Soffit Slab
Soffit Slab is a fire-resistant thermal insulation solution designed for concrete soffits. The product is made from non-combustible Euroclass A1 ROCKWOOL® stone wool insulation and is available with a variety of optional facings, including black tissue, white tissue and aluminium foil.
In addition to providing thermal insulation and acoustic absorption, Soffit Slab is tested to provide up to 4 hours’ fire protection to concrete soffits.
For areas demanding a higher impact resistance, High Impact Soffit Slab features a 6mm fibre cement facing board. This bonded solution achieves a non-combustible reaction to fire rating of A2-s1, d0.
Specification
| NBS Clause | Length (mm) | Width (mm) | *Approved thickness range (mm) |
K11 - 885 K11 - 890 | 1000 / 1200* | 600 | Plain: 50 - 250 Faced: 50 - 210 Hi-Impact: 56 - 206 |
*High-impact Soffit Slab
Standards and Certification
| Product standards | BS EN 13162, BS EN 1363-1 |
| CE Marking | Yes* |
| UKCA Marked | Yes* |
*Excluding High-Impage Soffit SLab, as no harmonised product standard exists.
Technical Properties
| Reaction to fire (Euroclass) | A1 / A2-s1, d0* |
| Fire Resistance | Up to 240 minutes |
| Thermal Conductivity | 0.034 W/mK |
| Water vapour resistance | 5.9 MNs/gm |
*High-impact Soffit Slab
Thermal Performance
| Thickness | U-value (Wm2/K) | |
| Soffit Slab | Concrete | |
| 130 | 150 | 0.26 |
| 145 | 150 | 0.23 |
| 160 | 150 | 0.21 |
CAD Drawings
Download CAD Drawings here.
