Class 3: Materials suitable for use in rooms of less than 30m2 • Such materials include all those referred to in Class 1, including those that have not been flame-retardant treated and certain dense timber or plywood and standard glass- reinforced polyesters. - Study24x7
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Class 3: Materials suitable for use in rooms of less than 30m2 • Such materials include all those referred to in Class 1, including those that have not been flame-retardant treated and certain dense timber or plywood and standard glass- reinforced polyesters.

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