Ravatherm SW A2 Upstand pairs Ravago stonewool insulation slab with a 6mm fibre cement layer and is used vertically as an upstand board in the Inverted Roof finish. It meets the current Approved Document B of the Building Regulations requirement that any attachment to the external walls of relevant buildings above 11m in height must use non-combustible materials in order to be compliant. Our new Ravatherm SW A2 Upstand board has been tested for Reaction to Fire Classification (according to EN 13501-1) and achieves a Euroclass A2-s1, d0 classification.