The owner wants to decorate, and the property should sign a bathroom waterproof agreement with him to prevent the downstairs property from being difficult to handle. How to ask for the specific conten

The owner wants to decorate, and the property should sign a bathroom waterproof agreement with him to prevent the downstairs property from being difficult to handle. How to ask for the specific content of the agreement? Don't use this complexity. The owner decorated it himself, and it is the responsibility of the owner to leak water downstairs. There is no agreement, and the law also stipulates this. What is there to write about? Provide professional technical consultation on waterproof and leakage repair of concrete free of charge, so as to avoid the troubles of repairing today, leaking tomorrow, repairing every year and leaking every year.