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Fire Doors & Accessories FAQs

How big can the gap between door and frame of a fire door be?

Usually, there is a gap allowance between 2 and 4mm on the top and sides of a fire door, with the door threshold (gap under the door) between 8 and 10mm. 

It is advisable to check your core certification to check the gap allowance of your fire door. 

View all fire door & accessories FAQs


 

(doc:537 V1.0). Our articles are reviewed regularly. However, any changes made to standards or legislation following the review date will not have been considered. Please note that we provide abridged, easy-to-understand guidance. To make detailed decisions about your fire safety provisions, you might require further advice or need to consult the full standards and legislation.

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