Can a fireproof cabinet be recertified after its fire rating expires?

UL fire ratings on cabinets do not expire in the sense of a certification expiration date — the rating applies to the product as manufactured. However, a fireproof cabinet that has actually been through a fire has compromised insulation and is no longer effective at its rated level, even if structurally intact. There is no practical recertification process for fire-exposed cabinets. A cabinet that has never been in a fire maintains its rated protection indefinitely, assuming the insulation has not been damaged through physical impact or water intrusion. When buying used fireproof cabinets, confirming they have never been in a fire is critical. For peace of mind, new cabinets from FindOfficeFurniture.com come with manufacturer warranty — call 888-719-4960.