Helpful Info for Happy Renting
Condensation, Mould & Mildew
Tenants have obligations, as set out in S40 of the Residential Tenancies Act to ensure premises are kept reasonably clean and tidy. This includes keeping it in a condition that does not encourage mould and dampness.
Condensation and mildew in homes are mainly winter problems, but they can occur year-round in some situations. Mould and mildew are common household problems that can affect your health, damage belongings, and even compromise the structure of your home if left untreated.
What is Condesation, Mould and Mildew?
Mould, mildew, and condensation are common issues in damp environments, particularly in bathrooms, kitchens, and laundries. These problems are often interconnected, as condensation can create the perfect conditions for mould and mildew to thrive. Mildew is a type of fungus that appears as a powdery white or grey substance on surfaces. It requires moisture to grow, so the more persistently damp a room is, the more likely mildew will develop. Mould is another type of fungus, often black, green, or brown, that can penetrate porous materials like wood, fabric, and drywall. Unlike mildew, mould tends to grow deeper into surfaces and is more challenging to remove.
What Causes Condensation, Mould and Mildew?
The main culprit behind mould and mildew is moisture, often due to condensation. Condensation occurs when the air becomes saturated with water vapour and can no longer hold additional moisture. This typically happens when warm, humid air comes into contact with cold surfaces like windows, walls, ceilings, or tiles resulting in water droplets forming. Persistent condensation increases dampness and promotes the growth of mould and mildew. Everyday activities like cooking, showering, and drying clothes indoors can significantly increase indoor humidity levels, creating the perfect breeding ground for mould and mildew.
Why it's Important to Act Quickly
Ignoring mould and mildew can lead to worsening health problems and costly repairs. Even minor issues, like condensation on windows, can develop into bigger problems if not addressed. A proactive approach will help protect your home, health, and belongings from damage.
By understanding the causes and following the tips below, you can keep your home healthy, and mould-free all year round.
How to Prevent Mould and Mildew
Temperature and Heating
During the colder months, keep your home 5-7°C warmer than outside by using consistent heating throughout the day. Space heaters, heat pumps, or electric heaters are best, while gas and oil heaters should be avoided as they add moisture to the air.
Ventilation and Airflow
Ventilate your home by opening windows wide for a minimum of 15 minutes daily, especially after cooking or showering. Keep windows slightly open longer to maintain airflow, and use extractor fans in kitchens and bathrooms to remove steam. Leave gaps between furniture and walls for better air circulation.
Condensation Management
Wipe condensation from windows, walls, and surfaces as it appears. Use heavy curtains to trap warmth at night and open them during the day to let sunlight in. These small actions reduce moisture buildup and keep your home warmer.
Moisture Control
Avoid drying clothes indoors—hang them outside whenever possible. Vent your clothes drying machine directly outside, limit houseplants to reduce humidity, and use dehumidifiers in damp areas to remove excess moisture effectively.
Kitchen and Bathroom Habits
Keep doors closed when cooking or showering to stop steam from spreading. Use lids on pots and extractor fans to reduce moisture, and keep shower curtains inside the tub to prevent dripping. Clean curtains regularly to avoid mould growth.
Wardrobe and Storage Tips
Avoid storing damp clothes or shoes in wardrobes. Use cupboard heaters or ventilated doors to prevent mildew, and consider moisture-absorbing products like Damprid for enclosed spaces.
Removing Mould & Mildew
The removal and containment of mould and mildew is the tenants responsibility. Open windows or use an extractor fan to improve airflow while cleaning. Use gloves and a mask to avoid contact with spores. For hard surfaces, mix one part white vinegar with three parts water or use a commercial mould remover. For fabrics, wash with hot water and detergent. Wipe down surfaces with a damp cloth or sponge and rinse it often to reduce the risk of it spreading. Avoid dry scrubbing, as it can release spores into the air.