Portugal ZEP Escritórios Informations Architecture office: José Carlos Cruz - Arquiteto Picture: Nelson Garrido Located at: Portugal Included systems: N15000 VEP Facade As indicated by its name, the N15 000 facade VEP system is the external glazing system trapped. This system consists of fixed and/or opening frame profiles, mechanically fixed to the facade structure by means of specific accessories and screws. EPDM perimeter seals.