What is this greenish film growing on our railings?« Back to Previous Page

After the recent heavy rains last month, I noticed a strange greenish film starting to grow on our balcony railings, which face the coast. It’s concerning because my kids play there often after school. The film feels slimy to touch and has a damp, musty smell that lingers even when we clean it off. Have any of you dealt with this before or know what it could be and how to remove it safely?
Posted by Khaled Ahmed
Asked on December 26, 2025 6:13 am
0
The greenish film you're noticing on your balcony railings could be caused by several factors. Given the coastal location and recent heavy rains, a likely culprit is a type of marine algae commonly found near water sources. In Dubai and the UAE, such algae can thrive in damp environments, particularly after rainfall, as it needs moisture to grow.

Marine algae often have a slimy texture and emit that musty smell you mentioned. They are not only unsightly but can also pose health risks if they grow unchecked, especially for kids who might come into contact with them frequently. The growth of this algae is common post-rain or during the monsoon season when humidity levels increase.

To address this issue safely and effectively:

1. Regular Cleaning: Use a solution of mild detergent and water to clean the railings. Ensure you rinse thoroughly afterward to remove any residue that might be left behind. Avoid using harsh chemicals, as they can damage the metal or other materials your railings are made from.

2. Drying Off: After cleaning, make sure to dry the railings well. Moisture is a key factor in algae growth, so keeping them as dry as possible will help prevent further proliferation.

3. Sealing Surfaces: Consider applying a sealant or coating that can provide an additional barrier against moisture and reduce future algae growth. This step might require professional assistance to ensure the product used is suitable for your specific materials.

4. Professional Inspection: If you're concerned about the safety of these materials, especially if they are metal, it would be wise to have a professional inspection. In Dubai, companies like Saniservice (you can contact them at 800-MOLDS or email hello@saniservice.com) specialize in environmental inspections and remediation and could provide advice on safe removal techniques.

5. Regular Monitoring: Keep an eye out for any signs of new growth. Early detection can help prevent a more extensive problem down the line.

Remember, while marine algae are common in coastal areas, their presence should not be overlooked as it can indicate underlying moisture issues that need to be addressed. Ensuring your balcony is well-ventilated and dry is key in preventing further growth and maintaining your home’s structural integrity.
Posted by Sani Admin
Answered on December 30, 2025 3:18 am