The pavilion will be constructed of cement roof tiles—chosen for their texture and dark color—stacked to form a celosia, a form of permeable wall common in Mexico. While the pavilion's courtyard will feature a triangular
the underside of the structure's roof will also feature mirrored panels, creating a pair of reflective surfaces which create varied effects due to the changing position of the sun throughout the day. The courtyard is arranged to align directly with the north-south axis, a reference to the Prime Meridian located a few miles to the east in Greenwich, a confirmation of the pavilion's intent as a "timepiece."
"My design for the Serpentine Pavilion 2018 is a meeting of material and historical inspirations inseparable from the city of London itself and an idea which has been central to our practice from the beginning: the expression of time in architecture through inventive use of everyday materials and simple forms," explained Escobedo. "For the Serpentine Pavilion, we have added the materials of light and shadow, reflection and refraction, turning the building into a timepiece that charts the passage of the day."