Cool Roofs: How White Paint Can Cut Your Indoor Heat

A reflective white roof can cut indoor temperature by roughly 2-4C and AC use by up to 20%.

Telangana's 2023 Cool Roof Policy is India's first and mandates cool roofs on large and government buildings.

Look for a high Solar Reflectance Index (SRI); plain white lime wash is cheapest, acrylic coatings last longer.

It is a low-cost retrofit: budget roughly 15-60 per sq ft depending on material, recoat every few years.

Cool roofs fight the urban heat island, not just your power bill, but need a clean, water-tight base to work.