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ES+H Multifamily Building Upgrades_508c_02 09 2016

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Energy Savings Plus Health | INDOOR AIR QUALITY GUIDELINES FOR MULTIFAMILY BUILDING UPGRADES 19 PRIORITY ISSUE 1.0 MOISTURE CONTROL AND MOLD (continued) ASSESSMENT PROTOCOLS (AP) MINIMUM ACTIONS (MA) EXPANDED ACTIONS (EA) AP 1.4 Identify Moisture Problems That May Prevent Other Building Upgrades If there are significant moisture problems that cannot be addressed, do not install building upgrades that will reduce the building's air infiltration rate. Instances where this may be the case include buildings that have significant condensation or humidity problems, such as condensation on multiple windows, condensation in attics, or significant moisture or mold problems that are beyond the scope of the remedies under Minimum Actions. • Install dehumidifiers in humid climates to avoid moisture problems if individual air conditioning systems serving each dwelling unit cannot effectively control relative humidity below 60% under partial cooling load conditions. • Remove unvented combustion space heaters. MA 1.8 Use Nonporous Materials in Moisture Prone Areas Use moisture-resistant materials in areas likely to become wetted frequently. If possible, use seamless and slip-resistant materials. Note: Floor-covering manufacturers specify the maximum water vapor emission rate of concrete over which coverings such as tile and carpet can be installed. Installing a covering on concrete that exceeds the maximum emission rate may cause the covering to fail, promote mold growth, and void the manufacturer's warranty. It is recommended that the water vapor emission rate of a floor be measured before coverings are installed (even when the installation occurs long after the building was constructed). MA 1.9 Control Moisture During Roofing Modifications Take precautions to control moisture during roofing modifications. For example: • Protect open roof areas from rain during construction. • Design and construct roofing systems and flashing details to ensure proper moisture barriers. • Repair roof leaks before air sealing or insulating the attic. MA 1.10 Protect On-Site Materials From Moisture Protect materials on-site from moisture damage. Do not install materials that show visible signs of biological growth resulting from the presence of moisture. Store and install all building products, systems and components in strict accordance with the manufacturers' printed instructions. References for Priority Issue 1.0 Moisture Control and Mold: ACCA: Manual J Residential Load Calculation ACCA: Manual N Commercial Load Calculation ACCA: Manual S Residential Equipment Selection ASHRAE/ACCA Standard 183-2007 (RA 2014) ASHRAE: Load Calculation Applications Manual ASHRAE: ASHRAE Handbook – Fundamentals ASHRAE: ASHRAE Handbook – HVAC Systems and Equipment CDC-NIOSH: Dampness and Mold Assessment Tool DOE: Standard Work Specifications for Multi-Family Home Energy Upgrades EPA: Moisture Control Guidance for Building Design, Construction and Maintenance EPA: Mold Remediation in Schools and Commercial Buildings IICRC: S520 Standard and Reference Guide for Professional Mold Remediation International Code Council: International Building Code, 2012 Edition, Chapter 12 Sections 1203.2 and 1203.3

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