Neil ashdown

Samual Heath at https://concealeddoorclosers.com/powermatic-r100-concealed-door-closer/ New Star at https://www.new-star.co.uk/products/agb-eclipse-self-concealed-hinge-with-door-closer?_pos=1&_psq=self-closer&_ss=e&_v=1.0 Contact them and the door manufacturer to check suitability for your type of door, fire rating and end use.

Fire resistance performance test evidence does exist for some night latches. But compliance also depends of the core-type for the timber-based fire door in question. An experienced fire door inspector should be able to assist you. Failing that, an experienced fire risk assessor may be able to help.

If that's the only reason why the latest inspection has found the door to be unsuitable, the inspector would need to back up their finding with the relevant documentation.

If the installer says the door is non-compliant due to the thickness being 42mm or 43mm (rather than 44mm) and requires replacement, they should back that up with the relevant documentation (guidance/certification/product data sheet etc). If they can't, then what basis do they have for making that recommendation?

So, has the Installer said why the door needs to be replaced? At residential blocks below 11m in height, there's no statutory requirement to inspect fire doors to a particular schedule but there is (under Article 17 of the Regulatory Reform Fire Safety Order 2005) a legal obligation, as you would expect, to ensure fire doors "are subject to a suitable system of maintenance and are maintained in an efficient state, in efficient working order and in good repair". See https://www.legislation.gov.uk/uksi/2005/1541/article/17

End to end butt jointing of intumescent seals is acceptable if done tightly and well fitted. But don't mix different types. This website is worth visiting https://www.ifsa.org.uk/

The thickness of the door depends on the relevant certification / evidence of fire performance for the door. Also see Also see https://www.howdens.com/joinery/doors/howdens-spey-35mm-plywood-flush-fd30-fire-door-obj-sku-family-25409973 Refer to the relevant UK Gov fire safety guidance for the type of resirential block inn question eg: https://www.gov.uk/government/publications/fire-safety-in-purpose-built-blocks-of-flats https://www.gov.uk/government/publications/making-your-small-block-of-flats-safe-from-fire

You could consult https://wilkinsoncc.co.uk/ for certainty about your responsibilites.

You could try https://www.ironout.co.uk/

Sorry I don't, you could try third party certificated companies for example https://www.blueskycert.com/installation-maintenance-and-inspection/

Based on my experience it might be from this company? https://www.komfort.com/products/timber-doors-frames/?portfolioCats=173

Does the door security viewer (spy-hole) have an intumescent gasket between the viewer and the core of the door. If it has, that's a good sign that its compliant. If the door is on an escape route, the lock should be a keyless egress (thumb-turn etc). Removal of the viewer and gasket will enable you to inspect the core of the door too.

42mm minimum Check out Certifire certificates of approval for intumescent edge seals.

"As I have mentioned before we have Windsor Type doors with 10 panels per door, 5 at the bottom, up to 80cm x 10 cm wide." Difficult to see a safety issue with clear wired glazing in a door when the glazed panels are only 100mm wide.

Generally speaking, product performnace certification for fire doors does not cover repairs to the fabric of the door. There are certification schemes for repairs and they have limited scope for the extent of a repair. If you are unsure about whether a repair is appropriate, consult a specialist. They can issue a report stating whether the repair is fit for purpose..............or not.