Could you please tell me if there is a maximum gap size between the fire door and frame after which the intumescent seal will not work. I have been told by a carpenter that this is 3 mm.

Thank you

That is the average gap and is documented in British Standard BS 8214:2008 Code of practice for fire door assemblies.

9.5.2 Clearance gaps

Failure of fire-resisting door assemblies under test is very often due to burn-through at the clearance gap between the door leaf edge and the door frame. Doors should be hung to give an equal gap across the head and down both jambs. A typical gap to achieve good fire performance is between 2 mm and 4 mm.

NOTE Guidance on operating gaps for timber doorsets is given in BS 4787-1 and BS 5588-112).

I recently attending a fire risk and safety management course and was advised to obtain a gap gauge with a mirror fixing to be able to check fire doors. I have not been able to find such a unit and wondered if you might be able to advise where this course be purchased?

Any information would be appreciated.

Many thanks.

Roz

Hi Roz

Safelincs provides these fire door gap testers free of charge. Just email service@safelincs.co.uk

Harry

Thank you. I have today sent in an Email for 3 of your finest door gap testers!!!!

Email received and gap gauges sent :-)

They are different to the BWF ones but still look useful and handy!

Is the offer of free gap testers still available

 

Hi Martin, yes it is, just email service@safelincs.co.uk

Harry

I've emailed too for some. Will come in extremely useful!!

Hi

Just come across  this I'm looking  for 5 Fire Door Gap cards could  I order them here

Hi Nicola, they can still be requestyed at service@safelincs.co.uk

Harry

Hello,How do I solve the gap on frame where the lock plate is my fire door has recently failed because there is a gap between intumesant strip and door latch plate measuring 180mm 

Its OK.  The intumescent strip & smoke seal may be interrupted at lock and hinge fixing points.  If the inspector/assessor disagrees, ask them to provide specific evidence that the seal must be continuous and uninterrupted.