35mm fire door

Six out of ten people do not know how to properly identify a 35mm fire door, according to Ironmongery Direct’s 2017 research. Identifying 35mm fire doors is important since if you do not know to keep them maintained, you are unable to check for defects. In this article, we will present a simple checklist for identifying 35mm fire doors.


A 35mm fire door’s certification label is the easiest and most reliable way to identify it. The top edge of all JELD-WEN 35mm fire doors will be marked with a certification label. The label will include the name and telephone number of the manufacturer, as well as the Certifre certification number and the fire rating of the door, for example, FD30 (30-minute fire resistance). As indicated on this label, the door is made according to third-party accreditation as a 35mm fire door. However, the door will be effective only if it is properly installed and maintained.

For a 35mm fire door to be properly installed, the gap around the tops and sides should not be more than 4mm thick. To check, use a £1 coin, which is about 3mm thick.

Smoke and flames are prevented from spreading by these seals. As they heat up, they expand to fill the gaps between the door and the frame. The frame of the door should have a thin strip running down the middle.

There must be at least three hinges on a 35mm fire door, otherwise it is not effective. Check all hinges are firmly secured with no damage or missing or broken screws after opening the door

There is usually a mechanism on top of a 35mm fire door that allows the door to close firmly into the latch when the door is halfway open. There should be no sticking from the frame or floor. In case of an emergency, this mechanism ensures that the 35mm fire door is always properly closed. A 35mm fire door that is not closed will not protect lives.Check the mechanism by opening the door halfway, letting go, and watching what happens when it is allowed to close itself.

Signage is required to clearly identify a 35mm fire door as a fire door in certain settings, such as office buildings. Identifying a fire door this way is one of the easiest ways.

Having identified what to look for when determining whether a door is a fire door, you should also be sure you regularly inspect the door to ensure it continues to perform its duties. If you find any problems, you should call the building owners or if you have them at home, you should contact a qualified installer to perform maintenance on the door so it will still protect your family and home in case of emergency.

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