Annex 6 : External wall system appraisal flowchart
 Many external wall systems have cladding which achieves European Classification A1 (non-combustible) or A2 (will not significantly contribute to fire load and fire growth) and may be considered low risk. However, when the whole external wall system including any insulation material behind the cladding is considered, the system may still be of concern and require further investigation.
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