Backbone brick

A backbone brick is an ordinary (red) building brick that has disadvantages in appearance. External walls are usually not built from it, as they will not look very beautiful. After all, it can have chips, roughness, oblique lines of edges, inhomogeneity of color and texture. It can be either with voids or solid. Its sizes can be very different, but the most common are brick 250x1250x65 mm. and 250x120x88 mm.

However, the disadvantages of the backing brick are at the same time its advantages: due to flaws, it costs an order of magnitude cheaper. And this is very often the main factor when choosing a material for construction.

It can be used for the construction of walls, which will later be sheathed with other materials or revetted or decorated. Then all chips and flaws will be hidden under other materials.

A building built of backfill bricks will look impeccable when using a special cladding bricks... The aforementioned roughness, although it has a repulsive appearance, but due to the irregularities it has good adhesion to the cement.

Poor appearance and small defects in manufacturing does not mean that this is associated with some additional risks. Because there are very specific GOST requirements. They guarantee that the structure of such bricks will last for a long time.

Usually backfilling bricks are not made on purpose, but are a by-product of production.

However, they have the same characteristics:

good frost resistance,
strength,
sizes convenient for construction.

There are various markings "M100", "M200", "M150", etc.

The number after the letter M indicates the ultimate load:

For example, M200 means that 1 cm2 can have a load of no more than 200 kg. It is perfect for building a foundation.
And M150 and M100 can be used to build a one-story building.

The presence of voids reduces thermal conductivity, which greatly enhances heat retention in the home. So this is another plus in favor of using backing bricks in the outer walls.

In the end, I would like to note that the disadvantages of appearance are more than offset by the cost. And the appearance of the walls can always be corrected by various methods.

You can find out about the features of backing bricks by watching the following video.