Product description



  • Third Party certified system (Certifire)
  • Tested to EN1364-4 and EN1364-3
  • Proven by EN1364-4 during fire test accommodated dynamic movement of supporting structure and facade
  • Fire rated to 300 minutes (insulation / integrity)
  • High acoustic performance additional upgrades available


Certifire approved 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 twenty years, we have developed a range of products that present an unrivalled combination of fully qualified performance, practical installation and service benefits.

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.

Watch the SIDERISE CW-FS installation guidance video.