How do molds get in the indoor environment and how do they grow?
Mold spores occur in the indoor and outdoor environments. Mold spores may enter your house from the outside through open doorways, windows, and heating, ventilation, and air conditioning systems with outdoor intakes. Spores in the air outside also attach themselves to people and animals, making clothing, shoes, bags, and pets’ convenient vehicles for carrying mold indoors. When mold spores drop on places where there is excessive moisture, such as where leakage may have occurred in roofs, pipes, walls, plant pots, or where there has been flooding, they will grow. Many building materials provide suitable nutrients that encourage mold to grow. Wet cellulose materials, including paper a paper products, cardboard, ceiling tiles, wood, and wood products are particularly conducive for the growth of some molds. Other materials such as dust, paints, wallpaper, insulation materials, drywall, carpet, fabric, and upholstery, commonly support mold growth.
Molds naturally grow in the indoor environment. Mold spores may also enter your house through open doorways, windows, heating, ventilation, and air conditioning systems. Spores in the air outside also attach themselves to people and animals, making clothing, shoes, bags, and pets convenient vehicles for carrying mold indoors. When mold spores drop on places where there is excessive moisture, such as where leakage may have occurred in roofs, pipes, walls, plant pots, or where there has been flooding, they will grow. Many building materials provide suitable nutrients that encourage mold to grow. Wet cellulose materials, including paper and paper products, cardboard, ceiling tiles, wood, and wood products, are particularly conducive for the growth of some molds. Other materials such as dust, paints, wallpaper, insulation materials, drywall, carpet, fabric, and upholstery, commonly support mold growth.
Hide Molds naturally grow in the outdoor environment. Mold spores may enter a house through open doorways, windows, heating, ventilation, and air conditioning systems. Spores in the air outside also attach themselves to people and animals, making clothing, shoes, bags, and pets convenient vehicles for carrying mold indoors (13). Mold needs oxygen, water, nutrients, and a temperature between 32 degrees and 100 degrees Fahrenheit to grow (12, 18). When mold spores come in contact with a food source where there is excessive moisture, such as where leakage may have occurred in roofs, pipes, walls, in plant pots, or where there has been flooding or heavy condensation, mold may grow. Additionally, a relative humidity of at least an average of 80% for a month’s duration will provide sufficient moisture for substantial mold growth (7). Many organic materials (e.g., wet cellulose materials, including paper and paper products, cardboard, ceiling tiles, wood, and wood products) provide suitable n
