One common question we receive from landlords is whether existing doors can be upgraded to meet fire-resistant standards. The short answer is yes, but it depends on the condition of the door and specific requirements.
Upgrading to FD30 Fire Door Standard
In some cases, existing non-fire doors can be upgraded to FD30 status (30 minutes fire resistance) using intumescent varnish or paint. This method is effective for unpainted doors and must follow the manufacturer’s guidelines. For already painted doors, you can use an intumescent membrane, which can be aesthetically enhanced with fireproof card or wood veneer.
If the door has glazing, the glass must be replaced with fire-rated glass to maintain the fire-resistant standard.
Hinges, Hardware, and Seals
When upgrading, it's essential to re-hang the door with at least three fire-rated hinges to prevent warping, as a warped door compromises fire protection. All hardware, such as locks and latches, must also be fire-resistant.
Adding intumescent seals is necessary to ensure fire protection, and some surface-mounted seals allow installation without modifying the door frame.
Considerations for Upgrading
Solid timber doors: The door must be at least 44mm thick and made of solid timber.
Door frame strength: The frame must support the weight of the upgraded door.
Proper fitting: Ensure a gap of 2-4mm between the door and the frame.
If the existing door doesn't meet these requirements, it may need to be replaced entirely.
Recommendation
While upgrading an existing door is possible, it's often advisable to install new certified fire doors to ensure full compliance with safety regulations. If you do upgrade, be sure to obtain certification for the work, as you may need to provide evidence of compliance in the future.
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