Siderise launches 2-hour rated version of its RH25 Rainscreen Horizontal Cavity Barrier

Siderise RH Rainscreen Horizontal Cavity Barriers  are used to protect building façades around the world. To meet the growing industry demand for fire resistance performance that goes beyond requirements, the passive fire protection manufacturer has launched a new 2-hour rated version of the product, suitable for air gaps up to 25mm. 

The RH Rainscreen Horizontal Cavity Barrier has been developed to meet the complex requirements of ventilated cladding systems. The Lamella stone wool barrier includes an integral strip of intumescent material along the leading edge which, when exposed to temperatures > 130°C, exfoliates to close the residual gap and prevent the spread of fire within the time required by the relevant test standard and detailed in our certification. This latest version of the product achieves 120 minutes Integrity (E) and Insulation (I) when tested to ASFP TGD19 (prEN1364-6) ‘Fire Resistance Test of Open State Cavity Barriers’ following the strict furnace controls set by BS EN 1363-1:2020. This performance has been independently assessed and is IFC Certified (IFCC 1712).  

As a core product, RH Cavity Barrier also has been put through EOTA TR 024 ‘Type X’ accelerated age testing to confirm its long-term durability. This is the most rigorous category available, replicating exposure to rain, UV, high temperatures, and frost and thaw cycles. This testing has proven it has a 60-year design life.  

All Siderise products are also backed by its industry-leading technical ‘wrapper’, designed to support the passive fire safety of projects from initial design to handover with a range of services for design advice, training, and inspection.