to prepare the mortar and concrete and other construction materials, to cut the brick and the prefabricated pieces and insert them into the forms, to measure and erect partition walls and walls, arch openings, to work with bricks on masonry and vaults, including stone walls to put the bricks in their place to make plaster repairs to build, to put insulation against humidity and high temperatures to repair cement floors, pavements, tiles and mosaics to climb the scaffolding when necessary and work at height using protective equipment