From 1945 to 1950 Heerich studied fine arts at the Kunstakademie Düsseldorf under Ewald Mataré.
At that time, he chiefly produced sculptures representing animals and drawings of plants.
Heerich emphasized that for him, "cardboard, like polystyrene, had no specifically aesthetic or historical connotations, the materials are value-neutral to the largest possible extent."
Furthermore, the artist was not primarily "concerned with the manifestation of an art object, but with making an idea material in terms of a specific problem: how space can be presented and formed.
From 1982 to 1994 he created eleven exhibition pavilions for the Museum Insel Hombroich, which were called "chapels in the landscape".