Nearly the entire southeastern façade of the building is covered in glass, providing people outside the museum a view of some of its items on display in the LeBreton Gallery, an open-storage exhibition space in the building. Near the top of the building's walls are a series of small windows that spell out "lest we forget/"n'oubilons jamais"" in Morse code. The exposed concrete board-form exterior is fitted with cast-in-place insulated concrete wall panels. Conversely, the entrance of the building is fitted with aluminum frames; with the canted curtain wall facing Parliament Hill.