White tiles on a terrace can help to some extent in reducing the amount of heat absorbed by the surface compared to darker-colored tiles or materials. However, it is important to note that while white tiles can reflect a portion of the Sun's heat, they do not completely stop it.
Here's how white tiles can affect heat absorption:
Reflectivity: White surfaces have higher reflectivity than darker surfaces. This means that white tiles will reflect more sunlight, including its heat component, compared to darker-colored tiles. As a result, white tiles can help in reducing the amount of heat absorbed by the terrace surface.
Thermal Conductivity: The thermal conductivity of the tiles also plays a role. Tiles, regardless of their color, conduct heat to some degree. White tiles may have a lower thermal conductivity compared to darker tiles, which can result in less heat transfer to the underlying layers of the terrace.
However, it's important to note that white tiles alone may not be sufficient to completely stop the Sun's heat. Other factors, such as insulation materials, shading, and ventilation, also play a crucial role in controlling the heat gain in a terrace or building.
To effectively reduce heat absorption and improve thermal comfort, additional measures can be taken, such as:
Insulation: Adding proper insulation layers beneath the tiles can help reduce the transfer of heat from the terrace to the interior spaces.
Shading: Providing shading elements like pergolas, awnings, or umbrellas can block direct sunlight and further reduce the heat reaching the terrace surface.
Vegetation: Incorporating greenery, such as potted plants or vertical gardens, can provide natural shading and contribute to cooling the terrace through evapotranspiration.
Ventilation: Enhancing airflow through the use of fans, natural ventilation, or mechanical ventilation systems can help dissipate heat and create a more comfortable environment.
By combining these strategies with the use of white tiles, it is possible to reduce heat absorption and create a cooler terrace space. However, the specific effectiveness will depend on various factors such as local climate conditions, insulation quality, and overall design considerations.