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Note added at 20 mins (2017-12-03 15:47:57 GMT)
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Brickwork defect occurs in building has a variety of reasons. This is perhaps not surprising when one considers the wide range of differences bricks and technique in construction of building, differences in the construction sites and the varied occupational or owner used of the completed building.

Brickwork will deteriorate and decay if not properly maintained. Such deterioration can be caused by a number of factors and can take various forms. The main signs that brickwork is suffering are surface growth and staining, efflorescence, loosed brick becoming dislodged, crack appears throw the bricks or mortar and etc.(Moses Jenkins, 2007)

https://www.ukessays.com/essays/construction/the-types-of-br...

SOURCES OF DEFECTS IN BRICK MASONRY
There are 4 primary reasons that cause defects in brick masonry work. These are as follows.

Sulphate Attack
Crystallization of Salts from Bricks
Corrosion of Embedded Iron or Steel
Shrinkage on Drying

http://civilblog.org/2015/09/21/what-cause-defects-in-brick-...
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Missing pieces related directly to ubytki.

Spalling or spalled brick is one type of brick defect, affecting the facing of the brick, usually due to freeze-thaw cycle.
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Dlsassembly and reconstruction is not reasonable because of the deterioration ol the present structure: crumbling condition of the brick and the amount 0! missing pieces of brick and stone.
https://books.google.com/books?id=HcY1AQAAMAAJ&pg=PA184&lpg=...

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According to a city report, the building's exterior shows clear signs of neglect with missing pieces of brick veneer, damaged and missing windows.
http://windsorite.ca/2016/09/bridge-house-tavern-could-meet-...
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n-reinforced masonry, large un-reinforced concrete block, and old load-bearing timber structures with preexisting cracks in facade, with missing pieces of brick or plaster
https://books.google.com/books?id=WvA3AQAAMAAJ&pg=PA300&lpg=...
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Some problems can be addressed with relative ease, like replacing loose bricks, while others such as efflorescence – a powdery residue on the brick surface – or spalling, missing pieces of brick facing, can be more difficult to repair, as the original brick-maker likely went out of business decades earlier.

http://www.constructioninfocus.com/2017/09/14/paying-respect...
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If the water evaporates before it reaches the surface, the salts (the same thing that causes efflorescence) are deposited inside the brick where they expand and exert pressure on the surface of the brick. This, along with freezing temperatures, will cause pock marks to develop in the face of the brick and chipping to occur - http://www.oldlouisville.com/circa1900/brick-structures.htm

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The symptoms of frost damage are pock marks and flaking of the surface of the brick face. Where damage is not too extensive, you can paint the bricks with several coats of clear silicone fluid, which repels the water, binds the substance of the brick, and so minimises the damage. - https://www.property24.com/articles/fixing-damaged-brickwork...

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