
Sleeping in a room with mould can be harmful to your health. Spending a third of your life asleep means that, if your bedroom is mouldy, you're spending a third of your time inhaling dangerous mycotoxins. This can lead to a plethora of health problems, including upper tract infections, respiratory discomfort, coughing, wheezing, and asthma. Mould can also affect your sleep quality, contributing to sleep problems such as snoring, coughing, insomnia, and daytime sleepiness. If you see mould growing in your bedroom, it's best to cure it right away.
| Characteristics | Values |
|---|---|
| Health problems | Upper tract infections, respiratory discomfort, coughing, wheezing, asthma, sleep apnea, snoring, coughing, insomnia, daytime sleepiness, nasal congestion, throat irritation, struggle for breath, chronic fungal sinusitis, allergy symptoms, fatigue |
| Sleep disturbances | Sleep disturbances are more likely to be reported by people who notice mold odors |
| Mold growth | Mold requires moisture to grow and spread; it can grow on porous and natural materials such as cardboard, paper, wood products, ceiling tiles, wallpaper, and insulation; it can also grow inside walls, under carpets, or behind paneling |
| Prevention | Control humidity, increase ventilation, clean up spills, vacuum carpets weekly, get carpets professionally cleaned once a year, keep doors open, run ceiling fans and air conditioners, keep humidity below 50%, wash and dry clothes regularly |
| Solutions | Contact a professional mold remediation company, perform DIY removal with protective eyewear, a face mask, and gloves, using a diluted bleach and water solution |
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What You'll Learn
- Health risks: Respiratory issues, allergies, and sleep disturbances
- Prevention: Control humidity, increase ventilation, and clean spills
- Detection: Signs and symptoms of mould growth, including odour and health issues
- Treatment: Professional remediation and DIY removal methods
- Causes: Moisture, leaks, and porous materials

Health risks: Respiratory issues, allergies, and sleep disturbances
Spending a third of your life asleep means that sleeping in a mouldy room could result in you inhaling dangerous mycotoxins spores for a significant amount of time. Mycotoxins are toxic chemicals present in the spores of certain mould types. They are known to induce inflammation and irritation in the respiratory system. Consequently, this can lead to a variety of respiratory issues, including nasal congestion, throat irritation, coughing, wheezing, asthma, and a struggle for breath.
Mould can also cause or exacerbate allergies. In addition to the respiratory symptoms mentioned above, allergic reactions to mould can include instant allergy signs and symptoms, such as sneezing, a runny nose, red eyes, and skin rashes.
Mould can also negatively impact your sleep quality. A 2015 study found that people who noticed mould odours in their house also reported higher rates of sleep disturbances. Sleep problems associated with mould exposure include snoring, coughing, insomnia, and daytime sleepiness. Mould can also cause sleep apnea, a type of sleep-disordered breathing where a person stops breathing during sleep, resulting in snoring as their brain catches up with their breathing.
If you suspect mould is growing in your bedroom, it could be hidden underneath wallpaper, panelling, carpet, or behind walls. Mould thrives in dampness and humidity, and it is nearly impossible to keep mould spores from entering your home as they can come in through open airways, windows, and vents, or latch onto clothing and pets. Therefore, it is recommended to control humidity, increase ventilation, and immediately clean up any standing water or spills to prevent mould growth. If you find mould growth in your bedroom, it is recommended to contact a professional mould remediation company, especially if the growth is larger than the palm of your hand.
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Prevention: Control humidity, increase ventilation, and clean spills
Exposure to mould and mildew while sleeping can lead to adverse health effects, including allergy symptoms and sleep disturbances. To prevent these issues, it is crucial to address the root cause: mould thrives in damp environments with poor ventilation. Here are some detailed steps to minimise the potential for mould growth and maintain a healthy sleeping environment:
Control humidity:
- Identify areas of high humidity, such as bathrooms, kitchens, or spaces with poor ventilation.
- Reduce indoor humidity by opening windows or using exhaust fans to promote airflow and ventilation.
- Consider using a dehumidifier to remove moisture from the air, especially in particularly humid areas like basements or crawl spaces.
- If possible, adjust your thermostat settings to a slightly cooler temperature. Colder air holds less moisture, which can help reduce humidity levels.
Increase ventilation:
- Ensure your living space is well-ventilated by regularly opening windows or installing mechanical ventilation systems if needed.
- In areas prone to moisture, such as the kitchen or bathroom, always use exhaust fans while cooking or showering to remove excess moisture and prevent mould growth.
- Keep furniture and belongings away from walls to allow airflow behind and around them, discouraging mould growth.
Clean spills promptly:
- Act quickly when spills or leaks occur. Dry water-damaged areas and items within 24 to 48 hours to prevent mould from taking hold.
- Use absorbent materials like towels or mops to wipe up spills and remove excess moisture from surfaces.
- For hard surfaces, scrub affected areas with detergent and water, then rinse and dry thoroughly.
- If mould is already present, fix any plumbing leaks or water problems to prevent reoccurrence.
- Porous materials like ceiling tiles or carpet that have become mouldy may need to be discarded to prevent further mould growth and the potential spread of spores.
Remember, mould spores are always present in the air, but they require moisture to grow. By controlling humidity, improving ventilation, and promptly addressing spills and leaks, you can effectively prevent mould growth and create a healthier sleeping environment.
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Detection: Signs and symptoms of mould growth, including odour and health issues
Mould is a fungus that can grow both indoors and outdoors and requires dampness and moisture to flourish. It can spread rapidly, particularly in humid environments, and is often found in bedrooms, hiding in unseen areas such as underneath wallpaper, panelling, carpets, or behind walls.
Detection of mould growth can be challenging as it may be concealed, but there are signs and symptoms to look out for, including:
- Odour: A mouldy smell or musty odour in your bedroom could indicate hidden mould growth. Studies have shown that people who noticed mould odours also experienced higher rates of sleep disturbances.
- Visual clues: While mould may be hidden, visible signs of mould growth, such as discolouration or patches, on surfaces like walls, window sills, wardrobes, or porous materials like cardboard, paper, wood products, and ceiling tiles, should not be ignored.
- Health issues: Mould exposure can lead to various health problems, including allergic reactions, respiratory issues (such as coughing, wheezing, and asthma), nasal congestion, throat irritation, and even chronic illnesses like chronic fungal sinusitis. If you experience sleep disturbances, snoring, insomnia, daytime sleepiness, or frequent upper respiratory tract infections, mould could be a contributing factor.
If you suspect mould growth or experience any of the above symptoms, it is recommended to contact a professional for a thorough investigation and remediation to ensure your sleeping environment is safe and healthy.
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Treatment: Professional remediation and DIY removal methods
Exposure to mould while sleeping can lead to various health issues, including allergic reactions, sleep problems, coughing, nasal congestion, throat irritation, and respiratory issues. To address mould problems, professional remediation services or DIY removal methods can be employed.
Professional mould remediation involves a comprehensive process that addresses both the immediate issue and the underlying causes to prevent recurrence. Here's a step-by-step guide to the professional mould remediation process:
- Assessment: A trained mould removal specialist (MRS) inspects the affected area, identifies the type and extent of mould growth, and determines the necessary steps for remediation.
- Isolation and Containment: The specialists isolate the affected area to minimise the spread of mould spores. They use plastic or polyurethane sheeting to contain the mould and prevent cross-contamination.
- Moisture Control: Mould thrives in humid environments, so reducing moisture levels is crucial. Remediation specialists may use humidifiers to create an ambient mist and control the dispersion of spores during the remediation process.
- Removal of Affected Materials: Building materials impacted by mould, such as drywall, carpeting, and insulation, are carefully removed and disposed of properly. This step ensures that mould spores are not spread during the removal process.
- Cleaning and Treatment: After removing visible mould, specialists clean and treat surfaces to eliminate any remaining mould spores. This may involve using specialised mould removal products or natural cleaning solutions like undiluted white vinegar.
- Encapsulation: Following mould removal, encapsulation products are applied to seal the cleaned areas and prevent future mould growth.
- Root Cause Identification and Prevention: Remediation specialists investigate the underlying causes of mould growth, such as water leaks, humidity, or ventilation issues. They provide recommendations and solutions to prevent mould from returning, such as repairing leaks, improving ventilation, or using dehumidifiers.
While professional mould remediation is recommended for extensive or complex mould problems, there are also DIY methods that individuals can use to address smaller mould issues. Here are some general guidelines for DIY mould removal:
- Protective Gear: Always wear protective equipment when cleaning mould to avoid inhaling spores or getting them in your eyes. This includes respiratory protection, such as an N-95 respirator mask, gloves, and goggles.
- Ventilation: Ensure the area is well-ventilated during the cleaning process to prevent inhaling mould spores. Open windows or use fans to promote airflow.
- Surface Cleaning: Clean hard surfaces with mould-killing products or natural solutions like undiluted white vinegar. For external mould, a solution of bleach and water can be effective. Always follow product instructions and safety guidelines.
- Laundry and Disposal: Wash mould-exposed clothing and linens separately, using hot water and detergent. Properly dispose of any contaminated materials, such as rags or disposable gloves, in sealed garbage bags.
- Address Moisture Issues: Identify and fix the source of moisture that is contributing to mould growth. This could involve repairing leaks, improving ventilation in humid areas, or using dehumidifiers to reduce overall moisture levels in the home.
- When to Call a Professional: If the mould problem is extensive (over 10 square feet or 100 square feet, depending on the source), located in hard-to-reach areas, or caused by sewage or contaminated water, it is recommended to seek professional mould remediation services.
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Causes: Moisture, leaks, and porous materials
Mould is a fungus that grows both indoors and outdoors. It thrives in damp environments with high humidity, and once it starts growing, it rapidly spreads by releasing spores into the air.
Mould can grow on a variety of porous and natural materials, such as cardboard, paper, wood products, and ceiling tiles. It can also grow inside surfaces like wallpaper, insulation, carpets, and paneling.
Moisture is the key factor that enables mould growth and spread. Leaks in the roof, windows, or pipes can create hidden moisture sources, and if spills or leaks are not dried within 48 hours, mould can form. Additionally, water spills or leaks that are not addressed promptly can also contribute to mould growth.
To prevent mould growth, it is crucial to control humidity, increase ventilation, and promptly address any standing water or spills. Keeping humidity levels below 50% is recommended, and using a digital monitor can help maintain the desired range between 30% and 50%. Regular cleaning and vacuuming of carpets, as well as ensuring that clothing is clean and dry, can also help prevent mould.
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Frequently asked questions
Mold can cause numerous health problems and induce allergies and sleep problems. Some molds can release mycotoxins, which are toxic chemicals that can induce inflammation and irritation in the respiratory system. Common symptoms of sleeping in a moldy room include coughing, wheezing, and asthma.
Mold can significantly impact your sleep quality. It can contribute to various sleep problems, including snoring, coughing, insomnia, and daytime sleepiness. Mold can also make it harder for your body to breathe naturally while you sleep, which can interrupt your sleep.
If you see or suspect mold in your bedroom, it is recommended to contact a professional mold remediation company. For small amounts of mold, there are DIY removal methods, but it is important to wear protective eyewear, a face mask, and gloves. To prevent mold from growing in your bedroom, keep humidity low, increase ventilation, and immediately clean up any standing water or spills.











































