Field Labeling of Fire Doors

Field Evaluations to Nationally Recognized Standards and Local Building Codes

Field Evaluation Process

Older openings, including doors, windows, and frames, are usually not labeled, and therefore are not fire rated and most likely need to be replaced. To reduce this burden, Intertek’s Field Labeling service includes a comprehensive review of all openings in question.

If a client proposes a modification, Intertek can review it for consideration through evaluation or possibly testing. Once the opening has been modified as needed, Intertek’s Warnock Hersey (WH-ETL) Mark is applied, indicating compliance with building and fire code requirements.


The Intertek Solution

Standard ﬁeld labeling (i.e. missing labels but no modiﬁcations made to products in the ﬁeld) generally requires that Intertek perform a basic ﬁeld inspection. 

If modiﬁcations are made to a door and/or frame in the ﬁeld, then Intertek will typically address through evaluation (engineering analysis) or testing. 

When an Intertek engineer conducts ﬁeld labeling on a ﬁre door, they are relying on a wealth of knowledge of that door and an in-depth understanding of every aspect of -ﬁre doors.  Intertek’s ﬁeld evaluation process provides a broad review of all openings within a building, saving time and additional expense for clients.

Working with Intertek aligns you with a partner with the history, expertise, and industry involvement to meet all of your needs for certifying and labeling your doors and frames.

Partnering with Intertek brings you a team that can certify doors in their entirety and critically apply engineering judgements based on an extensive knowledge of testing in a quick and efficient manner.


  • Conduct a comprehensive review of all components in question
  • Provide you with a written deficiencies report
  • Offer support for modifications and corrections
  • Provide re-inspection services

Intertek’s Warnock Hersey Mark has long been one of the industry’s most recognizable marks and is found on a variety of products including ﬁre doors. This mark is widely recognized throughout the industry, appearing on fire doors found in North America and beyond.

As one of the industry’s preferred marks for ﬁre doors, it provides Authorities Having Jurisdiction (AHJs) the conﬁdence they need to approve a ﬁre door.




Need help or have a question?

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