How To Maintain Fire-Rated Doors
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Frequency: At least every 6 months, or more often in high-traffic areas
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Check for:
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Damage to the door leaf, frame, or seals
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Warping, cracks, or holes
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Proper alignment and smooth operation
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Presence of the fire certification tag
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Ensure all hinges, closers, latches, and handles are secure and functioning correctly
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Self-closing mechanisms must fully close the door without obstruction
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Replace any worn or damaged hardware with fire-rated components
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Inspect intumescent seals, smoke seals, and drop-down seals for wear or damage
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Ensure there are no excessive gaps around the door - typically:
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≤ 3mm at the sides and top
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≤ 10mm at the bottom (unless a drop seal is installed)
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Check that fire-rated glass panels are intact and securely fitted
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Ensure the glazing beads and seals are undamaged and compliant
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Maintain the door’s surface - especially if it’s veneer-faced or steel-clad
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Avoid painting over certification labels or seals
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Keep records of all inspections, repairs, and replacements
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Ensure the fire tag is visible and legible
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If modifications are made, confirm they do not void the fire rating
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Why Maintenance Matters
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Ensures the door performs as intended during a fire
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Keeps your building compliant with NZ fire safety regulations
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Reduces liability and improves occupant safety
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Helps retain insurance coverage and certification validity