Holy Rosary church is unique in the Islands for its use of concrete bricks with cast-stone details. It is fireproof throughout, with only its doors and pews made of wood. An imposing edifice, the church features an elegant, seventy-foot-high rear-corner bell tower and front-window tracery. Cast-stone ornamentation, including corbel-arched openings, portico finials, and the stepped gable's baldachin and Celtic cross, contributes to the overall attractiveness of the building. Inside, Tudor-arched clerestory windows and ornate hammer beam trusses adorn the nave. Stained glass windows are the work of the M. Barry firm of Brussels, Belgium. The handcarved hardwood altar and stations of the cross were produced on site by Brothers Sylvester and Wenceslaus of the Order of the Sacred Heart. These craftsmen also repaired and renovated the nineteenth-century carved wooden statuary which came from Holy Rosary's predecessor, a church dating to the 1880s at Kuau.