In several African communities, a simple coat of reflective roof paint is making a measurable difference by cooling homes during scorching heatwaves, offering relief to vulnerable families and improving their quality of life.
- Painted roofs reduce indoor temperatures by 3-4°C during peak heat.
- Improved cooling leads to better sleep and health outcomes.
- Locally produced paint is affordable and scalable across regions.
What happened
Researchers Lara Dugas and Mark New, supported by the Wellcome Trust’s HeatNexus initiative, set out to evaluate heat adaptation methods in African low-income communities but found none in place. Responding to this gap, they initiated a pilot project applying a locally made reflective roof paint called Rhinoluxe Heat Reflect in multiple sites across South Africa and Ghana. Over three summers, they monitored 240 houses, comparing painted roofs with unpainted ones to assess the cooling effects.
The results were clear: roofs painted with the infrared reflective coating kept indoor temperatures 3 to 4 degrees Celsius cooler during the hottest times of day. These findings directly translated into tangible benefits for residents. A single mother in Khayelitsha, a South African township, reported that cooler homes allowed her children to sleep better at night, a critical improvement during intense heatwaves.
Why it feels good
The cooling effect of reflective roof paint not only reduces indoor temperatures but also positively impacts residents' health and wellbeing. Poor sleep caused by heat is linked to worsened physical and mental health conditions, such as hypertension and diabetes. By helping families sleep soundly, the paint addresses an urgent need in communities disproportionately affected by rising temperatures due to climate change.
Beyond comfort, the project provides robust scientific data using sleep monitors, body temperature sensors, and health metrics to quantify improvements. This approach confirms that the cooling intervention is more than cosmetic – it directly benefits people's ability to rest, think clearly, and maintain their health amid climate challenges. Such measurable impact brings a hopeful shift in how low-income communities can adapt sustainably.
What to enjoy or watch next
With positive results in South Africa and Ghana, there is exciting potential for expanding the use of reflective roof paint to other heat-affected regions across Africa. The approach is affordable and uses locally manufactured materials, making it scalable for widespread adoption. Monitoring ongoing projects funded by HeatNexus will provide further insight into long-term health and environmental benefits as climate risks grow.
Watching how this initiative evolves can inspire additional innovations in heat adaptation that are accessible to vulnerable populations worldwide. Simple solutions like roof painting illustrate how targeted action can create immediate, life-changing impacts. Communities, policymakers, and climate scientists alike will benefit from following these developments as they offer a hopeful path for coping with a warming world.