In the rental sector, there are always grey areas that cause confusion – and sometimes friction – between tenants and landlords. One of the most common disputes we come across in York homes is this: who’s responsible for mould in a rental property?
Mould isn’t just a damp patch or a smell – it can seriously affect the condition of a rental property, trigger health issues, and lead to damage that lowers the value of the home. Sorting it quickly keeps the property safe, habitable, and legally compliant.
There’s no single answer to who’s at fault – but in this blog, we’ll explain:
- What causes mould in rented homes
- Who’s legally responsible (tenant or landlord)
- The best way to treat and prevent mould
- Why SDM Interiors in York is your go-to mould removal expert
If you’re unsure about your rights or obligations, we always recommend seeking legal advice – and getting a professional mould assessment.
Introduction to Mould Treatment in Rented Homes
Mould treatment in rented properties isn’t just about making things look tidy; it’s about safeguarding health, protecting structural integrity, and meeting legal obligations. If you’re renting in York, mould can appear quickly during damp winters or when ventilation’s poor. But treating it properly goes far beyond just spraying a bottle of cleaner on the wall.
For both landlords and tenants, it’s vital to understand that mould is often a symptom, not the root problem. Surface treatments might mask the issue temporarily, but without resolving the underlying cause, such as damp, poor airflow, or water ingress, it will keep returning.
At SDM Interiors, we help local York clients pinpoint the cause and provide both short-term fixes and long-term prevention strategies. Whether you’re a landlord dealing with tenant complaints or a tenant unsure of your rights, addressing mould quickly and correctly is always the best move.
Importance of Addressing Mould Issues
Let’s be blunt, mould isn’t something to ignore. Beyond the unpleasant smell and unsightly black spots, it can cause serious health issues and create long-term property damage. Prolonged exposure to mould spores, particularly black mould, has been linked to:
- Asthma flare-ups
- Respiratory irritation
- Skin problems
- Weakened immune systems in children and older adults
For property owners, ignoring mould can lead to:
- Deteriorating walls and plaster
- Stained paintwork
- Rotten window frames and floorboards
- Potential legal disputes under the Homes (Fitness for Human Habitation) Act 2018
If a landlord fails to take action after mould is reported, local authorities in York can serve enforcement notices or even fines. That’s why we always advise taking action early. We also offer detailed mould inspection reports that landlords or tenants can use to formally document the problem.
Understanding the Causes of Mould Growth
Mould doesn’t appear out of nowhere; it thrives in the right conditions, and unfortunately, rental properties are often the perfect breeding ground.
Common Factors Contributing to Mould:
- Condensation from activities like cooking, drying clothes indoors, or long showers with windows closed
- Lack of adequate ventilation, especially in bathrooms and kitchens
- Poor insulation causes cold patches where water vapour condenses
- Leaks in roofs, windows, or plumbing
- Rising damp, which pushes moisture up from ground level
The Role of Humidity and Temperature
Damp air trapped in sealed rooms is a key culprit. Without air flow, moisture clings to surfaces, particularly cold external walls. In York’s older terraced homes or poorly insulated flats, mould frequently builds up in corners, behind furniture, or on ceilings.
Many tenants don’t even know they’re contributing to mould buildup until it’s too late, while some landlords aren’t aware of hidden leaks or insulation gaps. That’s where a professional mould assessment becomes crucial.
Effective Mould Removal Techniques
You’ve spotted black spots around the windows or on the bathroom ceiling. Time to act, but how?
DIY Mould Removal Methods
For small patches of surface mould caused by daily living:
- Use anti-mould sprays or diluted white vinegar on hard surfaces
- Wear gloves and a mask to avoid breathing in spores
- Open windows and dry the area thoroughly
- Monitor the area regularly for regrowth
However, this is only a temporary fix if the underlying cause is damp or poor ventilation. DIY methods are not recommended for large infestations or mould caused by water damage.
When to Seek Professional Help
When mould keeps coming back, or covers more than a square metre, it’s time to call professionals like us.
At SDM Interiors, we offer:
- Full damp and mould surveys in York homes
- Moisture level checks and thermal imaging (where needed)
- Expert repairs for the root cause, whether it’s rising damp, broken seals, or gutter leaks
- Safe, long-lasting anti-mould treatments
We also help landlords by supplying written reports and before-and-after documentation that support legal compliance and tenant agreements.
How To Choose the Right Mould-Resistant Paint
Once mould is removed and repairs are complete, a crucial step is painting with protective products to avoid repeat issues.
Key Features of Mould-Resistant Paint:
- Built-in fungicidal additives that kill spores
- Durable surface for areas prone to condensation
- Breathable finishes that let walls “exhale” moisture
These paints are specially formulated to block regrowth and are ideal for bathrooms, kitchens, laundry rooms, or any north-facing room.
Top Brands and Products to Consider:
- Zinsser Perma-White – ideal for bathrooms
- Ronseal Anti-Mould Paint – great for ceilings
- Dulux Easycare MouldTec – designed for high-moisture areas
Not sure which to choose? Ask our York-based painting specialists who regularly apply these coatings in tenant-ready properties.
How To Prepare Surfaces for Painting After Mould
Surface preparation is a step that many skip, and it’s why mould returns. You can’t just paint over a problem and expect it to vanish. Here are the steps that you should follow to remove the mould fr good:
Cleaning and Treating Affected Areas
- Strip away any peeling paint, wallpaper or bubbling plaster
- Apply an anti-fungal wash to neutralise any remaining spores
- Let the area dry thoroughly over 24–48 hours
Surface Preparation Techniques
- Fill cracks and sand uneven areas
- If plaster is badly damaged, we may recommend plastering repairs to restore a smooth, dry surface
- Prime with a stain-blocking sealant before applying final paint coats
SDM Interiors handles every stage of this process, so you get results that look fresh and stay protected for years.
Applying Mould-Resistant Paint: Best Practices
Once the source of the mould is treated and surfaces are properly cleaned, applying the right paint – and applying it properly – is key to preventing future problems. At SDM Interiors, we’ve helped countless York landlords and homeowners protect their properties using professional-grade mould-resistant paints. But the magic isn’t just in the product—it’s in the process.
Here’s how our York-based team gets the job done the right way:
Step-by-Step Process:
- Thorough Surface Preparation: We never skip this step. Our team ensures all loose paint, mould residue, flaking plaster, or wallpaper is removed. If needed, we carry out plaster repairs to restore damaged areas before painting begins.
- Apply a High-Quality Primer Coat: We use a specialist stain-blocking primer that seals in any discolouration left behind by previous mould growth. This creates a solid base and helps the topcoat adhere better for a longer-lasting finish.
- Apply Two Coats of Mould-Resistant Paint: Using either a high-density roller or quality synthetic brush, we apply two full coats of anti-mould paint. This allows the active ingredients in the paint to form a protective barrier against future mould growth.
- Allow Full Drying Time Between Coats: Rushing between coats can trap moisture and reduce the effectiveness of the product. We allow for full drying, sometimes up to 24 hours, depending on humidity levels, before applying the second coat.
- Maintain Airflow During and After Application: We always recommend good ventilation during and after the job. Keeping windows slightly ajar or using extractor fans helps the paint cure properly and eliminates leftover moisture.
Whether you’re updating a single wall or refreshing an entire property, our interior painting and decorating experts in York are here to help you do it once and do it right.
How To Prevent Future Mould Growth
The work doesn’t stop once the wall is painted. Ongoing care is essential to keep mould away for good.
Regular Maintenance and Inspection
Landlords should carry out seasonal inspections. Ongoing upkeep is critical, particularly for landlords managing multiple properties. Routine inspections, especially ahead of winter, can save thousands in future repairs.
Landlords should look out for:
- Leaking roofs, radiators, or pipework – even minor drips can trigger mould within days
- Damp patches in corners or along skirting boards – often a sign of rising damp or external water ingress
- Faulty or blocked extractor fans – bathrooms and kitchens must be properly ventilated
- Blocked gutters and downpipes – can lead to water running down external walls and seeping in
Our property maintenance team in York can carry out these checks as part of a scheduled plan, ensuring nothing gets missed and that your legal obligations as a landlord are covered.
Check out our Google Business listing or see our York location here on Google Maps to learn more about our mould removal services.
Environmental Control Strategies
Tenants can also help by managing how moisture builds up during everyday life. These small changes make a huge difference and keep properties healthier for everyone.
- Open windows for 10–15 minutes daily
- Use lids when cooking to redTenants can also help by managing how moisture that builds up during everyday life. These small changes make a huge difference and keep properties healthier for everyone.
- Helpful habits include:
- Opening windows for 10–15 minutes daily, even in colder weather—this allows trapped moisture to escape
- Using lids on pans when cooking, and switching on extractor fans during and after use
- Avoid drying clothes on radiators, especially without ventilation
- Keeping furniture slightly away from external walls—this allows air to circulate and avoids cold spots where condensation collects
- Not blocking vents or airbricks—these are there for a reason and should always be left openuce steam
- Never block air vents
- Keep furniture 2–3 inches away from external walls
For vulnerable properties, landlords may need to install trickle vents, PIV systems, or upgrade insulation.
Conclusion: Who’s Responsible, Really?
Although this is rarely a black-and-white issue, here’s the general breakdown:
- Tenants are expected to manage everyday condensation responsibly by ventilating and reporting mould early.
- Landlords are liable for mould that results from the building’s condition, things like structural damp, poor insulation, or inadequate ventilation.
The best outcomes come from both sides working together. Fast action prevents legal trouble, keeps tenants safe, and protects your property’s long-term value.
