Siderise RH Cavity Barriers have proven their passive fire protection capabilities as part of a ventilated facade system again— this time as part of a brick slip façade system which successfully met the requirements of BR 135 when tested to BS 8414-2.
BS 8414-2 is a 60-minute large scale system test that mimics a fire breaking out of a window and exposing a cladding system to a severe fire. The test was conducted independently by international consultants Thomas Bell-Wright and comprised a 28mm Ash & Lacy’s MechSlip Brick Cladding System, combined with stone wool insulation slabs, and Siderise RH25 and RH50 cavity barriers used horizontally and vertically with associated galvanised steel brackets. The system was fixed to a steel framing system and the result only applies to this configuration. Passing this test means that this configuration meets the new requirements for buildings over 11m in England under Approved Document B.
Siderise RH Cavity Barriers are a partial-fill product made from a compressed stonewool lamella core, incorporating a continuous bonded intumescent strip along the leading edge. This allows for the air flow and drainage necessary for a ventilated facade; however, when exposed to the heat of a fire, the intumescent strip will rapidly expand to fully seal the gap and protect the facade system from fire spread.
Siderise is committed to third-party testing all its products. It is a strong advocate of large-scale fire tests, which are invaluable to understanding how a whole facade system— including its cavity barriers and firestops—performs in a realistic application.
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