Editing Calcium silicate (section)

===Passive fire protection===
[[File:Promat signum tray cladding 1.jpg|thumb|left|[[Circuit integrity]] [[fireproofing]] of [[cable tray]]s in Lingen/Ems, [[Germany]] using calcium-silicate board [[system]] qualified to DIN 4102. Other methods for exterior protection of electrical circuits include boards made of [[sodium silicate]], bonded and pressed [[vermiculite]], and flexible wraps made of ceramic fibre and rockwool.]]
It is used in [[passive fire protection]] and [[fireproofing]] as [[calcium silicate brick]] or in roof tiles. It is one of the most successful materials in [[fireproofing]] in [[Europe]] because of regulations and fire safety guidelines for commercial and residential building codes. Where [[North America]]ns use spray fireproofing [[plaster]]s, Europeans are more likely to use [[cladding (construction)|cladding]] made of calcium silicate. {{why|date=December 2012}} High-performance calcium-silicate boards retain their excellent dimensional stability even in damp and humid conditions and can be installed at an early stage in the construction program, before wet trades are completed and the building is weather-tight. For sub-standard products, [[silicone]]-treated sheets are available to fabricators to mitigate potential harm from high [[humidity]] or general presence of [[water]]. Fabricators and installers of calcium silicate in [[passive fire protection]] often also install [[firestop]]s.{{citation needed|date=July 2017}}

While the best possible reaction to fire classifications are A1 (construction applications) and A1Fl (flooring applications) respectively, both of which mean "non-combustible" according to EN 13501-1: 2007, as classified by a notified laboratory in Europe, some calcium-silicate boards only come with fire classification of A2 (limited combustibility) or even lower classifications (or no classification), if they are tested at all.{{citation needed|date=July 2017}}