She also reported potential cooling-energy savings of 20–30%, although actual results depend on climate, building design, installation quality, and cooling equipment.
Importantly, she cautioned that ordinary white paint is not necessarily equivalent to a tested cool-roof coating. Effective systems must maintain solar reflectivity while resisting moisture, dirt, weathering, and surface deterioration.
- Combining Cooling Technology with Renewable Energy
Cooler buildings can also complement other sustainability investments, particularly rooftop solar panels. During the Earth Talks discussion, participants asked whether reflective roofing could improve solar electricity generation.
Jain explained that solar panels generally perform better when excessive heat is reduced. Reflective rooftops may also provide additional light to bifacial panels, which generate electricity from both sides.
Discussing the importance of appropriate operating temperatures, she observed, “Solar panel works better if the optimum temperature is there.”
Her presentation described project results suggesting increased solar output when reflective roofing and photovoltaic systems were combined. These were project-specific findings rather than guaranteed performance improvements.
The discussion also explored rooftop vegetation, traditional building techniques, and the importance of waterproofing. Jain emphasized that different cooling strategies can work together, provided the building’s needs and intended outcomes are carefully evaluated.
The larger opportunity is to approach buildings as connected systems, combining reflective surfaces, ventilation, insulation, waterproofing, and renewable energy where appropriate.
Jain described installations at schools, industrial facilities, and commercial buildings, including a project involving approximately 25 schools in Warangal, India, that helped inform subsequent cool-roof policy development.
For Rotary clubs and nonprofit organizations, similar projects could begin with a school, community center, or neighborhood building. A carefully monitored pilot can help demonstrate results, build partnerships, and support broader adoption.
Reflective roofs are not a substitute for reducing greenhouse gas emissions or expanding urban green spaces. They are one practical tool within a larger climate-resilience strategy.
The most important shift may be conceptual: instead of relying only on mechanical cooling after buildings become hot, communities can design buildings to absorb less heat from the beginning.
A cooler roof can mean a more comfortable classroom, a safer workplace, a lower electricity bill, and a neighborhood better prepared for extreme temperatures.
Practical Takeaways & Implications
Jain’s presentation offers practical lessons for homeowners, schools, businesses, city planners, and community organizations.
- Start with the roof. Evaluate how much sunlight the building absorbs and whether a certified reflective coating could reduce heat gain.
- Choose tested materials. Compare solar reflectance, thermal performance, durability, and maintenance requirements rather than relying on color alone.
- Consider the entire building. Combine suitable roofing with ventilation, insulation, shade, and waterproofing for more reliable results.
- Prioritize vulnerable communities. Schools, affordable housing, and buildings occupied by people without air conditioning can be important candidates for heat-reduction projects.
- Measure the benefits. Track indoor temperatures, electricity consumption, occupant comfort, and maintenance costs before and after improvements.