Mizarstvo Košak d.o.o. was the first company in Slovenia to successfully obtain a certificate for wooden fire-proof windows (2017). Our fireproof windows have fire resistance of 60 minutes no. 1404-CPR-2863.
All details of the certificate obtained can be read on the website of the Slovenian National Building and Civil Engineering Institute: Inštitut za gradbeništvo ZAG Ljubljana.
The certificate applies to the following profiles: profiles.