Neil ashdown

BS 8214: 2016 Timber fire door assemblies: Code of practice states that, for doors that must restrict the spread of cold smoke, the threshold gap should be no greater than 3mm at any point. A 12mm gap is likely to be too large even for a fire door without the restricted spread of cold smoke requirement. You will likely need to install a threshold plate to the floor in remediation.

From what you say, it seems that somebody has made an aperture in the door leaf at some point? Are there any identification marks on the top edge or hanging edge of the door leaf? Whereabouts in the door leaf has the aperture been cut and how large is the aperture? Is it a flush door or a panel door and how thick is the door leaf at the point where the aperture has been cut? Photographs can be useful in cases such as these.

That's right, in order to find out what type and size of hinges as well as whether intumescent gaskets are required you would need to check the door leaf/door-set manufacturer's installation data sheet. I note that its a new installation, so the manufacturer's installation data sheet will be available.

Some composite fire door-sets will have a manufacturer's label at the door frame head underside. This provides traceability to the manufacturer so that you can contact them for information about the fire resistance rating of the door. If the fire door has third-party certification there should be a label or coloured plug fitted to one edge (usually top or hanging) of the door leaf providing details about the fire resistance rating for the door and traceability to the manufacturer. If the client has no certification, what other documentation relating to the doors do they have? Such docu

Clearly, if you are fabricating a fire door blank to produce a fire door then you must do this work within the scope of the evidence of fire resistance performance that relates to that particular door blank. You must pass the evidence of fire resistance performance, including the installation requirements therein, to your customer.

Is the fire door inspector referring to building regulations or the British Standard? Both have been updated since 2003. Ask the fire door inspector to provide details about the non-compliance issues, why they are non-compliant and to what standard or reference point.

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The door must reliably self-close to the rebate stop of the door frame. The smoke seals around the perimeter of the door should seal the gap between the door leaf and frame. Similarly at the threshold, the seal should seal the gap or if the threshold gap is no greater than 3mm then a seal is not required. These are requirements of BS 8214:2016 https://shop.bsigroup.com/ProductDetail/?pid=000000000030332501

When you say fill an old mortice lock, I am assuming either the lock is not required and you need to fill the mortice hole or that the mortice hole is too large for the lock and you need to fill the residual void or gap. I am also assuming the door is timber-based FD30 and that you cannot refer to the manufacturer for advice. If that is correct, then the hole should be tightly plugged with solid timber and any very small residual gaps filled with intumescent mastic. The edge of the door should be re-lipped with hardwood (density 640 kg per m3 or more) minimum 6mm thickness. The adhes

Fire resisting doors are tested to either BS476 part 22 or BSEN 1634-1. One side of the door is subject to fire and the criteria for a successful test is that the door does not allow fire to spread to the non-fire side. In the test door hardware such as handles and locks are fitted to the door so that it can be demonstrated that the hardware does not cause the door to fail. That does not mean that the handle/lock should be operational at the end of the test, only that fitting of the handle/lock must not cause the door to fail the fire performance test. Code locks and smart locks m

On a single leaf door, you should not fit intumescent seals to the door leaf edge where one is already fitted to the door frame. Image below seal shows options.

Yes, so long as you carry out the work within the scope of the technical data sheet for the fire door leaf. Contact the door leaf manufacturer for advice but if you cannot find out who made the door leaf consult a competent person before starting work.

Depends what is permitted under the requirements of the door leaf manufacturers certification data sheet. Is this a new fire door leaf? Or have you fabricated the door from a fire door blank? Or are we talking about an existing fire door but with no evidence of fire performance?

First deal with the glazed panel issue. Check they are fire rated and if not, assuming fire resistance is a requirement, replace with an FR glazing system. Use the link Tom has provided for some helpful guidance. The client should be aware that double-action fire doors present compliance problems in terms of fire resistance and smoke spread as compared to single-action doors. If fire safety the the priority the client would be well advised to stick with single-action doors. If they wish to press ahead with replacement fire doors it will be necessary to survey the existing door frame

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