I live in a 60 year old brick row home in Baltimore, Maryland. For quite some time, I have had a roof leak between my house and my neighbor's that's worsening. Caulking has not resolved the problem. Also, recently noticed ice & frost over entire front half of attic celing. Neither roofer wants to take the repair responsibility although I have a 25 year warranty still in effect. There is damage to the interior ceiling, a potential fire hazzard due to electrical wiring in attic, and the potential of mold. My question is how can I get the problem identified and resolved?