Mould's growth rate accelerates significantly during the winter months, making it especially important to monitor during this time.
This is due to a combination of lower temperatures, increased humidity, and higher moisture levels, creating ideal conditions for mould development. As our homes are heated more during winter, this mix of warmth and dampness further encourages mould growth.
To help prevent mould during winter, consider the following tips:
1. Maintain Indoor Humidity Below 45%
Keeping your home’s humidity level at 45% or lower is the most effective way to prevent mould. In high-humidity areas like basements, use dehumidifiers to regulate moisture levels. If humidity levels rise suddenly, check for water leaks or excess moisture, as mould can start developing within 48 hours of exposure to standing water, quickly spreading to walls and other surfaces.
2. Adjust Ceiling Fans for Winter
Ceiling fans help circulate air and reduce condensation on windows and walls, which can lead to mould. In summer, fans should rotate counterclockwise, while in winter, they should rotate clockwise to push warm air downward. This not only helps prevent mould but also keeps your home warmer for longer, reducing heating costs.
3. Use Exhaust Fans in Moisture-Prone Areas
Proper airflow is essential to prevent moisture buildup, which feeds mould spores. Since cooking and showering generate more steam in winter due to temperature differences between indoors and outdoors, always use exhaust fans. In particularly humid spaces like bedrooms, consider using a dehumidifier to further reduce moisture and prevent black mould on walls.
4. Remove Moisture from Windows
Condensation on windows can contribute to mould growth, especially on windowsills. If possible, upgrade to energy-efficient windows to reduce condensation. For wooden windows, apply high-gloss paint to protect the timber and make cleaning easier.
5. Maintain Roof Gutters
Before winter, check gutters for debris such as leaves and sticks that may cause blockages. Installing gutter guards can help prevent accumulation. Additionally, inspect your roof for missing tiles or damage from summer storms. Ensure downspouts are fully connected and unclogged so water drains away from your home's foundation, preventing basement moisture buildup and subsequent mould growth.
6. Eliminate Stagnant Water in Entryways
Water from wet shoes, rugs, and clothing can raise humidity and encourage mould growth, particularly under mats and carpets. To prevent this:
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Use raised shoe racks to promote air circulation and faster drying.
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Hang damp rugs to dry instead of leaving them on the floor.
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If your area experiences heavy rain or snow, invest in boot dryers to quickly dry footwear and warm boots in cold weather.
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Avoid storing wet coats in closets, as they can increase humidity and dampen surrounding items.
By implementing these measures, you can significantly reduce the risk of mould growth in your home, ensuring a healthier and more comfortable living environment throughout winter.
