This guide gives an overview of why condensation occurs in social housing, how it leads to mould, what Awaab’s Law requires from landlords, and covers solutions to prevent future mould & condensation issues. 

Condensation is a common part of daily life in homes, but when it’s not properly managed, it can quickly lead to more serious mould issues. For social housing providers, tackling condensation early is essential to protect both residents’ well–being and the long-term condition of housing stock.

Common Causes of Condensation in Social Housing

Moisture build-up indoors is caused by a range of routine activities, including: 

• Steam from cooking, kettles, and boiling water 
• Vapour released during baths and showers 
• Drying clothes inside without adequate airflow 
• Even breathing by occupants adds to the humidity levels

When this humid air comes into contact with cold surfaces (like windows or walls), it forms water droplets, especially noticeable in the mornings due to overnight temperature drops. 

Health Risks of Damp and Mould Exposure 

Risks to Resident Health: 

• Damp conditions create an ideal environment for mould growth, a trigger for asthma, allergies, and other respiratory problems. 
• Prolonged mould exposure may also cause skin irritation and worsen existing health issues. 
• Damp and mould can cause psychological strain, increased anxiety and reduced overall quality of life. 

Damage to Buildings: 

• Moisture can gradually weaken structural elements like timber, plaster, and ceiling materials. 
• Internal finishes (e.g. paint, wallpaper) may peel or bubble, increasing maintenance costs. 
• Black mould causes staining, unpleasant smells, and long-term surface damage. 
• Soft furnishings and carpets absorb damp, often requiring replacement sooner than expected. 

How Awaab’s Law Impacts Social Housing Providers

In response to the tragic death of two-year-old Awaab Ishak from prolonged exposure to mould in his social housing flat, the UK government introduced Awaab’s Law on 27th October, this year. This legislation requires social housing landlords to: 

• Investigate and address damp and mould issues within strict timeframes. 
• Take proactive steps to protect tenants from health risks associated with poor indoor air quality. 
• Ensure robust ventilation systems are in place to prevent avoidable harm.

Awaab’s Law reinforces the urgent responsibility housing providers must monitor, report, and resolve indoor environmental risks before they lead to serious consequences. 

Read our full article on Awaab’s law here. 

Ventilation Solutions to Reduce Condensation 

Managing condensation begins with improving how air moves through the property, especially in moisture-heavy areas like bathrooms and kitchens. 

Natural Ventilation 

Using existing features like trickle vents, air bricks, or opening windows can help, but this passive airflow is usually not enough in tightly sealed or energy-efficient homes, which are now common across social housing stock. 

Mechanical Ventilation Systems 

• Extractor Fans
  These are typically installed in kitchens and bathrooms to remove steam at its source. Advanced models with built-in humidity sensors can automatically adjust their speed, saving energy while maintaining indoor air quality.

• Positive Input Ventilation (PIV) 
  PIV units, often installed in lofts, push fresh, filtered air into the property. This slightly pressurised air flow helps drive out moist air by lowering internal humidity and preventing condensation build-up.

What Should Social Housing Providers Do Next? 

Tackling condensation early prevents more serious and costly issues down the line. By taking a proactive approach to ventilation, housing providers can ensure properties stay in good condition and tenants remain safe and healthy.

How can Mouldex help with condensation and mould?

Mouldex specialises in diagnosing and resolving condensation and mould issues in social housing properties.  

Our First Time Fix service offers a practical solution for social housing providers dealing with persistent condensation and mould issues. In a single visit, we treat the immediate problem, address the underlying causes, and provide tenants with guidance to prevent recurrence. Fully compliant with Awaab’s Law and Part F regulations, this approach reduces disruption, saves time, and helps create healthier, safer homes for residents.

Find out more about our First Time Fix Service here 

We support social housing providers across England (Southwest, Southeast, Midlands and North) and Wales with professional condensation and mould surveys. Contact us at 01278 428347 or email info@mouldexltd.com. 

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