The quality seal initiative for construction materials to be incorporated into heritage rehabilitation/restoration works is born on the one hand from an appeal from the institutions and actors involved in this field in the face of recurrent evidence of bad performance or experiences in rehabilitation, and on the other from the verification that the performance of materials to be used in heritage works, in relation to their essential characteristics, cannot be evaluated only according to existing harmonised standards, so an additional technical assessment of suitability for heritage is necessary on the basis of new evaluation criteria not covered by the legislation, given the specificity of the use for which they are intended.

TESELA is a company that owns the spin-off UGR brand that is granted by the University of Granada to those companies created from the knowledge and technologies generated at the University of Granada, accrediting it as a company based on innovation in a specific area of knowledge, and in the case of TESELA corresponds to building materials, raw materials, historic buildings and Heritage. TESELA is a company whose main activity is research and technological development in construction materials and raw materials in general, and for use in heritage works in particular, which has a wide experience and knowledge in this field.