LICENSE FOR THE CONSTRUCTION OF EXTERNAL THERMAL INSULATING CONTACT SYSTEMS
(Issued by Technický a skúšobný ústav stavebný, n.o.)

CERTIFICATE STN EN ISO 9001:2016
(TUV SUD Slovakia s.r.o.)

CERTIFICATE STN ISO 14001:2016
(TUV SUD Slovakia s.r.o.)

CERTIFICATE STN 45001:2018
(TUV SUD Slovakia s.r.o.)

Environmental statement of DÚHA_a.s.

Environmental Management and Audit Scheme
(Slovak Environment Agency)