Envimat is the first Czech interactive catalog of building materials and constructions, used to assess and compare their impact on the environment. In March 2011, the new Regulation of the European Parliament and the EU Council No. 305/2011 came into force, establishing harmonized conditions for placing construction products on the market. The document introduces a new requirement for the requirement for sustainable use of natural resources. In a number of countries, for example in France, Germany, Austria or Switzerland, there are publicly available databases of local building materials, in which it is possible to trace the impact of building products on the environment. Until now, a similar database was missing in the Czech Republic.