56mm Ravatherm SW A2 Upstand Board is a stone wool insulation slab with a 6mm fibre cement layer on top that provides a natural, non-combustible insulation solution in inverted roof finishes. It meets the Approved Document B of the Building Regulations 2010, which requires that any attachment to the external walls of relevant buildings above 11m in height must use non-combustible materials in order to be compliant. Ravatherm SW A2 Upstand Board has been tested against Reaction to Fire EN 13501-1: 2018 and achieves a Euroclass A2 – s1, d0. Ravatherm SW A2 board is to be used vertically as an upstand board in the inverted roof finishes.