Mold in Cement Prefabricated Houses

The main reasons for mold in cement prefabricated houses are the strong water absorption of materials, humid environments, decoration defects, poor ventilation, and issues with cement quality or exterior walls. Solutions include reducing humidity, cleaning and disinfecting, preventing mold regrowth, maintaining ventilation, and taking other measures.

Reducing Humidity

Cement is porous and absorbs water easily, making it prone to softening and decay in humid environments. Areas like basements with humidity levels exceeding 70% are more susceptible to mold growth, and high air humidity can exacerbate the problem. Regular ventilation is a fundamental approach; during special seasons like the rainy season, ventilation should be increased to maintain air circulation and prevent humidity buildup. Using dehumidifiers can condense moisture in the air and absorb dampness, suitable for humid environments or situations where natural ventilation is insufficient to reduce humidity. Placing items such as bamboo charcoal, activated carbon, and dehumidifying agents can reduce dampness and odors, preventing mold growth. For floors that remain damp for extended periods, laying moisture-proof mats beneath the floor can prevent ground moisture from seeping through, and promptly cleaning any accumulated water on the floor helps maintain dryness.

Cleaning and Disinfecting

If mold has already grown on walls, apply diluted bleach evenly to the moldy areas, let it sit for 30 minutes, and then rinse thoroughly with water, taking care to wear protective gear. For moldy floors, wipe and clean them with cleaning agents such as disinfectants or vinegar water, and then disinfect them with a disinfectant to effectively kill mold and bacteria, preventing further mold growth.

Preventing Mold Regrowth

After cleaning the walls, spray them with specialized mold inhibitors, which can kill mold and form a protective film on the walls to prevent mold from regrowing. Spraying mold-resistant sprays on the floor surface can effectively prevent mold growth while keeping the floor clean and hygienic.

Maintaining Ventilation

Install exhaust fans or open windows in the room to allow moisture on the floor surface to evaporate, keeping the floor dry and reducing mold growth.

Other Measures

Keep the cement prefabricated house clean by regularly cleaning the floor to prevent the accumulation of dust, garbage, and other substances, avoiding long-term exposure to bacteria and mold in the air that can lead to mold growth. If the house has water leakage issues during construction or later stages, observe regularly and repair promptly to ensure it remains intact and dry, preventing mold growth. Increase lighting appropriately, as light can reduce mold growth and shorten the time the cement surface remains damp. You can also adjust the window shading to prevent excessive sunlight.