The core activity of Terza Holz GmbH encompasses the planning, manufacture and assembly of wood products and constructions, particularly: interior doors, house entrances and wooden shutters; stairs, residential and industrial stairs, children's stairs; furniture and solid wood furniture; railing renovations; facades, roofs and flooring made of wood and wood-based materials; carpentry, joinery and assembly work; planning and consulting for wood construction projects; and repair and maintenance services for wood constructions. The company also offers services combining wood with other materials such as stone, clay, concrete and steel.