Surface treatment of metals Home Our services Testing Building hardware and safe and burglar-resistant products Hardware Products Surface treatment of metals Available assessment guidelines BRL 2701 BRL 2705 BRL 2705 Amendment Sheet BRL 3104 BRL 3104 English View certificate holders of this scheme Metal façade elements (BRL 2701) Metal curtain wall systems (BRL 2705) Building hardware for roof and facade elements (BRL 3104) Related standards