As winter bites, cold and damp conditions fuel a spike in mould complaints across the UK
The 2025 winter cold snap has triggered a significant increase in mould and damp complaints across the UK. As households deal with colder temperatures, higher indoor humidity, and reduced ventilation, moisture issues are becoming more widespread – and more severe.
According to recent data, 28% of people in the UK now report living in homes with damp, mould or cold (Health Equals, 2025).
This rise in mould cases is putting additional pressure on landlords, housing associations, and property managers, particularly as expectations for housing safety and compliance continue to increase.
Mould and damp are not simply cosmetic problems. They are recognised health hazards, linked to breathing difficulties, asthma, and worsening indoor air quality. They can also result in legal consequences if left unresolved.
Why Mould Complaints Are Rising in 2025
Several key factors are driving this winter surge:
- Cold weather leading to higher condensation levels
- Ageing UK housing stock with inadequate ventilation
- Increased tenant awareness following high-profile cases
- More leaks, insulation failures, and moisture ingress during winter
Higher occupancy rates in homes during colder months
Visible mould patches may appear minor, but the risks go far deeper. Unchecked mould can spread rapidly, damage property, and pose serious health risks to occupants.
Awaab’s Law: New Responsibilities for Social Landlords
On 27 October 2025, Awaab’s Law came into force, introducing strict legal standards for how social landlords must respond to damp and mould issues.
Under Awaab’s Law, landlords must:
- Investigate serious mould and damp hazards within strict timescales
- Resolve root causes, not just visible symptoms
- Provide clear communication to residents on actions and next steps
- Record and evidence compliance to demonstrate timely action
With mould complaints rising nationally, landlords are now under closer pressure to maintain safe, healthy living conditions for tenants – and to act quickly.
Read more about what this means for you, here.
How Marlowe Environmental Services Can Support You
We deliver industry-leading mould and damp solutions across the UK, helping social landlords, housing providers, and businesses stay safe, healthy, and compliant.
Here’s how:
- Air Quality Surveys & TVC Testing
We assess indoor air for airborne mould and bacteria, using industry-standard methods like Total Viable Count (TVC) to detect hidden hazards and validate safe living conditions. - Root Cause Investigations
Our experienced specialists trace the source of damp and mould — from leaks, flooding, or poor ventilation — and provide a clear plan of action. - Legally Aligned, Tailored Reports
Each property receives a detailed report, complete with findings, recommendations, and priority actions that align with current housing law and Awaab’s Law deadlines. - Remediation & Follow-Up Support
We don’t just identify the problem — we provide the fix. Our nationwide team carries out safe, effective treatments and advises on long-term prevention strategies. - Peace of Mind Through Compliance
With clear documentation and housing-sector expertise, we help you stay one step ahead of your legal duties while protecting your residents’ health and safety.
Stay Safe & Compliant This Winter
With mould cases rising and legislation tightening, now is the time for landlords and housing providers to take proactive action.
Don’t wait for dampness and mould to affect your tenants health or escalate further. Get in touch with us today to schedule a comprehensive survey and take proactive steps towards safeguarding your property, compliance and well-being.