I've had a damp smell in the bathroom for a while now after rain. Given that we had a leaky roof I assumed it was related to that. The roof has now been fully replaced, but the smell is still there, and is now spreading to the kitchen, which lies under the bathroom. Any ideas what could be causing it? The smell is only after rain so I assume water is getting in somehow but I don't understand where the water is coming in now we have a new roof. TIA.