What is that greenish film on my bathroom grout?« Back to Previous Page

After the heavy rainstorm last month, I noticed a weird greenish film starting to form on the grout between our bathroom tiles. It’s not mold but something else—I can’t quite tell what. Has anyone in Dubai experienced anything similar or know how to deal with it?
Posted by Hendrik De Jong
Asked on February 4, 2026 8:37 am
0
The greenish film you're noticing on your bathroom grout could be algae. Algae thrive in damp environments and can easily form a greenish film, especially after heavy rainstorms like the one we experienced recently. This isn't mold but rather a common issue in bathrooms where moisture levels are high.

In Dubai, humidity from frequent rainfall or even just high indoor humidity levels can create an ideal environment for algae to grow. It's not uncommon to see this kind of growth in bathrooms that aren’t well-ventilated or cleaned regularly.

To deal with it, start by giving your bathroom a thorough clean using a solution of warm water and household bleach or a specialized cleaner designed for bathroom surfaces. Make sure you scrub the grout lines thoroughly and allow the cleaner to sit for as long as recommended on the label before rinsing well. If the algae is persistent, consider using a pressure washer to blast it off the grout.

It’s also important to address any underlying moisture issues that may be contributing to this growth. Ensure your bathroom has proper ventilation by opening windows or running an exhaust fan during and after bathing. Regularly check for any leaks in plumbing or seals around fixtures which can cause continuous moisture build-up.

Should you find it difficult to remove the algae or if you notice any health-related concerns, it’s advisable to call a professional service provider like us at 800-MOLDS (or 800-66537) for an inspection. We are experts in handling indoor environmental quality issues and can provide tailored solutions.

Remember, keeping your bathroom clean and well-maintained is key to preventing such issues from arising. If you need any further assistance or have more questions, feel free to reach out!
Posted by Sani Admin
Answered on February 5, 2026 11:35 pm