I am tying to help my parents solve a problem that I have discovered. A persistant leak caused me go up and take a look. A florida room was added to the main house before my folks purchased the house. While I was looking for I noticed no kind of flashing ajoing the original house to the addition. Do I use a peel and seal product , galvanized pre-creased flashing and not have much roof knowlege I need to have any related details to cmplete the repair. All that I have mentioned I learned from watching Bob Villa. Any guidance is needed and welcomed. Thank you.