When an Intumescent seal is fitted onto double swing doors should it go the full length of the door? I have looked at some doors today that have recently been installed and the seal is fitted between the bolts that go into the floor and the lock and from the lock to the top of the frame. This doesn't seem right to me, as if the seal had been put on the opposite door it could have been fitted to go the full length of the door. Can anyone advise me on the requirement and/or where to find the relevent standard/regulation. Many thanks.

if it doesn't cover the entire door frame, it cannot seal therefore is not fir for purpose.

Going by what is written my opinion is the fire door set has been incorrectly installed. Fire door sets have to be installed by approved certificated tradesmen who have completed training, they know everything to know about installing fire doors. There is a lot more to it than just the installation. Intumescent strips expand to many times their size and are designed to prevent the passage of smoke and fire.

Its just the same as appointing a health and safety consultant, there are registers but you can appoint anyone you want to. There are registers of fire door installers and they train to install correctly, I am not one myself but have listened to such people and there is more to it than simply installing. Would you employ an untrained plumber to install central heating at your home?