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Fire doors may have a friable asbestos core inside a door made of millboard, or be made from cement sheeting. They may be covered in wood, veneer or cladding, and have mastic insulation that looks like a plastic coating or tape. From the top, the asbestos core often appears white. Asbestos can be released into the air if the materials are disturbed during maintenance, such as fixing door handles, locks and hinges.
Residential, Commercial, Industrial, Community infrastructure and spaces
Walls, Doors, Windows, Plant and machinery
• Residential buildings • Commercial buildings • Industrial buildings • Substations • Switch-rooms • Transformers (steel clad)
Safety door, Fire barrier door, Substation main doors
Friable asbestos is a core insulation material. It is used in some substation fire doors, in switch rooms, transformers, and in interior connecting doors. These can be clad in wood or steel, or have mastic insulation that looks like a plastic coating or tape. It is difficult to identify asbestos in older fire doors without labels or distinct markings. Newer types of fire doors are labelled to easily identify them as asbestos-free. Fire doors without labels should be treated as though they may contain asbestos.
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Fire door in plant room of a commercial building
Top of a fire door with an asbestos core. Credit: Asbestos and Hazardous Materials Consultants Association Members
Fire door made from asbestos containing materials. Credit: Asbestos and Hazardous Materials Consultants Association Members.
