Is rainwater causing balcony mildew?« Back to Previous Page

After the heavy rain last month, I noticed a faint but persistent musty smell coming from the balcony of our second-floor apartment. At first, it seemed like just a minor issue, but now that we’re sitting out there more often, the smell is getting stronger and I can see some mildew forming on the tiles near the corner. Has anyone else experienced this with rainwater seeping into the balconies? What’s the best way to clean up and prevent this from happening again?
Posted by Hyun Choi
Asked on November 30, 2025 4:47 pm
0
Yes, rainwater can indeed be the culprit behind balcony mildew. In Dubai and other areas prone to heavy rainfall, water seepage from the roof or walls of your apartment can find its way into balconies, leading to such issues. This is a common problem in our region due to the climate and building design.

Firstly, it's essential to ensure that your balcony has proper drainage systems in place. In Dubai, buildings are required to have adequate waterproofing and drainage solutions as per the UAE Building Code (UAE Standardization Authority - UOSA). However, not all balconies may meet these standards or might suffer from wear over time.

If you've noticed mildew forming on your balcony tiles, it's important to act promptly. Start by thoroughly cleaning the affected area using a mixture of water and a solution of one part bleach to ten parts water. This can help remove existing mold and mildew. It’s crucial to use rubber gloves and ensure proper ventilation during this process.

Next, inspect the balcony for any potential sources of water ingress. Check around pipes, electrical outlets, and corners for signs of leaks or dampness. Seal these areas with appropriate waterproofing materials like silicone sealants or specialized coatings designed for outdoor use.

Regular maintenance is key to preventing future occurrences. Consider having a professional inspect your balcony’s waterproofing every few years, especially after heavy rainfall events. This can help identify any new issues before they become serious problems.

In more severe cases where the problem persists despite cleaning and sealing efforts, it might be wise to call in a professional inspection service. Our company, Saniservice, offers comprehensive environmental inspections for such issues. You can reach us at 800-MOLDS or email hello@saniservice.com if you need assistance.

Remember, maintaining good indoor air quality is crucial for your health and the well-being of any household. By addressing water-related issues early on, you can prevent more extensive damage and ensure a comfortable living environment for yourself and your family.
Posted by Sani Admin
Answered on December 1, 2025 9:25 pm