Methods to reduce heat gain

The use of wall cavities (as air cushions), thermal mass (thick walls), and external
reflective materials, such as whitewash or enameled ceramic tiles, can help prevent heat gains
on external walls. Thermal mass or inertia is also important to provide a stable indoor
environment, since the interior air temperature hardly changes. It helps maintain the
building’s interior cool during the day, the daily heat transfer being delayed for a couple of
hours.