For decades, damp and mould have been silent invaders in British homes, hidden behind walls and under floors, undermining structural integrity and jeopardising respiratory health. The tragic death of two-year-old Awaab Ishak in 2020, directly linked to prolonged exposure to mould, exposed a national crisis where traditional inspection methods consistently failed to detect hazards before they became catastrophic.
In response, the UK government introduced Awaab’s Law in 2025, mandating social landlords to investigate and rectify damp and mould within strict timeframes. Yet, with millions of households affected and inspection costs soaring, compliance seemed a distant dream. However, a technological revolution is now underway, powered by LoRaWAN (Long Range Wide Area Network) technology.
This wireless protocol, designed for low-power, long-range connectivity, is enabling a paradigm shift from reactive damp management to proactive, data-driven prevention. By deploying inexpensive, discreet sensors that transmit real-time environmental data through stone walls and across vast rural landscapes, housing providers are finally gaining the visibility needed to protect tenants and preserve properties.
The Quick Answer
LoRaWAN technology protects homes by continuously monitoring temperature and humidity levels through wireless sensors that can predict mould growth days or weeks before it becomes visible. These battery-powered devices transmit data through thick walls to central gateways, enabling housing providers to intervene early, reduce remediation costs by up to 90%, and comply with Awaab’s Law requirements whilst protecting tenant health.
The Scale of the Crisis
Damp and mould affect 10% of UK rental properties, costing the NHS an estimated £7,000 annually per vulnerable patient due to respiratory complications. Traditional monitoring relies on visual inspections or tenant reports, methods that are inherently reactive, often detecting mould only after it has colonised walls, ceilings, or ventilation systems. By then, remediation costs average £15,000 per property, alongside significant litigation risks and reputational damage.
LoRaWAN solutions address these failures through continuous, wireless monitoring of temperature and humidity, the primary catalysts for mould growth. Sensors placed in high-risk areas such as kitchens, bathrooms, and basements transmit data to gateways via LoRaWAN’s 868MHz frequency, which penetrates thick masonry and operates over 5 to 15 kilometre ranges. This data is then analysed by platforms which use algorithms to predict mould risk days or weeks before visible signs appear.
How LoRaWAN Monitoring Works
Sensor Deployment and Data Collection
LoRaWAN sensors such as the MultiTech RBS3010 or MClimate HT Sensors measure temperature and humidity hourly, operating on batteries for up to 10 years without maintenance. Their wireless design eliminates the need for destructive wiring, making them ideal for historic or listed buildings.
Secure Data Transmission
Data is encrypted using AES-128 encryption and sent to LoRaWAN gateways like the MultiTech Conduit AP 300. A single gateway can cover an entire urban neighbourhood or rural village, as demonstrated in Huntly, Scotland, where three gateways monitored 13,000 homes. Gateways backhaul data via cellular networks (4G/5G) or Ethernet to cloud platforms.
Predictive Analytics and Intervention
Platforms like Sensative Yggio use smart algorithms to translate raw data into mould risk forecasts. For example, a humidity spike above 60% at 25°C triggers an alert, prompting landlords to initiate ventilation or dehumidification. In Sunderland’s pilot, sensors integrated with LoRaWAN window contacts identified poor ventilation habits, enabling targeted tenant education.
Benefits for Housing Providers and Tenants
The advantages of LoRaWAN monitoring extend far beyond simple detection. Early intervention reduces remediation costs by 90%, addressing a leak during initial humidity rises costs under £1,000, versus £15,000 for full-scale mould removal. LoRaWAN systems provide auditable data trails for Awaab’s Law compliance, proving investigations occurred within mandated timelines. Sunderland City Council now uses dashboards to demonstrate compliance to regulators.
Continuous monitoring reduces respiratory hospitalisations by preventing spore proliferation. In social housing, this alleviates pressure on NHS services and improves quality of life for vulnerable tenants. Additionally, sensors like the Milesight AM319 detect excessive dampness, enabling HVAC systems to adjust ventilation rates dynamically. This prevents energy waste from over-dehumidification whilst maintaining ideal humidity levels between 40% and 60%.
Real-World Success Stories
Sunderland City Council’s Social Housing Pilot
Sunderland equipped 21 properties with AICO (4G) and iOpt (LoRaWAN) sensors. Real-time data enabled pre-emptive interventions, reducing inspection costs by 60% and mould-related complaints by 45%.
The Smart Huntly Project, Scotland
Facing the challenge of monitoring granite-wall homes in a rural connectivity blackspot, the project deployed LoRaWAN sensors with 5G backhaul to transmit data across 1 square mile using three gateways. Each property required just 10 minutes for installation, with ROI achieved within 18 months via reduced NHS admissions and maintenance visits.
NHS Estate Optimisation
Hospitals use LoRaWAN sensors to monitor wards and clinics, preventing mould in high-humidity areas and protecting immunocompromised patients.
Implementation Guide for Housing Providers
Sensor Selection and Placement
Priority zones include kitchens, bathrooms, basements, and external walls. Recommended sensors include MClimate HT Sensors for humidity and temperature monitoring, MultiTech Water Rope Sensors for leak detection, and Sensative Strips MS for mould risk analytics.
Network Design
Urban areas require one gateway per 0.5 to 1 square kilometre, whilst rural zones need one per 5 to 10 square kilometres. Gateways should include battery backups to ensure operation during power outages.
Data Integration and Response
Integrate data with property management systems such as MClimate Enterprise for automated alerts. Establish workflows where alerts trigger tenant notifications, maintenance dispatches, or HVAC adjustments.
Cost Considerations
Sensors cost approximately £100 per unit. Total deployment for pilot projects averages £5,000 to £10,000 for 100 to 500 properties, with payback typically achieved within two years via saved remediation costs.
