Corrosive impact of the streams of damp warm air going out from the underground led to the necessity of applying composite materials for decorative panels located above the underground entrances and underground crossings of Moscow. This air is condensed in the microcracks of the concrete panels on which the mosaics is located, and its freezing results in cracking. Using the composite material as the backing material for mosaic panels helped to solve the problem and increase the service life of the structure by several times.

Composite panel produced by vacuum infusion	Installation of the Florentine mosaic on the load-bearing composite panel

Moscow underground crossings with mosaic panels:

Tverskaya

Tverskoi boulevard

Strastnoi boulevard

February, 1st 2009 Mosaic panels were installed at the underground crossing of the Pushkin Square in Moscow