Tom Sutton

I agree with Torx if you go to http://www.firesafe.org.uk/fire-doors/ there is a diagram showing the location where the intumescent strip should be fitted. On both long sides and the head of the fire door. Try http://www.ifsa.org.uk/pdf/Information%20Sheet%20No1.pdf for more info.

Hold a hair dryer underneath it but don't use a heat gun instead of a hair dryer (unless you are very careful). Heat guns are liable to melt the plastic!

Further to my above posting I should say even if you premises is not a HMO then the common parts are still subject to the Regulatory Reform (Fire Safety) Order 2005. This means the common parts require a fire risk assessment and this is maybe what the landlord has done and is implementing the findings of the fire risk assessment.

Go to http://www.firesafe.org.uk/houses-in-multiple-occupation/ this my help.