How to Remove Mould from Drywall: Safe DIY Cleaning Methods

Is mould creeping across your walls and causing that musty smell in your home? You’re not alone. Mould on drywall is a common issue in many UK households, especially in moisture-prone areas like bathrooms, kitchens, and basements. It’s not just unsightly; it can trigger allergies, worsen asthma, and damage your property’s value if not treated correctly.

Homeowners often feel overwhelmed, wondering:

“Is it safe to remove mould myself?”

“Will it come back?”

“Should I replace the drywall entirely?”

This blog covers how to remove mould from drywall using safe DIY techniques, while knowing when to call in professional help. We’ll also share key prevention tips, expert advice, and the role of trusted house cleaning services in London, UK, for mould control and deep cleaning.

Why Mould Loves Drywall (And Why You Should Care)

Drywall is like a sponge,it absorbs water and holds onto moisture. When that moisture meets poor air circulation, darkness, and warm indoor temperatures, it creates a breeding ground for mould spores.

Common causes of drywall mould:

• Leaky pipes or roofs
• High indoor humidity (above 60%)
• Poorly ventilated bathrooms or kitchens
• Flooding or water damage
• Condensation on cold walls

Health Risks:

According to the NHS and WHO, household mould can:

• Causes coughing, sneezing, and nasal congestion
• Aggravate asthma and respiratory conditions.
• Affects children, the elderly, and immunocompromised individuals more severely.

DIY Mould Removal: What You Need to Know Before Starting

Assess the Mould Severity First

Not all mould problems are safe to handle DIY. Before you scrub:

• If the patch is smaller than 1 square meter, you can safely attempt removal.
• If it’s larger, reappears repeatedly, or is black mould, call professionals for remediation.
• Check for water damage or soggy drywall,if it’s soft or crumbling, the wall may need replacement.

Safety Equipment You Must Wear

Even small mould removal tasks can release harmful spores. Protect yourself with:

• Gloves (rubber or nitrile)
• N95 mask or respirator
• Safety goggles
• Old clothing, you can discard or wash immediately.

Step-by-Step: How to Remove Mould from Drywall Safely

Step 1: Ventilate the Area

Open all windows and doors. Use fans to increase airflow and prevent spores from lingering in the air or spreading to other areas.

Pro Tip: Shut the door to the rest of the house and place a towel at the base to block airflow if working in a small room like a bathroom.

Step 2: Choose Your Natural Mould Cleaner

Avoid bleach,it only works on non-porous surfaces like tiles and can release harmful fumes. Instead, use:

• White Vinegar (undiluted): Kills 82% of mould species and penetrates drywall.
• Hydrogen Peroxide (3%): A safe, powerful antifungal and antibacterial agent.
• Baking Soda Solution: 1 teaspoon baking soda + 2 cups water in a spray bottle. Ideal for prevention and light surface cleaning.

Step 3: Apply the Solution Generously

Spray your chosen solution directly onto the mouldy drywall and allow it to sit:

• Vinegar: 1 hour
• Hydrogen Peroxide: 10–15 minutes
• Baking Soda: Leave overnight (for prevention)

Letting it soak ensures it penetrates deep into the porous drywall and kills mould at the root.

Step 4: Scrub Gently Without Damaging the Drywall

Use a soft-bristle brush or non-abrasive sponge to scrub the surface gently. Avoid using metal or rough scrubbers, which can wear down the drywall and worsen the damage.

Step 5: Rinse and Dry Thoroughly

Wipe down the cleaned surface with a damp cloth to remove residues, then immediately dry it with a clean towel or a fan.

Mould hates dry air. Ensure the area is arid to avoid regrowth.

Preventing Mould Growth on Drywall Long-Term

Cleaning mould is only half the battle. Preventing it from returning is the real win. Here’s how:

Control Humidity Indoors

Keep indoor humidity between 30% and 50%. Use a dehumidifier, especially in basements or bedrooms with poor airflow.

Improve Ventilation

Install extractor fans in bathrooms and kitchens. Open windows daily, especially after hot showers or cooking.

Fix Water Leaks Immediately

Whether it’s a roof drip or a leaking pipe under the sink, any water source behind or near drywall is a mould risk.

Keep Furniture Away from Walls

Allow at least 2–3 inches of space between walls and large furniture to promote airflow and prevent condensation buildup.

When to Call Professional House Cleaners

Sometimes DIY just isn’t enough, especially when:

• Mould reappears after cleaning
• You have a persistent musty smell.
• The affected area is larger than 1 square meter.
• Family members experience ongoing respiratory symptoms.

Professional cleaners like St Anne’s Housekeeping offer expert deep cleaning, mould prevention services, and whole property cleans using non-toxic, eco-friendly products.

How St Anne’s Housekeeping Can Help

We’re not just your average cleaning service. Here’s why homeowners across London trust us:

• Hotel-trained staff with attention to detail
• Custom cleaning plans based on your home’s needs
• Regular maintenance helps to stop mould before it starts.
• Eco-friendly products are safe for children and pets.
• Prompt, polite, and professional service every time

Our comprehensive house cleaning services in London, UK, cover mould-prone areas like bathrooms, laundry rooms, and kitchens, ensuring your space stays clean, dry, and healthy.

FAQs About Mould on Drywall

Q: Is black mould dangerous?

A: Yes. Black mould (Stachybotrys chartarum) produces mycotoxins and can cause severe allergic reactions or respiratory issues.

Q: Can mould be removed entirely from drywall?

A: If caught early and the wall isn’t water-damaged, yes. Otherwise, replacement might be necessary.

Q: How often should I check for mould?

A: Inspect bathrooms, kitchens, and basements at least once a month,especially behind furniture or appliances.

Final Thoughts

Mould on drywall is a sign your home needs attention, but it doesn’t have to take over your life. By learning how to remove mould from drywall the safe way, using the right products, and addressing moisture issues early, you can protect your family’s health and your home’s value.

Book a Mould-Safe Home Clean Today

Whether it’s a small patch or part of a bigger issue, don’t wait. Let St Anne’s Housekeeping tackle it for you with professional care and proven results.