Gaps between fire doors and the door frame should never be more than 4mm or less than 2mm.
Gap between double fire doors.
They are abrasion resistant neoprene.
Seal the space between your double doors.
For example the maximum door gap dimension for 3 4 hour and greater rated wood fire doors is 1 8 in no over tolerance dimension is permitted.
Bs 8214 2008 states that the gap along the sides top and between the leaves of a double door should be 3 mm 1 mm.
The door gap the gap between the door leaf and the frame must be suitable for the intumescent seal fitted.
1 8 meeting edges for a pair of doors.
In general the gap should not exceed 3 mm.
British standards set out details on the permitted gaps around a fire door.
It s recommended to aim for a 3mm gap to ensure adequate room for the intumescent strips to activate in the event of a fire and for the smoke seal strips if installed to not get damaged by the opening and closing of the door.
3 4 between door and frame.
Double doors can make a grand impression at the main entrance to a home but if there is a gap between them they re losing a lot of heat.
Wraparound seals create a seal on both sides of a door.
All safelincs seals are available for single and double fire doors and can be fitted in the frame or the door leaf.
If the doors are solid wood they are susceptible to swelling and shrinkage in response to changes in the weather and these shifts are magnified in the case of double doors.
In general clearance for those allowed gaps are as follows.
The filaments are nylon for good wear resistance.
When a 1 8 in thick tool fits into the gap with no lateral movement the gap is within nfpa 80 s specifications.
Nfpa 80 fire doors and other opening protectives contains information on maximum gap allowances for different types of fire doors.
1 8.
Brush seals have flexible filaments that conform to fill gaps.