Hi

Got new 54mm thick doors fitted in an assisted living building, 2 wings, 2 storey, the doors close automatic about 9.45 p.m but if anybody uses them after that time, or the paper boy before 7.00 a.m the doors slam shut, make hell of a bang and shake the walls of the nearest flats ? I think the closers could probably be adjusted to make them close softer but Why cant the doors be left open all the time considering they are attached to the alarm system anyway ?

Because the fire doors may set due to the weight on the hinges and when they are required, the door could jamb, preventing them closing. Allowing them to close during the night ,at a time when the the facility is unlikely to be used, is a fair solution, a better idea is to have the self closer adjusted.