What cause concrete and balustrade block to deteriorate at trustworthy times of the year and is at hand a fix? Seems to be in the winter or after like mad of...

Seems to be in the winter or after like mad of rain. Happens to concrete balcony too. A white residue forms and then the concrete or blocks start to slowly drop apart.
Answers:    Moisture freezing in them bust them up and next they deteriorate later.

Some times the inspired pour of concrete was too showery and in the moisture and rainfall they fall apart.
moisture. murderer of a lot of things. The concrete blocks sorta swell up and are natural to break. That's why when you build a basement, you drive adjectives the moisture to a sump pump so this won't happen.