We call concrete block those made with this material and that is usually 39 x 19 x 19cm or 39 x 12 x 19 cm. The first is for walls commonly called 20cm thick and the second 15cm.

They have only two holes and weigh approximately 16kg the first and 9kg the seconds for each unit.

They are widely used as exterior walls seen and also leave the interior seen being able to be smooth or textured on one of their faces as well as having different colours.

The hollow ceramic brick block can be load bearing or not and the dimensions are 18 x 18 x 33cm and 18 x 12 x 33cm.

The cement block Machine is very used lately for houses with both sides seen, which means that they have to follow the instructions of the manufacturers with a lot of meticulousness.

Compared to the brick block, its weight almost doubled. They have their edges and sides more perfect due to their manufacture in moulds while the ceramic being extrusion material is more imperfect.

For placement, for example, concrete blocks should not be wet, in fact, they should be protected from rain and night dew before being placed.

There are multicellular concrete blocks with out-of-phase interior air chambers that break the thermal bridge, but they are not yet on sale in bulk.

The concrete block, if it is visible on both sides, should carry a product that protects it from the outside as a skin, as waterproof insulation. They are water-based products and are placed as a transparent paint.

It must also have a thermal insulator inside, otherwise it will not comply with the minimum requirements of habitability and moisture spots may appear inside due to condensation.

The outside joints are very delicate because that’s where the water can leak if they are not properly made.

Regarding the vertical and horizontal chains, the requirements of the manufacturers must be met, something that is not always done correctly.

The concrete block requires a very rigorous modulation since they should not be cut, that is to say, that it will have to be taken as a half block module. This often makes it difficult to materialize this requirement, especially where there are openings with standard sizes.

Regarding the ceramic block, if it is going to be revoked on both sides, the concrete block would never be placed due to the difficulty of placement and thermal requirements. In addition, it is difficult to install embedded pipes, which is why they are generally visible.

Manpower for a concrete block is much more expensive, starting with the manipulation where the weight doubles the other, up to all the care that must be taken in its placement, a task that takes much longer to perform compared to a ceramic block.

All this is not to discourage the use of the concrete block but to take into account that both with this material and with others of the similar difficulty of placement, it requires highly skilled labour and only in that case I recommend its use.

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