GET THE FACTS ~ Healing Homes Guru

Many building products can provide nutrients that allow for mold growth. In drywall, cellulose and starch found in paper facings and the core of drywall panels can serve as food for mold.[12] Drywall can be made more mold resistant by removing the food sources for mold (for example swapping paper facing for fiberglass facing) or by adding biocides to the core and paper facing.[13] Paper-faced mold and moisture resistant drywall panels, (the latest iteration of previous moisture resistant panels, sometimes called greenboard), are often used in interior applications where there is periodic elevated humidity, such as bathrooms or laundry rooms. They are not intended for use where there is direct exposure to water or in areas with continuous high humidity. Mold resistant drywall with a fiberglass matt facing can be used for additional applications, such as behind tile in wet areas (tub and shower) where allowed by code, and when drywall is installed before the building is fully enclosed.[14] Both paper-faced and fiberglass-faced mold resistant products commonly contain additives to help repel moisture as well as antimicrobial additives.[15] The specific antimicrobial additives used are not typically disclosed, but antimicrobials that have been identified for use in drywall can be carcinogens and mutagens and most are considered toxic to aquatic life. Keep in mind that mold resistant drywall is not “mold-proof.”[16] Use best practices for material handling during construction and implement proper moisture control and ventilation in buildings as primary mold prevention strategies. For applications where mold resistant drywall is needed, ask manufacturers to fully disclose product content, including antimicrobials, and associated hazards through Health Product Declarations. Because of the potentially hazardous antimicrobials, and the fact the mold resistant drywall costs more than standard drywall,[17] avoid using mold resistant drywall when it is not necessary.