Resizing the door or fame in any way is not allowed.
Gap tolerances around interior doors uk.
Nothing must be cut at the top at all and the certification label must remain intact.
Width of doorsets 2 0 mm.
Underneath the fire door a gap of 8mm is traditionally acceptable although for fire doors that are required to limit spread of cold smoke only 3 mm is permissible with a threshold seal to be fitted if the gap is bigger.
Width of door leaf 1 5 mm.
Door leaf thickness over 1 0 mm 2 0 mm.
How much can you cut off a fire door.
Internal doors may be required to contribute to the ventilation of a building possibly by the provision of a suitable gap underneath the door to permit the passage of air.
Height of door leaf 1 5 mm.
Check that the closer shuts the door onto the latch from any position.
Height of doorset 2 0 mm.
The standard provides the following tolerances for internal doorsets leaves and frames.
Regardless of the door.
Clearance between door leaf and jamb or head over 1 0 mm 0 5mm.
Bs9999 2008 recommends for fire doors with cold smoke control that the threshold gap should be either less than 3mm in height or should be fitted with a threshold seal.
Step 3 insert door gap tool under bottom of door.
If the door does not meet these requirements the further planing is required.
An easy way to check the top and bottom is to sit the door on the floor.
2 measuring door gaps around and under doors the measurement is taken be tween the bottom outermost edge of the doors and the top of the floor surface beneath the doors.
Wall type certification compatibility alterations gaps operation.
How to fix a gap in an outside door.
4 measuring door gap at vertical fig.
If you have gaps around an outside door you could be losing up to 15 percent of the money you spend heating your home by allowing heated air to blow outside.
The gap between the leaf and frame when closed should be no greater than 5mm and no less than 3mm.
Remember there should be a gap of 2mm about the width of a nickel around the sides and top and a gap of 8mm on the bottom.
When speaking with manufacturers however a common statement is that a fire doors gap of up to 8 mm underneath the door is permissible.