Verified by manufacturer 3 months ago
Non-ventilated cavity barrier for vertical and horizontal applications.
Designed for use within external wall cavities of up to 450 mm, for both masonry-to-masonry and SFS-to-masonry configurations, including masonry support bracket and balcony stub details.
FireBlox™ Plus is a non-ventilated cavity barrier composed of plain stone mineral wool, foil faced as standard, intended for installation within external wall cavities up to 450 mm, requiring 5 mm of compression when fitting, and compatible with both masonry-to-masonry and SFS-to-masonry applications, including masonry support bracket and balcony stub details, with a fire rating of up to EI120.
Features and benefits:
| Color | Silver | 
| Finish | Foil | 
| Material | Mineral wool | 
| Shape | Rectangle | 
| Length | 1000 mm | 
| Width | 1200 mm | 
| Height | 100 mm Guidance for specification option: Depth. | 
| Uniclass | |
| CAWS | P12/40 Mineral wool rigid batts P12/360 Mineral wool rigid batts | 
| Classification data | |
| Material | |
| Standard | To BS EN 1366-4:2021. | 
| Third-party certification | Certifire certification. | 
| Type | Rigid. | 
| Facing | Metal foil laminate. | 
| Fire performance | Reaction to fire classification EN 13501-1 and fire resistance EN 13501-2. | 
| Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 20–26%. Manufacturer guidanceProduced from renewable raw materials with zero ozone depletion potential (ODP). | 
| Dimensions | 1200 x 1000 x 100 mm. Guidance for specification option: Width x length x depth. Bespoke. Guidance for specification option: Cut-to-size. Consult manufacturer for details and insert requirements. | 
| Fire rating | Up to EI 120, 120 minutes. Guidance for specification option: The exact level of performance will depend on the orientation of the Fireblox and on the construction of the external walls. | 
| Cavity width | External wall cavities of up to 450 mm. | 
| Orientation | Vertical. Horizontal. | 
| Fixing | Not required. FB bracket. Guidance for specification option: Small brackets: up to 250 mm cavities. Medium brackets: for 251–450 mm cavities. FB-C stainless steel screws. FB-S stainless steel screws. | 
| Accessories | Not required. Polyethylene DPC and interface sealing membrane. | 
| Country of material origin | United Kingdom | 
| Country of product manufacture | United Kingdom | 
| Material | Mineral wool | 
| Recyclability | Yes. | 
| Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 20 % Guidance for specification option: 26% maximum. |