On this restoration project the contractor was faced with ingress of dampness from walls ,plus as part of the modernisation they wanted to provide heat Insulation prior to rendering. Earlier attemps had not been successful. To treat the dampness the walls where treated with Botament M34 sealing slurry. The Botament building board offer insulation and could be fixed to the waterproof layer with cement adhesive Botament M24. This allowed the boards to be installed without mechanical fixes thus avoiding any penetration into the protection layer behind. The joints where then sealed with Botament waterproof sealing tape SB78. The contractor then applied a render finish.