How to check fire door gaps
Watch our certificated Fire Door Inspector guide us through the steps to check the size of your door gaps using one our gap testers.
When a fire breaks out, a fire door can save your life, but it won’t if it isn’t properly installed, maintained and regularly inspected.
In general, the gap should not exceed 3 mm. You can check the size of your door gaps using one our gap testers.*
If the door gap is too big, smoke and fire could travel through, so it’s important to check that the fire door is fit for purpose.