How To Get Rid Of Mould Effectively

Contents:

• Tools & materials
• How to get rid of mould depending on the severity
• How to get rid of mould from different surfaces
• How to prevent mould & dampness
• Key takeaways
• FAQs

Mould appears when moisture levels stay too high for too long in your home. Those dark patches spreading across bathroom walls and ceilings create serious health risks and damage your property's structure over time.

Learning how to get rid of mould effectively protects both your family's health and your home's value. Mould spores trigger respiratory problems, worsen asthma, and cause allergic reactions. Left untreated, mould weakens building materials and creates expensive repair bills.

The key to successful mould removal lies in understanding the root cause. Surface cleaning alone won't solve the problem permanently. You need to deal with both the visible mould and the underlying moisture that feeds it. This means knowing how to get rid of damp alongside the mould itself.

Walls need one method, fabric needs another. Knowing how to get rid of mould on walls permanently means using the right technique for each situation. The severity also matters. Light surface mould cleans away easily, but established black mould colonies need serious treatment.

This guide covers everything from basic cleaning techniques to when professional help becomes necessary. You'll learn to identify mould types, choose the right removal methods, and stop future growth. Most importantly, you'll understand when a job needs professional expertise and specialist equipment.

Cleaning supplies

• Mould remover: choose products designed for your surface type.

• Microfibre cloths: won't scratch surfaces and pick up spores effectively.

• Bucket: for mixing cleaning solutions.

• Scrubbing brush: with stiff bristles for stubborn areas.

• Disposable cloths: for final clean-up.

Safety equipment

• Facemasks: P3-rated masks filter out mould spores.

• Rubber gloves or chemical resistant gloves: to protect your skin.

• Safety goggles: for eye protection.

• Disposable overalls: mould spores stick to fabric and are hard to wash out completely.

For moisture control

• Plastic sheeting: to contain the work area.

• Fan: to improve air circulation during cleaning.

• Dehumidifier: only needed if there's an ongoing moisture problem causing the mould

Before you start cleaning, you need to understand what you're dealing with. Mould severity determines your approach and whether you can handle the job yourself.

Check these key factors:

• Size of affected area: measure the total coverage across all surfaces

• Depth of growth: surface spots or deep penetration into materials

• Location: isolated patches or spread across multiple rooms

• Type of surface: painted walls, bare plaster, fabric, or porous materials

• Smell intensity: strong musty odours indicate extensive hidden growth

Small patches under 1 square metre on hard surfaces usually qualify as superficial mould. Areas larger than 3 square metres or any mould on porous materials like fabric need more intensive treatment.

 

For superficial mould

Light surface mould on painted walls or tiles comes off with basic cleaning. This covers small patches that haven't penetrated deep into the material, including very new growth that's just starting to appear.

1. Put on appropriate PPE, i.e. disposable coveralls, mask, gloves, and goggles

2. Mix mould remover according to product instructions

3. Spray the affected area and leave for the recommended time

4. Wipe clean with a microfibre cloth

5. Rinse with clean water and dry thoroughly

6. Check the area daily for a week to confirm complete removal

For very new mould spots, you can often skip the commercial remover and use a diluted bleach solution on hard surfaces only. Never use bleach on painted walls, wood or fabric as it can cause damage.

 

For stubborn mould

Established mould colonies need stronger treatment and more time to be removed completely. This includes dark stains that resist initial cleaning or mould that keeps returning despite proper treatment. 

Recurring mould means there’s an ongoing moisture problem. If you want to know how to get rid of damp for good, track the source, such as leaks or poor ventilation, and fix it before starting any cleaning. When figuring out how to get rid of mould on walls permanently, always deal with the damp first, then treat the surface so the problem doesn’t return.

1. Increase ventilation in the room. Open your windows and use a fan

2. Apply mould remover and let it work for longer than the label instructions

3. Use a stiff brush to scrub the surface gently

4. Repeat treatment if stains remain visible

5. Apply a second coat of mould remover after initial cleaning

6. Allow extended drying time before declaring the job finished

7. If mould returns within weeks, investigate moisture sources before cleaning again

 

For extensive mould issues

Large-scale mould problems covering more than 3 square metres require professional assessment. The health risks and complexity increase significantly at this level.

Consider calling professionals when:

• Mould covers large wall sections or entire rooms

• Growth appears in HVAC systems or behind walls

• Strong odours persist after cleaning attempts

• Anyone in the house has respiratory conditions

• Mould returns repeatedly despite proper treatment

Professional mould remediation companies have specialist equipment, stronger treatments, and experience handling contaminated materials safely.

 

Removing black mould

Black mould creates serious health risks that go far beyond regular household mould. This toxic variety produces mycotoxins that can cause respiratory problems, immune system damage, and neurological issues. Even small amounts require extreme caution.

Professional removal is strongly recommended for any suspected black mould. Many experts advise against any DIY black mould removal due to health risks and identification difficulties. Visual identification isn't reliable because what appears to be black mould may be regular dark mould, or vice versa.

If you choose to attempt removal of a very small patch (smaller than 30cm square) on a hard surface, use maximum safety precautions. However, consider professional testing first to confirm what type of mould you're dealing with.

Black mould thrives in areas with persistent moisture, such as behind walls, under flooring, or in HVAC systems. If you find it in one location, assume it exists elsewhere too. Check surrounding areas thoroughly before starting any work.

The removal process requires complete containment to prevent spore spread. Seal off the work area with plastic sheeting and tape. Never use a regular vacuum or fan during black mould removal - this spreads spores throughout your home. Seal all contaminated materials, including cleaning cloths and protective equipment, in plastic bags before disposal.

If the affected area covers more than 30cm square, or if anyone in your household has respiratory conditions, call a professional mould remediation company. They have the proper equipment and training to handle toxic mould safely.

 

Safety precautions for black mould

Black mould removal demands maximum protection for your health. The toxic spores can cause immediate respiratory irritation and long-term health problems.

Essential safety equipment and precautions:

Personal protective equipment you’ll need

• P3-rated facemasks as regular dust masks won't filter out microscopic mould spores

• Full protective coveralls, rubber gloves, and safety goggles

• Disposable coveralls that you can throw away after the job

Work area safety

• Clear everyone else from the area, especially children or anyone with asthma

• Seal doors to other parts of your home during work

• Never eat, drink, or smoke while working

After completion

• Remove all protective clothing and shower immediately

• Wash work clothes separately on the hottest setting

• Double-bag all contaminated materials in heavy plastic bags and seal tightly

Warning signs

• Stop work immediately if you feel dizzy, nauseous, or have breathing difficulties

• Consider professional testing to confirm what type of mould you're dealing with

Walls

Wall mould requires different approaches depending on the wall material and paint type. Always test your cleaning method on a small, hidden area first.

For painted walls

1. Mix mould remover with water according to product instructions

2. Apply with a spray bottle and let it sit for the recommended time

3. Wipe clean with a microfibre cloth, working from top to bottom

4. Rinse with clean water and dry thoroughly. Keeping the walls dry is vital to getting rid of mould on walls permanently.

5. Check for any remaining stains and repeat if necessary

For bare plaster or porous walls

1. Use a stiff brush to remove surface mould before applying cleaner

2. Apply mould treatment and allow longer contact time

3. Scrub gently to avoid damaging the surface

4. Badly affected areas may need repainting with mould-resistant paint after treatment

 

Fabric

Fabric items with mould should be treated quickly before spores spread further. Some items may be beyond saving if heavily contaminated.

For washable fabrics

1. Take items outside to shake off loose spores

2. Pre-treat stained areas with mould remover designed for fabrics

3. Wash immediately in the hottest water the fabric can handle

4. Add oxygen bleach if the fabric allows

5. Dry completely in sunlight if possible. UV light kills remaining spores

For non-washable fabrics

1. Vacuum thoroughly with HEPA filter to remove surface spores

2. Test any cleaning solution on an inconspicuous area first

3. For light mould, try dabbing with undiluted white vinegar (5-8% acetic acid) using a clean cloth

4. For stubborn mould, carefully apply rubbing alcohol with a cotton swab to affected areas only

5. Blot (never rub) to avoid spreading the stain

6. Allow to air dry completely in a well-ventilated area

Professional consultation is recommended for valuable items, antique fabrics, large contaminated areas, or when DIY attempts don't work. Heavily contaminated items may need replacing if professional cleaning isn't successful.

 

Furniture

Wooden furniture can often be saved, but soft furnishings may need professional treatment or replacement.

For wooden furniture

1. Move the item to a well-ventilated area

2. Clean with a solution suitable for wood surfaces using a soft brush

3. Allow to dry completely before assessing if the treatment was successful

4. For persistent stains, consider professional restoration rather than DIY sanding

5. Apply wood treatment or sealant once completely dry

Avoid sanding mouldy wood yourself as this releases dangerous spores into the air. Professional remediation with proper containment is recommended for severe cases.

For upholstered furniture

Professional cleaning is usually necessary. The foam padding may retain spores even after surface cleaning.

1. Vacuum thoroughly with a HEPA filter to remove surface spores and debris

2. Test fabric-safe mould remover on a hidden area first

3. Apply mould treatment according to product instructions, working from the outside of the stain inward

4. Use a clean, damp cloth to remove residue - don't oversoak the fabric

5. Dry completely using fans and dehumidifiers - moisture trapped in padding causes regrowth

6. For valuable pieces or persistent mould, professional cleaning may be more cost-effective than replacement

When to dispose: If mould covers large areas, smells remain after treatment, or the padding feels consistently damp, replacement is often safer than continued cleaning attempts.

 

Sealant

Sealant around baths and showers is particularly prone to mould growth due to constant moisture exposure. The porous nature of aged sealant makes mould difficult to remove completely.

For light surface mould

1. Apply mould remover designed for bathroom use and let it work for the recommended time

2. Use an old toothbrush to gently scrub along the sealant lines

3. Wipe clean with a microfibre cloth and rinse thoroughly

4. Dry the area completely and check for any remaining traces

For embedded mould

1. Apply mould treatment and leave for an extended contact time

2. Use a plastic scraper or an old credit card to remove softened sealant if heavily contaminated

3. Clean the area thoroughly and allow it to dry completely

4. Apply fresh sealant designed for wet environments

When to replace: If mould has penetrated deep into the sealant or keeps returning despite treatment, removal and replacement are often more effective than repeated cleaning attempts.

Complete methods to remove mould from sealant involve specific techniques for both cleaning and reapplication.

Prevention beats clean-up every time. Once you've removed existing mould, keeping it away becomes your main focus. Knowing how to get rid of damp in common problem areas such as bathrooms and kitchens will stop mould from returning.

If you’ve already addressed the problem, the real secret to how to get rid of mould on walls permanently is ongoing moisture control combined with regular cleaning and proper ventilation.

Control moisture at the source by fixing leaks immediately and improving ventilation throughout your home. Use extractor fans in bathrooms and kitchens during and after activities that create steam. Open windows regularly to allow fresh air circulation, even in winter.

Regular cleaning stops mould before it takes hold. Wipe down surfaces prone to condensation weekly. Clean windows and frames regularly as they collect moisture that feeds mould growth.

Install proper ventilation in problem areas. Bathroom and kitchen fans should vent outside, not into the loft space. Passive vents in walls and windows help maintain air flow.

Consider mould-resistant paint in areas that stay damp. These specialist paints contain fungicides that prevent mould growth on painted surfaces. They work well in bathrooms, kitchens, and other high-moisture areas.

Finally, keep indoor humidity below 60% to prevent mould growth. Use a hygrometer to monitor levels and take action when they rise too high.

 

Effective use of dehumidifiers and fans

Dehumidifiers remove excess moisture from the air, making your home less hospitable to mould growth. They're particularly useful in basements, utility rooms, and other areas with poor natural ventilation.

Choose a dehumidifier sized for your space. Smaller units work well in single rooms, while larger models can handle whole floors or open-plan areas. Empty the collection tank regularly and clean the filter to maintain efficiency.

Position fans to create air movement in stagnant areas. Even simple desk fans help prevent moisture from building up in corners and behind furniture. Ceiling fans work well in bedrooms and living areas to keep air circulating.

Run dehumidifiers and fans together for maximum effect. The dehumidifier removes moisture while fans distribute drier air throughout the space. This combination works particularly well after flooding or major leaks.

Successful mould removal requires understanding both the visible problem and the underlying moisture source. Small surface patches can be cleaned with proper safety equipment and commercial mould removers. Larger areas of black mould need professional assessment and treatment.

Different surfaces need different approaches, as what works on painted walls may damage fabric or wood. Always test cleaning methods on hidden areas first. Safety equipment isn't optional when dealing with mould, especially the toxic varieties.

Prevention through moisture control and ventilation prevents most mould problems before they start. Fix leaks quickly, improve air circulation, and monitor humidity levels to keep your home mould-free. Keep indoor humidity below 50% for optimal prevention.

If mould keeps returning despite proper cleaning, you have an ongoing moisture problem that needs professional investigation. Understanding how to stop condensation addresses one of the most common causes of household mould growth.