I call for 7 unsullied fire doors. How much would they cost me respectively? ...
Answers: It will depend on a few variables. Firecheck doors with a partly hour fire rating come usually in 45mm mass; that will mean replacing the existing door frames if they are 38mm rebate. Sometimes a door frame has planted stops that can be removed; if your frames own these you will need to purchase the appropriate planted stops for a partially hour firecheck door, and fix them using glue & screw.
Doors themselves can go from pretty cheap (lb30) for partial plywood, to lb150+ for pre-finished doors. Bear in mind that firecheck doors require different ironmongery to standard lightweight internal doors, so this will be an optional cost.
I would say as an average; lb50-lb75 per door to buy, another lb25 per door for handles/hinges/latch, and a joiner will usually charge around lb25 per door to fit them. If the door frames want to be replaced don't forget to include this, expect to pay at lowest possible lb40 per frame supplied and fitted.
Also, if you're fitting them into a rental property that you are the landlord of, they will inevitability to have closers fitted, any Briton spring type overhead closers, or Perko type concealed springs.
we fit them.. email me