About REFLECT

A global research collaboration exploring how cool roofs can support healthier, more climate-resilient communities.
How the REFLECT Study Works
REFLECT is made up of three connected studies that explore how cool roofs may improve health, wellbeing, and climate resilience in different communities around the world.
STUDY 1
Community perspectives on cool roofs
A formative qualitative study will provide information on community perspectives on heat, climate change and cool roof technology. This study will establish the acceptability of cool roofs in the community and form the foundation of our community engagement. 
STUDY 2
Cool roof mechanism analysis
A cool roof mechanism study will be conducted in two houses at each site. We will install an array of sensors to collect data for 12 months to measure the physical impacts of cool roof materials on house characteristics. 
STUDY 3
Cool roofs link to health and wellbeing
A multi-centre, single-blind, pragmatic two-arm, parallel group cluster-randomized controlled trial will be conducted. The trial will consist of 408 houses at each study site followed up for 12 months. A range of health, economic and environmental outcomes will be measured to identify the causal relationship between cool roofs and occupant health and wellbeing. 
How REFLECT Collects Insights
Tracked Outcomes

REFLECT uses a combination of environmental monitoring, health assessments, and community engagement to better understand the relationship between heat, housing, and wellbeing.

Research activities include:

  • Indoor temperature and environmental monitoring
  • Wearable and household sensors
  • Health and wellbeing assessments
  • Interviews and community engagement

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

A Global Research Collaboration

REFLECT is being carried out across multiple climate-vulnerable regions around the world, with each location contributing unique insights into heat, housing, and wellbeing.

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