I bought a new top with a loft, ready to decorate, would like to ask whether it should be waterproof?

I bought a new top with a loft, ready to decorate, would like to ask whether it should be waterproof?

Of course, is better to do waterproof. The The The

Waterproof 5-year warranty, pipeline 2 years, the warranty period of non-human developer responsibility, expired self-care, the public part of the upstairs under the cost of maintenance! Re-decoration, destruction of the original waterproof layer, redo waterproof is a must, decoration company to provide 5 years waterproof warranty! Free of charge to provide concrete waterproof leaking water repair professional and technical advice