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How To Clean Mould Off A Ceiling

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Mould mustn’t be ignored and should be dealt with quickly

Ceiling mould is unhealthy, ugly and can be difficult to clean (especially if you have a textured ceiling). Left untreated, it can permanently damage your ceiling through leaving discoloration and making the structure sag through gradually weakening the plaster. Health-wise, mould is a big no no and is dangerous due to the spores it releases into the air being harmful to anyone with respiratory challenges and allergies. Following these few easy steps can help ensure a healthy environment and a clean, mould-free ceiling.

TL;DR: Clean mould of ceiling using 1 of 3 methods: 1. Vinegar – pour distilled white vinegar into spray bottle, spray on mould, leave for 1 hour, wipe off & let it area dry. 2. Bicarb of Soda – combine 1 tsp of bicarb with water in bottle, shake & spray on mould, leave for a few mins, scrub with brush or sponge. Spray again & let it dry. 3. Hydrogen Peroxide – pour concentrate into bottle, spray on mould, leave for 10 mins, wipe with water & let it dry.

How to identify and eliminate the source of the mould

Before you clean the mould, it makes sense to firstly identify and eliminate the source, otherwise you will be fighting a never-ending battle. There are a few ways to do this, including:

  • Check for a roof leak: Water from a leaking roof is the most likely cause of most ceiling mould. Without repairing the leak, the mould will return as it thrives in a damp environment.

  • Circulation and ventilation: Mould often develops in kitchens and bathrooms which lack proper ventilation. Add extractors to release the moisture and fans to circulate the air.

  • Increase natural light: Mould grows best in dark spaces. Keep windows and curtains open to let the sunshine in. This prevents mould colonies from growing on the ceiling.

  • Improve your insulation: Poor insulation encourages mould growth. When cold air from the outside meets warm air from the inside it causes condensation. Improving insulation in your home creates a barrier, reducing mould growth conditions.

  • Check your ceiling for mould growth: You may have mould on the inside of your ceiling. Therefore, removing the underside mould will not eradicate the mould problem.

  • Put dehumidifiers in your kitchen and bathroom: Mould grows in damp, warm conditions. Removing the humidity from the air reduces a colony’s ability to thrive.

  • Keep the door open and fan on after showering: Allow the humidity in your bathroom to escape. Leave the bathroom door open and the extractor fan on for 15 minutes.

  • Hang your towels in a different room: Wet towels add humidity to the bathroom. Drying your towel in another room tempers the mould growth conditions by lowering the humidity levels.

How to naturally clean mould off a ceiling

With all the provided techniques, we would recommend using non-allergenic disposable gloves and a N95 face mask to protect your skin and breathing against any potential irritations.

Method 1: Using White Vinegar

Vinegar is a staple in most homes and is a cost-effective solution to fight mould. This natural liquid is useful for many things, including removing stains and killing germs. This mild acid kills 82% of mould types and even helps to prevent re-growth.

  1. Put on your masks and disposable gloves

  2. Pour distilled white vinegar into a spray bottle

  3. Spray it directly onto the mould and leave for an hour. This gives the vinegar plenty of time to soak into the infected area and kill the mould

  4. Wipe the vinegar off with water and a clean cloth and let the area dry. The vinegar smell should clear after a few hours. If it doesn’t, place a bowl of lemon water in the area to help neutralise the smell

Method 2: Baking Soda (Bicarbonate of Soda)

If you are a fan of chemical-free cleaning, another household staple that works wonders removing ceiling mould from your bathroom or kitchen ceiling is baking soda (bicarbonate of soda). Additionally, this mild powder absorbs moisture, acting as a preventative in keeping mould away. Another added bonus is it is also safe to use around children and animals vs. other high street cleaning brands.

  1. Combine a teaspoon of bicarbonate of soda with water in a spray bottle and shake until it has dissolved

  2. Spray it directly onto the mould and leave for a few minutes

  3. Use a scrubbing brush or sponge to remove the mould, then wipe the solution off with water

  4. Spray the solution on the area again and let it dry

Hydrogen Peroxide

Hydrogen peroxide may be one of the most effective mould-killing solutions. It is anti-viral, anti-fungal and anti-bacterial. Due to these credentials, cleaning mould from your ceiling, walls and floors using hydrogen peroxide often provides excellent results that are long lasting if other grow conditions are limited. Just keep in mind that hydrogen peroxide acts like bleach and affects delicate surfaces. Therefore, we would always recommend doing a small patch test to begin with to make sure surfaces are not damaged.

  1. Pour concentrated hydrogen peroxide into a spray bottle

  2. Spray it directly onto the mould and leave it for ten minutes

  3. Use a scrubbing brush to remove the mould and stains

  4. Wipe the surface with water and let it dry

Which Mould-Busting Method is the Best?

All of these options are good non-toxic and effective mould cleaning solutions. They are safe to use and environmentally friendly. All featured products are also inexpensive and easy to come by, available in your local supermarket. If you are renting, make sure you contact your agent before you start cleaning.

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