AIM Open State Cavity Barriers

AIM Open State Cavity Barriers (OSCB's) are manufactured from high density Rockwool stone wool and faced with an intumescent strip and colour coded for ease of identification. Open state cavity barriers allow the ventilation necessary within the wall construction. In the event of a fire, heat activates the intumescent strip which expands quickly to fully close the cavity. AIM OSCB’s have been designed and tested for use within ventilated rainscreen façades and timber frame construction, allowing free airflow and drainage. Open State Cavity Barriers offer an effective fire barrier for ventilated voids up to 425mm in width. Having been tested to TGD 19 & the general principles of BS EN 1363-1, they offer a superior fire rating of up to 120 minutes insulation & integrity with ventilated air spaces within the cavity. The AIM OSCB range is available to provide either a 25 or 44mm air gap. For simplicity the range also offers either a 60 or 120 minute rating for both Integrity and Insulation.

APPLICATIONS

OSCB’s are a polythene sleeved ROCKWOOL® stone wool and intumescent material designed for use within open state cavities (e.g. Rainscreen systems), allowing ventilation and drainage of the cavity under normal conditions while providing up to 120 minutes insulation and integrity performance in the event of a fire. The AIM OSCB range has been successfully tested to TGD 19 & the general principles of BS EN 1363-1 with a variety of substrates so that they can be used in a multitude of cavity wall constructions. The OSCB 60/25 has also been tested for use vertically in a masonry cavity up to 425mm. The AIM OSCB range has been tested to provide solutions that accommodate cladding rails interrupting the line of the barrier.