There are a few demands for fire performance and safety that are common to each building materials but which do not have serious ramifications for use of slates. After many years of wrangling over fire tests it has been decided which for external fire performance and effect to fire; slates is considered to satisfy and never need to be tested. Natural slates in addition never production dangerous components and also providers dont really want to make declarations on this issue.

Natural slate do not generate harmful toxins