Fire Door Installation

Fitting the Ironmongery

Make sure all additional ironmongery complies per the Fire Door Certification instructions and data sheet while being compatible with the fire door leaf. Metalwork and nibs should always use the fixings supplied, and the certificate data presents the permitted materials and fixing regions, particularly bore works and face fixings. The certificate data sheet may describe additional treatment for lock cases or flush bolts in case additional intumescent protection is used. Mortising should be properly accomplished along with adding no excessive wood while removing excess, and to seal the work a piece of wood or non-combustible for over mortising should be used so that the performance of the fire door remains as required.

Intumescent Strips and Smoke Seals

Ensure that the fire door seal is of a fire rated suitable for the door leaf by referencing the applicable certificate data sheet. All certified seals should be obtained from quality manufacturers with independent certification marks and test evidence. In case seal grooves are already cut, use a dry cloth to wipe away dirt from the grooves. If this is not the case, then engage a qualified person to cut the grooves to the appropriate dimensions. Attach the seal and inspect if the seal has been installed in the designated groove. Remove the protective cover from the adhesive and insert the sealing strip into the corresponding slot with some pressure making sure it is even with the frame or the door leaf. Do not attach seals that hinder the normal opening or closure of the door. For combined intumescent and smoke seals, ensure the brush does not prevent proper door closure.

The Linear Gap Seal

Consider the certificate data sheet for any special requirements since architrave thickness, smoke control, door rating, gap width, and wall type can influence the materials and methods used. Where particulars are not given make reference to BS 8214: 2016. Acceptable materials include mineral rock fibre (Rockwool) or intumescent mastics. When foam is used, it should comply with BS 476 part 20 or EN 1366-4 fire standards. For shady doors with smoke control, pour 10 mm thick intumescent mastic that pass BS 476-22 or BS EN 1634-1 on top of the mineral rock fibre or foam. Trim the plastic packers and mastic approximately 10mm and cover them. With regard to the selection of materials, all the preservatives must meet the appropriate fire and smoke protection standards and the installation of linear gap seal components should be done in compliance with the manufacturer’s recommendations.

Fixing the Self-Closing Device

Check that the closer is suitable for the door’s location (indoor/outdoor). Verify if the door needs a closer (e.g. flat entrance, hotel room) and that the closer complies with the correct fire safety standards. Confirm that the closer has been tested with your fire door leaf and configuration. Install on the correct side (pull or push) as required. Follow the instructions and use the provided fire safety fixings. If needed for outward-opening doors, use an angle bracket. Make sure the door closes and latches without binding. Test from 90°, 45° and 75mm angles to make sure the closer works smoothly and is compliant.

Final Points

Any individual installing a fire door should be fully trained and competent to do so. Essential ironmongery must be CE marked, firmly fixed with no missing screws and must be compatible with the door leaf’s certification. Follow all relevant Building Regulations. Never cut glazing apertures on site as this will invalidate certification; it should only be done by a certificated licensed processor. Check voids between the door frame and wall are tightly packed with mineral wool. Once installation is complete, check that the closer shuts the door onto the latch from any position.

To understand more about the different requirements of fire doors, we’ve also written The Conclusive Handbook on Fire Door Regulations.