Siderise RH Rainscreen Horizontal Open State Cavity Barrier is mechanically fixed to the inner wall construction using fixings for positive restraint. It comprises a stone wool Lamella barrier and an integral strip of intumescent material along the leading edge. For day-to-day usage, it leaves the cavity open to allow for adequate ventilation and drainage. In a fire, the intumescent expands rapidly until the gap is closed and a fire seal is formed, preventing the spread of fire. Once the intumescent is activated, RH Rainscreen Horizontal Cavity Barrier provides up to two hours of fire resistance as evidenced through large-scale system tests such as BS 8414 and NFPA 285.

Siderise RV Rainscreen Vertical Cavity Barrier is designed to fully fill the void between the external envelope and internal structure, preventing the lateral spread of fire. Comprising a unique Lamella stone wool core with reinforced aluminium foil faces, the Siderise RV Rainscreen Vertical Cavity Barrier can compress and flex in-line with the natural building movement common in cladding, with no loss of performance during the building lifecycle. The product has been tested to BS EN 1366-4-2006+A1-2010 and provides up to two hours of fire resistance.

Together they create a complete passive fire protection solution designed to meet the needs of ventilated cladding systems.

Features & Benefits:

Up to two hours fire resistance
Stone wool Lamella core
One-piece, pre-formed sample allowing for simpler installation
Third party certified
Involved in large-scale system fire tests such as BS 8414 (1&2) and NFPA 285.
60-year design life

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