Born in the Netherlands, in all probability, Loemans was active artistically in Canada and the northern United States. Few facts are known about Loemans, but he seems to have traveled extensively, painting scenes not only in North America but, like Frederick Church, painting panoramic landscapes of the tropics of South and Central America as well.

Loemans' style was decidedly that of the Hudson River School, though he seems to have specialized in dramatic depictions of famous waterfalls, such as St. Anthony Falls on the Minnesota River. Waterfalls form the compositional center of nearly all known works by Loemans.

In the collection of: the Minnesota Historical Society, the Minneapolis Public Library, the Museum of Fine Arts of St. Petersburg, Florida, the New Brunswick Museum, and the Art Gallery of Hamilton, Ontario.