54mm vs 44mm fire doors - whats the proper difference?
Just carried a batch of 54 mm doors up three floors, and they’re significantly heavier than the standard 44 mm FD30 models. Is the difference simply a thicker layer of rockwool/mineral wool inside, or is the entire construction altered?
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Really makes you wonder how are fire doors manufactured, because it’s not just about thickness. The materials, core structure, and even the frame all play a part in their rating. If you’re curious about what really goes into a 44mm vs 54mm door and why it matters for safety, definitely give this article a read-clears up a lot of misconceptions!