Problems You Might Find After a Roof Replacement

http://www.nachi.org/forum/attachment.php?attachmentid=95831&stc=1&d=1436475308

This photo is an example of what to look for inside, after a new roof has been installed. It is very common for roofers to move a water heater flue or gas heater flue during the installation of a new roof. They do not think about it becoming detached from the component.

Welcome. Good first post. Agree it is all too common of a problem that hopefully gets discovered before something fatal occurs!