In Jorn Utzon's works, the treatment of material in construction and his distinctive daylight-oriented design aim to generate space and form centered around understanding the sun, sky, and local daylight characteristics. This research has identified the importance of clarifying the relations of two realization methods to be essential in order to understand his cross-cultural explorations in architecture. The interest of this research is the materialization methods of Jorn Utzon's expressive design approach, which include 'tectonic expression' and 'daylighting' in Bagsvaerd Church and Kuwait National Assembly, among his institutional designs. Tectonic expression examines the fabrication methods and assembly of concrete building elements with combinational characteristics. The daylighting aspect studies the changes of received sunlight on surfaces in the built environment through computational simulation on selected days and times. Finally, the correlated results look for correspondence of daylighting's dynamic rhythm to tectonic expressions' static rhythm during the specified periods. The above serves as a quantitative approach to understanding Jorn Utzon's lesser-known explorations in architecture.