harkko
Harkko is a Finnish term with more than one meaning. Most commonly, harkko denotes a concrete block used in masonry. Concrete blocks of this type are standard building units for walls, foundations, and partitions in Finland and other Nordic countries. They are typically made from concrete or aerated concrete and can be hollow or solid. Hollow varieties improve insulation and reduce weight, while solid blocks provide higher structural strength. Harkko blocks are laid in courses with mortar, and their size and composition vary among manufacturers and construction traditions. In modern practice, they are often used in combination with insulation, reinforcing bars, and concrete frames to meet thermal and load requirements.
In addition to its architectural meaning, harkko is also a masculine given name in Finland. It is