mold may be disturbed. 3.0 Lead • Upgrading wall insulation • Replacing windows • Adding window film covering • Repairing windows • Sealing windows • Installing spray-polyurethane foam may generate indoor contaminants. • Sealing the building envelope may increase levels of indoor contaminants, including radon, combustion by-products, moisture and mold, and VOCs. Adequate ventilation must be provided to dilute and remove indoor pollutants. Radon 4.0 PCBs 5.0 Radon 6.0 Belowground Contaminants 7.0 Garage Air Pollutants 8.0 Pests mitigation systems may become necessary. Opportunities: • Control moisture and condensation potential on surfaces, install moisture-resistant insulation, and ensure proper exterior drainage and water management (e.g., include header and panned windowsill flashing during window replacement). • Seal unwanted openings and leaks in the building envelope to reduce infiltration and conditions conducive to pest entry. 10.0 Building Products/Materials Emissions 11.0 Vented Combustion Appliances 12.0 Unvented Combustion Appliances 18.0 Mechanical Ventilation for Individual Dwelling Units 19.0 Mechanical Ventilation for Multiple Dwelling Units Using Central Exhaust 20.0 Natural (Not Fan-Powered) Ventilation 21.0 Local Exhaust Ventilation 22.0 Building Safety for Occupants 23.0 Protecting IAQ During Construction 24.0 Jobsite Safety