Humidity in the Apartment

Why Humidity is a Problem

Kenya's tropical climate means many properties — especially in Nairobi's rainy months of April, May, and November — are susceptible to high indoor humidity. Sustained humidity above 65% encourages mould growth, which damages surfaces, ruins furniture, triggers respiratory issues, and can make a property legally uninhabitable.

Common Causes in Kenyan Properties

The most frequent causes of excess humidity are poor ventilation, cooking without extractor fans, drying clothes indoors, leaking roofs or pipes, and inadequate window sealing.

• Cooking with no ventilation or extractor hood
• Drying laundry inside, especially in smaller units
• Leaking gutters, flat roofs, or window frames
• Blocked or absent air vents in bathrooms and kitchens

Prevention Tips for Tenants

Open windows regularly to allow air circulation, especially after cooking or showering. Wipe down condensation on windows and tiles before it settles. Use bathroom ventilation fans. Report any leaks or damp patches to your landlord in writing — do not wait for the problem to worsen.

Landlord Responsibilities

Landlords are responsible for structural causes of damp — leaking roofs, failed plumbing, and inadequate ventilation. If mould appears due to structural issues, the landlord must address the root cause, not simply paint over the affected area. Persistent mould that affects health is a valid ground for rent reduction or lease termination.