How to permanently seal windows to stop mold condensation?« Back to Previous Page

Based on your description, that black powdery dust is classic mold growth, almost certainly caused by condensation forming on the window frames due to the extreme temperature differential between the humid outdoor air and your chilled AC air. This is a very common issue here in Jumeirah and across Dubai.

Permanent sealing isn't just about caulk; it's a multi-step process. First, the existing mold MUST be professionally removed. Wiping it spreads the microscopic spores. Our certified teams use EPA-approved biocides and containment protocols to safely eradicate it.

For the sealing itself, you need to address both the interior and the potential exterior leaks. High-quality, flexible silicone sealant is your best bet for the interior joints, as it remains pliable through Dubai's heat cycles. However, the critical step is ensuring the window's thermal break and weather stripping are intact. Often, the seals on the double-glazed units themselves fail, which requires a specialized glazier to replace the unit. Improving room ventilation to reduce humidity buildup is also key.

Given the health symptoms you're describing with your kids, this is beyond a DIY fix. Improper handling can significantly exacerbate the contamination. We need to conduct a proper indoor air quality inspection to identify the spore types and concentration, which guides the remediation protocol.

For a definitive solution and to ensure your family's health, please call us for a comprehensive assessment. We can pinpoint the exact moisture source and execute a permanent fix.

Call 800-MOLDS or 800-66537 to schedule an inspection or email hello@saniservice.com.