Internal fire door going flakey at the edges

[nukecad]

The one in that photo I stuck down with clear nail varnish, something sticky that comes with a little brush.
(It's useful for a surprising number of little jobs; as well as for doing nails. eg. Varnish over tile grout to seal it so it stays white. Keep a bottle in your tool bag).

A strip of ply clamped it down for 15-20 mins while it set and being a hard drying varnish it should keep it damp proof and 'hand rubbing' resistant.

[Interlaken]

Thanks nukad. A little bit like that but this is thinner and the whole long side of the door, sort of feathered. Quite possibly damp - tenant did lots of cooking and did not use the extractor. To me the logical thing would be to use Selotape but not ideal in that situation.
Rest of door appears to be good quality weight wise.

[nukecad]

almost like a thin brown paper.

It probably is thin brown paper.

Many modern doors are covered with it, a cheap version of laminate.
It tends to peel back where people grab the door edge, especially if it gets damp.
(Don't they know they should only ever use the handles?)
Like this:

20220518_122607[1].jpg

Any glue that you like will stick it back down, a bit of glue is not going to affect the fire rating (and the paper is probably meant to burn off anyway).
Clamp a block over it to hold it down while the glue sets.

[Another Fine Mess]

I noticed in my local Travis Perkins that they were selling Fire Doors off very cheaply, perhaps its worth buying a new one.

[Interlaken]

Thanks for reply Arfful. No, the top layers of finish (at the edges of the door flat surface) which look to be some sort of resin coating have gone flakey almost like a thin brown paper. I should have taken a photo before new entrant. I'm trying to think what I could stick the edges down with?

[theartfullodger]

Do you mean the intumescent strips are fraying? If so supplier (not manufacturer) compliant process.

[Interlaken]

I'v just taken back a property and noticed the edges of a fire door in the kitchen is 'fraying' - not massively but definitely affecting about 2-3mm around the outside edges. Could be condensation is the culprit but any ideas on how to secure the edges and prevent further damage?