Description
FireBlox™ Plus is a non-ventilated cavity barrier made from plain stone mineral wool, suitable for use within external wall cavities of up to 450mm, for both masonry to masonry and SFS to masonry, including masonry support bracket and balcony stub details.
Supplied as a complete slab (1200mm wide x 1000mm long x 100mm deep) and cut on site to suit the cavity size allowing for 5mm compression, foil faced as standard to stop the spread of cold smoke. Fire rated for up to 120 minutes; EI120.
Testing & Standards:
- FireBlox™ Plus has been tested to BS EN 1366-4:2021 and holds third party certification with Certifire.
- Classification Reaction to Fire EN 13501-1 and Fire Resistance EN 13501-2.
- Tested for vertical and horizontal applications in masonry to masonry and SFS to masonry, incorporating Polyethylene DPC and Interface Sealing Membrane.
- Fully tested system including FB brackets and fixings.
Installation Guide:
FireBlox™ Plus is supplied in slabs of 1200mm wide x 1000mm long x 100mm deep and should be cut to size on site to suit the cavity width allowing for 5mm compression. Joints must be abutted tightly and sealed with 100mm aluminium foil tape.
Two FB brackets to be used per 1 metre length fixed at a maximum distance of 250mm from each end, for lengths less than 500mm one bracket can be used, dimensional tolerance for bracket installation is +/- 20mm.
Minimum one stainless steel fixing per bracket.
FB brackets must penetrate not less than ¾ of the cavity width fixed through the middle of the barrier depth.
FireBlox™ Plus can be face fixed in cavity widths between 20mm and 70mm with a 3mm compression. Fix using Grayson Multi-Purpose (MP) stainless steel screws, suitable for the width of the cavity barrier and substrate. The screw head must fully penetrate the face of the cavity barrier by at least 3mm and fixed at a maximum of 500mm centres.
Watch the FireBlox™ Plus Installation Video