Awaab Ibrahim died in 2020 aged two, after prolonged exposure to mould in a social housing property in Rochdale. His death led directly to Awaab’s Law — Section 42 of the Social Housing (Regulation) Act 2023. The legislation requires registered social housing providers to investigate damp and mould hazards within 14 days of a written report, provide a written remediation plan within 7 days of that investigation, and complete emergency repairs within 7 days. For non-emergency cases, remediation must happen within a “reasonable timeframe.” This article sets out the practical equipment landlords need to respond effectively.
Who Does Awaab’s Law Apply To?
Currently, Awaab’s Law applies directly to registered social housing providers in England. But private landlords are not exempt from responsibility. Under the Housing Health and Safety Rating System (HHSRS), damp and mould already constitute a Category 1 hazard requiring mandatory action by any landlord — social or private. Local authorities are increasingly using HHSRS enforcement powers against private landlords who fail to address damp and mould conditions, and the penalties are significant.
Awaab’s Law is widely regarded as the direction of travel for all tenanted property in the UK. The Renters’ Reform Bill signals further expansion of landlord obligations. Acting now is both the right thing to do and commercially sensible — enforcement costs, disrepair claims and loss of rental income from void periods are all rising. Landlords who invest in the right equipment and processes today will be ahead of the curve when the rules inevitably tighten further.
Understanding the Root Cause: Condensation Damp
Most mould in UK rental properties is caused by condensation damp — not rising damp or penetrating damp. Condensation occurs when warm, humid air meets cold surfaces such as external walls, windows and unheated rooms. The moisture in the air condenses into liquid water, which creates the perfect breeding ground for mould spores.
The problem is made significantly worse by modern double glazing (which reduces natural air movement through the building fabric), tenant lifestyles (cooking without extractor fans, showering with the door open, drying clothes on radiators), and poor ventilation design. Many properties built or retrofitted in the last 30 years are effectively sealed boxes with no designed airflow path.
The single most effective long-term solution is to address the ventilation — not just treat the mould on the surface. Surface treatments and mould washes will remove visible mould temporarily, but it will return within weeks unless the underlying moisture problem is resolved.
PIV Units: The Long-Term Fix
A Positive Input Ventilation (PIV) unit is the most effective and cost-efficient long-term solution for condensation damp in residential properties. A loft-mounted PIV unit draws air from the loft space, filters it, and gently introduces it into the dwelling — typically through a ceiling-mounted diffuser on the upstairs landing. This creates a slight positive pressure inside the property, which continuously forces stale, humid air out through natural gaps around windows, doors and other openings.
The result is a constant, gentle flow of fresh, filtered, dry air circulating through the property. Most properties see condensation and mould disappear completely within 4–6 weeks of installation. PIV units run continuously at very low cost — approximately 1–2p per day in electricity — and require minimal maintenance beyond an annual filter change.
Installation requires a loft space and an electrical connection. It is a half-day job for a qualified electrician or ventilation installer. The market-leading brand is Nuaire Drimaster, which invented PIV technology over 40 years ago and remains the most widely specified unit by local authorities and housing associations. See our full guide to PIV units and damp equipment for landlords for product comparisons and pricing.
Dehumidifiers: The Fast-Response Option
When PIV installation is not immediately practical — the property has no loft, tenants are in situ and work needs to be minimally disruptive, or you need fast results to meet a compliance deadline — a commercial-grade dehumidifier removes moisture directly from the air. Dehumidifiers are sized by their extraction rate in litres per day. For a typical one- or two-bedroom flat with significant damp issues, a 30L/day unit can turn the situation around in 5–7 days.
For unattended operation in rental properties, use continuous drainage mode with a hose running to a drain or sink — this avoids the need for tenants to empty the water tank manually. Commercial units with built-in humidistats will cycle on and off automatically to maintain target humidity levels (aim for 45–55% relative humidity).
It is important to understand that dehumidifiers treat symptoms, not the root cause. They are best used as an immediate response tool alongside longer-term ventilation improvements such as PIV installation. Relying solely on a dehumidifier is not a sustainable or cost-effective strategy for ongoing compliance.
Compliance Documentation: Building Your Paper Trail
Awaab’s Law creates a clear paper trail requirement. If a complaint or enforcement action is raised, you need evidence that you investigated promptly and took reasonable remedial steps. The equipment needed for proper documentation is inexpensive:
- Digital hygrometer with data logger: Record baseline humidity readings in affected rooms before treatment begins. A data-logging model stores readings over time so you can demonstrate the improvement trajectory. Cost: under £20.
- Pin-type damp meter: Take moisture readings in affected walls, floors and window reveals. Record readings with photographs and dates. This establishes the severity of the problem and tracks progress. Cost: under £30.
- Photographic evidence: Photograph all visible mould, condensation and damp before, during and after treatment. Include date stamps.
Your documentation should record the date the complaint was received, the date of your investigation, baseline humidity and moisture readings, the date treatment equipment was installed, and follow-up readings at 2 weeks, 4 weeks and 8 weeks post-installation. This timeline demonstrates both urgency and thoroughness — exactly what a tribunal or local authority enforcement officer wants to see.
Your Action Plan
To summarise, landlords responding to Awaab’s Law and HHSRS obligations should take these steps:
- Invest in a damp meter and data-logging hygrometer — under £50 total, and essential for compliance documentation.
- Assess the root cause — condensation damp requires ventilation solutions, not just surface treatment.
- Install PIV where possible — loft-mounted units such as the Nuaire Drimaster are the most effective long-term fix at low ongoing cost.
- Deploy a commercial dehumidifier for fast response — particularly useful for meeting tight compliance deadlines or where PIV is not immediately viable.
- Document everything — baseline readings, installation dates, follow-up readings at 2, 4 and 8 weeks.
The cost of the right equipment is a fraction of the cost of a disrepair claim, enforcement fine or void period. Landlords who act proactively will protect their tenants, their properties and their bottom line.