T: 01858 410 372
E: techenquiries@radmat.com


Soffit Insulation

ProTherm RockFace A2 SL Soffit Board


ProTherm RockFace A2 SL is a Non-Combustible Soffit Insulation Board designed to insulate semi exposed concrete soffits. Classified Euroclass A2-s1,d0 to BS EN13501-1:2108 by Warrington Fire under classification report no. 19808F dated 10 10 2019. Manufactured with non-combustible stonewool it will not develop smoke or promote flame spread, even when directly exposed to fire. The stonewool is factory laminated to a 6mm thick weather resistant high impact facing board.

As an example of thermal performance .025W/m2K can be achieved if a 136mm (O/A) panel is fixed to a 150mm dense concrete slab in a semi-exposed application.

Available in a range of thicknesses, see declared performance table for available thickness. RockFace A2 SL has a Zero Ozone Depletion Potential (ODP), a Global Warming Potential (GWP). Certificates ISO 9001@2008 Quality Management System, ISO 14001 :2004 Environmental Management System, EPD as per ISO 14025 and EN 15804.

For a comprehensive NBS J31 specification contact Radmat Building Products.


RockFace A2 SL can be mechanically fastened to:
the underside of a profiled steel, flat steel or concrete soffit on buildings over 18m providing the structure meets the performance requirements of BS9991:2015, Approved Documents B and BS 8759:2020.

timber battens on buildings under 18m providing the structure meets the performance requirements of BS9991:2015, Approved Documents B and BS 8759:2020.

Please Note

Due to RockFace A2 SL being manufactured from organic products natural colour variances will occur between batches.

RockFace A2 SL is supplied as a performance product rather than decorative one.

RockFace A2 SL can be over-coated to provide a decorative or consistent finish.

For installation instructions please see Product Data Sheet.

Description  Value
Board Width 600mm
Board Length 2000mm*
Board Thickness overall 56, 116, 136mm
Board Weight RF56, 18kg / RF26.5 /RF136, 29.5kg
Core Stonewool non-combustible insulation
Thermal Conductivity Core 0.038 W/mK
Fire Performance Euroclass A2-s1,d0 WarringtonFire

*smaller boards 1000mm x 600mm are available for thicknesses above 100mm


Click on the items above to view or download information. To download multiple items as a zip file click + to add to a collection.

Please Login before adding files to a collection.