About REFLECT

A global research collaboration exploring how cool roofs can support healthier, 
more climate-resilient communities.
Our Research Approach
REFLECT is made up of three connected studies that explore how cool roofs may improve health, wellbeing, and climate resilience across diverse communities.  

Together, these studies enable each participating community to generate locally relevant evidence while contributing to a broader understanding of climate adaptation.
STUDY 1
Community perspectives on cool roofs
A formative qualitative study explores community experiences of heat, climate change and cool roof technology. The findings help us understand local priorities, assess the acceptability of cool roofs and guide community engagement throughout the programme.
STUDY 2
Understanding how cool roofs work
A mechanism study is conducted in selected households at each participating community. Environmental sensors collect data over 12 months to measure how cool roofs influence indoor temperatures and other physical characteristics of homes.
STUDY 3
Cool roofs link to health and wellbeing
Community-based cluster randomised controlled trials evaluate whether cool roofs improve health, wellbeing, environmental and economic outcomes under real-world conditions. Participating households are followed for 12 months to understand how changes in the home environment influence people's health and wellbeing.
How REFLECT Generates Evidence
Tracked Outcomes

REFLECT combines environmental monitoring, health assessments and community engagement to understand how heat, housing and cool roofs influence health, wellbeing and climate resilience.

Research activities include:

  • Community interviews and engagement
  • Indoor environmental monitoring
  • Wearable and household sensors
  • Health and wellbeing assessments

These complementary approaches help build a broader understanding of how cool roofs may influence health, comfort and climate resilience across diverse communities.

A Global Research Collaboration

REFLECT is being delivered across multiple climate-vulnerable communities around the world. Each participating community contributes locally relevant evidence using harmonised research methods, helping build a broader understanding of how cool roofs perform across diverse climates, housing conditions and populations.

Do cool roofs reduce indoor air temperatures and improve health and wellbeing?

As world temperatures rise over the next several decades, reliable, cheap, mass-producible, passive interventions are needed to mitigate the negative impacts of climate change.

94,000
Mortality estimate deaths yearly due to climate-induced heat between 2030 and 2050.
$140B - $300B
The adaptation costs for developing countries by 2030.
The Health-Climate Link

Extreme heat can increase the risk of illness, particularly for:

  • older adults,
  • children,
  • and people with existing health conditions.

As temperatures continue to rise, many vulnerable communities are likely to face greater health, housing, and environmental challenges.

Why Cool Roofs Matter

Cool roofs reflect more sunlight and absorb less heat, helping reduce indoor temperatures without relying on energy-intensive cooling systems.

Potential benefits include:

  • Improved comfort and wellbeing
  • Reduced indoor heat
  • Lower energy use
  • More climate-resilient housing
Giving vulnerable communities the tools to adapt to climate change
The impacts of climate change are already being felt by vulnerable communities around the world. Exposure to extreme heat can increase the risk of various diseases, including heat stress, cardiovascular disease, diabetes, and stroke. As many LMICs already grapple with rising rates of non-communicable diseases, it is especially critical to find solutions to address heat-related impacts
on health.
Professor Sir Collin Tukuitonga
Primary Investigator
Climate change is a defining issue of our time
Extreme heat is leading to death and illness around the world. Our research can provide policy makers and donors with evidence for scaling global cool roof application to combat extreme heat exposure and save lives.
Dr Aditi Bunker
Project Lead and Co-lead Investigator