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Door Gaps & Tolerances
Perimeter gaps
Correct door gaps are essential for fire door performance, smoke control and reliable operation. This section explains perimeter gaps, threshold clearances, measuring techniques, acceptable tolerances and practical methods for correcting common issues found during installation and inspection.
Door Gaps & Tolerances
How Do You Check Fire Door Threshold and Floor Clearance?
Published: October 11, 2026
Door Gaps & Tolerances
Why Does a Fire Door Gap Change from Top to Bottom?
Published: October 6, 2026
Door Gaps & Tolerances
How Should You Measure Fire Door Gaps for Fault Finding?
Published: October 6, 2026
Door Gaps & Tolerances
Why Does a Fire Door Gap Change When the Frame Is Loaded?
Published: October 6, 2026
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