Stone wool intumescent cavity barrier.
Specifically designed for use only in conjunction with ROCKWOOL RAINSCREEN DUO SLAB, SP Firestop OSCB forms an open-state cavity barrier within the building facade, which allows for ventilation and drainage of the cavity under normal service conditions.
SP Firestop OSCB is available in two variants giving 60 and 120 minutes' fire performance respectively: SP Firestop OSCB 60 and 120. Each comprises of a continuous intumescent strip fixed to the leading edge of a foil faced stone wool barrier, encapsulated by a weather-resistant polythene sleeve – coloured white for OSCB 60 and red for OSCB 120.
Fully tested to ASFP TGD 19, the combination of non-combustible insulation with an effective intumescent supports the construction of safe facade systems and aids the design of high-rise buildings over 18 m in height. Installed horizontally and designed to ensure an appropriate open air space is maintained, the SP Firestop OSCB is suitable for overall cavity widths up to 425 mm.
F30/18 Cavity closers
F30/180 Cavity closers
K10/530 Cavity fire barriers within partitions/ wall linings
P10/420 Sleeved mineral wool small cavity barriers
P10/70 Sleeved small cavity barriers
P10/75 Wired small cavity barriers
ROCKWOOL SP Firestop OSCB 60
ROCKWOOL SP Firestop OSCB 120
Overall cavity width
See 'Options below and insert requirement.
OSCB fixing brackets
Maximum 500 mm centres.
Pig tail screws
For ROCKWOOL SP Firestop OSCB 60 only. Maximum 333 mm centres.
Standard product features
Overall cavity width:
Available in range of sizes up to the maximum stated. Consult manufacturer's literature for details.
Standards and approvals:
Fully tested to ASFP TGD 19: “Fire Resistance Test for ‘Open-State’ Cavity Barriers used in the external envelope or fabric of buildings”.
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