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This paper discusses the most important results of a research focused on the construction process of architectonical concrete, presenting as a final result a handbook with recommendations on how to build architectonical concrete elements in the city of Medellin (Colombia). Architectonical concrete is a construction material which is able to supply both structural stability and definitive finishing. The research started by the definition of existing defects as well as their measuring techniques and tolerances. A statistical study was made in order to determine the most common defects on concrete surfaces in Medellin city. Possible causes of the most common defects were determined and, as a result of the analysis of each cause, general and particular solutions were given. General solutions focused on materials, equipment and the building process whereas particular solutions were given to each defect. Finally, the results herein presented constitute an advance in developing a regional specification, which will allow for the standardization of the processes involved on architectonical concrete construction. [ABSTRACT FROM AUTHOR]