His technical skill focused on the depiction of light and atmosphere. Roosenboom often painted river scenes and cityscapes where water reflects the sky. He used small brushes to define the texture of old brickwork and the rigging of ships. In works like Rivierlandschap met rotsen, he balanced the weight of natural elements against open, airy horizons. His compositions often feature a low perspective to emphasise the scale of the Dutch sky.

Collectors today value Roosenboom for his ability to create a sense of stillness. His prints avoid grand historical narratives. They offer a clear view of 19th-century life and nature. A piece like Boomrijk landschap met een ooievaarsnest brings a quiet, natural element into a room. These works provide a connection to the Dutch tradition of observational painting.