The standard gap in a fire door (as recommended by the industry), is 2-4 millimetres. To measure the gap, you can slide a simple measuring device into it. This straight away confirms whether or now the gap conforms. It is important to note that the right environment for the door is then needed to maintain this safe gap size.
How do I measure a gap in a fire door?
14 February 2020- Company registered number: 11892199
- Place of registration: England and Wales
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