If you have a flat or low sloped roof on your house that is leaking and you need to fix this area, I would sugguest using epdm rubber roofing. If you do this yourself you can save a lot of money. In most instances you would take off the old roofing down to the wood deck and glue epdm roofing to the deck. It is always better to fully adhear the rubber to the deck. This will give you a good long term roof. Almost all epdm rubber roofing failures are related to the installation and I have found out from over twenty years of experance that a fully-adheared roof gives you less problems. Before you order your rubber roofing measure the roof and if possible buy it in one piece. This way you don't have to make any seams. But if you have to order your roof in pieces it will be easier to make your seams with a butly seam tape. This tape was developed to work with epdm roofing. You can make your seams with glue but this is more difficult and takes more experance.