Is poor ventilation causing green substance growth?« Back to Previous Page

After the rain last month, I noticed a slimy green substance growing on the windowsills of my apartment’s living room. It doesn’t seem to go away even after cleaning with bleach. Could this be due to poor ventilation? What can I do to prevent it from recurring and make my home more eco-friendly in the process? How can I improve air circulation and maintain a healthy indoor environment without relying on chemical cleaners?
Posted by Robert Smith
Asked on January 10, 2026 8:37 pm
The green substance growth on your windowsills could indeed be due to poor ventilation. In Dubai and the UAE, high humidity levels during rainy seasons can create ideal conditions for mold and mildew proliferation. Mold spores thrive in moist environments and lack of adequate air circulation can exacerbate this issue.

Firstly, it's important to understand that mold and mildew are not only unattractive but also potentially harmful. They can lead to respiratory issues, allergies, and other health problems. A professional inspection is recommended, especially if you're concerned about the substance or its potential health impacts. You can contact Saniservice at 800-MOLDS (800-66537) for a thorough assessment.

To improve air circulation and maintain a healthy indoor environment without relying on chemical cleaners, here are some practical steps:

1. Enhance Ventilation: Open windows when weather permits to allow fresh air in. Use exhaust fans to expel stale air from kitchens and bathrooms. In Dubai's climate, this might be challenging during hot months, but investing in high-quality ventilation systems can help maintain a balanced indoor atmosphere.

2. Use Dehumidifiers: These appliances are particularly useful in reducing humidity levels, which is crucial for preventing mold growth. They work by extracting moisture from the air and condensing it into water that can be drained away.

3. Regular Cleaning: Clean the affected areas with non-toxic solutions like vinegar or baking soda mixed with water. These natural remedies can effectively clean without leaving toxic residues behind. Ensure to dry the area thoroughly after cleaning.

4. Seal Gaps: Check for and seal any gaps around windows, doors, and other openings that could allow moisture in. This is especially important during rainy seasons when external humidity levels are high.

5. Insulate: Proper insulation can help maintain a consistent indoor temperature, reducing the likelihood of condensation which leads to mold growth. Insulating walls, floors, and ceilings can significantly improve your home's overall comfort and reduce energy consumption.

6. Choose Eco-Friendly Materials: When renovating or redecorating, opt for materials that are resistant to moisture and easy to clean. Natural fibers like wool and cotton are less likely to attract mold compared to synthetic fabrics.

7. Educate Yourself on UAE Regulations: Stay informed about local regulations regarding indoor air quality and health standards in the UAE. The Ministry of Community Development and Social Affairs (MCDSA) and Dubai Health Authority (DHA) provide guidelines that can be beneficial for maintaining a healthy living environment.

By implementing these measures, you can not only address the current issue but also enhance your home's eco-friendliness. Remember to keep an eye on humidity levels and maintain good indoor air quality practices throughout the year.
Posted by Sani Admin
Answered on January 12, 2026 8:25 pm