What is the liability for damage caused by actions benefiting a mosque or communal space?

Primary text

If someone roofs a mosque, spreads a mat in it, installs a door, creates a shelf for the benefit of its people, or hangs a lamp, and something is damaged as a result, there is no liability upon him. Our evidence is that he performed an act of benevolence and committed no aggression, so he is not liable for what results, just as if the Imam and the neighbors had permitted it. Furthermore, this is permissible by custom, as the practice of voluntary contribution without seeking explicit permission is established, thus liability is not required, similar to actions explicitly permitted.