It’ll be to do with the door closer, but would also think it’s to do with fire mitigation. As it’s communal would it be the landlord (if it has one) anyway?
That doesn't matter. Just need to stop slammingyou need to check the door closer -they often have 2 stages, the final one is slow to reduce slamming. The problem is that its hard to overcome the latch with slow movement -if you succeed to stop the slamming you will find it probably wont clip on the latch.
The adjustment screws[slotted] can be seen in the pic, one adjusts closing speed the other catch speed [last 5-10 degrees].As mentioned arm is incorrected fitted, should sit at 90 degrees to the door when closed.You need to secure the hinge pin which is sticking out before the door falls off.
If there is any sign of oil on the door then seals have gone and needs replacement.
instruction for fitting .
https://ironmongerydirect-assets.s3.amazonaws.com/product-documentation/fittings/465901.pdf
No idea who put it in, I'll ask. Probably been like it for years.As John says - the closer is installed incorrectly. The arm should either be parallel with the door or at right angles to the face of it when the door is closed. The mounting bracket on the frame is normally just above a and slightly inboard of the "knuckle" on the closer body. I agree with him that in many cases the latching won't work properly or at all when incorrectly installed like this. Can't understand why this was done - RTFM failure, perchance?
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