Quick Links - Click To Jump To Section:

• Order References
• Features & Benefits
• Fire Performance
• Application Notes
• Disclaimers

Order References

Features & Benefits

• Suitable for use with concrete soffits where a thermal, fire or acoustic performance is required
• Excellent thermal performance
• Effective acoustic insulation
• Non-combustible stone wool insulation and facing options
• Water repellent
• Easily cut to accommodate services
• Simply butt together at joints
• Achieves a reaction to fire classification of A1 as defined in BS EN 13501-1
• Please refer to the Product Data Sheet and Installation Guide for full details of:
  • Technical Information
  • Specification Clauses
  • Installation
  • Health and Safety

Fire Performance

• Soffit Slabs have been tested to BS EN 1363-1 to offer fire protection to reinforced concrete soffits
• When applied to the soffit using the recommended fixings and pattern, 130mm thick products, with and without facings, provide 3 hours fire insulation and integrity to a minimum 90mm thick floor slab
• 160mm thicknesses provide 4 hours to a minimum 150mm thick slab

Thermal performance

Rockwool Soffit Slab has a thermal conductivity (k value) of 0.034 W/mK.

Thermal resistance of un-faced Soffit Slab:

• 130mm Soffit Slab: 3.82 m²K/W
• 145mm Soffit Slab: 4.26 m²K/W
• 160mm Soffit Slab: 4.70 m²K/W

A typical construction comprising of a 150mm concrete floor slab underlined with 130mm thick Soffit Slab would achieve a U-value of 0.25W/m²K.

A U-value of 0.20 W/m²K can be achieved using 160mm thick Soffit Slab.

Application Notes

• Installation requires contractors to simply butt together at joints
• When fixing a tile or modular system, it is advisable to start with a focus reference slab in the centre of the soffit with subsequent slabs being fixed working towards each edge
• The use of string lines or laser alignment equipment will assist in ensuring alignment and squareness of the installation
• Soffit Slabs should be fixed direct to the concrete soffit using Ejot DDS fixings with the Ejot DDT70 washer or similar
• Recommended number and pattern of fixings for each slab size are shown in figures 1 and 2 on the Product Data Sheet
• Care should be taken not to over-tighten fixings to prevent damage to slab surface
• For further information on fixing type and suitability, please refer to the fixing manufacturer
• Soffit insulation products should not be used for supporting light fittings or services
• Such installations should be supported from the concrete soffit

Please see the Product Data Sheet and Installation Guide in the 'Data Sheets' tab for detailed information.

Disclaimers

• This product should only be utilised for applications as outlined in the relevant ROCKWOOL product datasheet and in accordance with the relevant ROCKWOOL Fire Resistance Testing
• Additionally the product must be installed in accordance with the current ROCKWOOL guidelines
• For further information please visit www.rockwool.co.uk or contact our Technical Team on 0113 2455450 (option 2) or send a message to [email protected] for details

IMPORTANT FIRE PRODUCTS NOTICE: The information displayed on this website should be used as a guide ONLY and our Technical Department should be contacted to obtain a tailored specification and any advice necessary before you place an order for fire protection products. Fire protection products are non-returnable except in accordance with Condition 8 of the Terms and Conditions and should be applied only by an individual with the necessary expertise and experience. We will not be held liable for any resulting damage to property, human life or monetary costs incurred due to the incorrect specification you have prepared or use of fire protection products caused by your negligence, including your failure to have contacted us to obtain the relevant advice/specification.