SIDERISE CW-FS | Perimeter Barriers and Firestops for Curtain Walling

SIDERISE CW-FS systems offer an extensive range of solutions for fire stop, smoke stop and sound barrier requirements in all architectural cladding panel applications.

Based on the experience gained through being the premier supplier to the UK curtain walling market for over 30 years, we have developed a range of products that present an unrivalled combination of fully qualified performance, practical installation and service benefits.

  • No. 1 in the UK for over 30 years
  • Third-party approved options: Certifire & Intertek certification
  • Fully compliant to: UK, EU & UAE regulations
  • Fire Resistance to: EN 13501-2 (EN 1364-4, EN 1366-4)
  • Proven by EN1364-4 during fire test accommodated dynamic movement of supporting structure and facade
  • Classified ‘A1‘ to: EN 13501-1
  • Market leading fire resistance and smoke seal
  • Suitable for horizontal and vertical application
  • Fully qualified acoustic performance with additional acoustic upgrades available
  • Simple and quick to install


The primary function of the CW system is to maintain continuity of fire resistance by sealing the gap between the compartment floors or walls, and the external curtain wall, both horizontally and vertically.

Note: This product was previously known as Lamatherm CW-FS cavity barriers & firestops for curtain walling.