My celing has been leeking on the back edge of my house for the past two years now. I thought it was my crappy roof that was on there, so I replaced it and my chimney this past summer. I went overkill on all the flashing and rubberized undercoating thinking that the water was coming through my shingles. I put a nice ridge vent on the entire house and added baffles and everything to get it nice and ventalated like it should be. This winter it started leaking again just as bad if not worse than last year. I thought maybe it was my gutters, so I siloconed them to the facial and all around each nail hole. So far no luck. My ceiling plaster can not take much more water before it starts to need to be replaced so PLEASE HELP!!! I honestly have no idea what else to do. I have a one story straight ranch with a shallow 4-12 pitch roof. All the wind and rain comes from that side of the house about 90% of the time. It also seems to be worse When it is below freezing and windy outside. I live in Michigan. All the moisture seems to be coming through the drywall and the paint, so I doint know if this could be from condisation at all. Any ideas are GREATLY appreciated. Thanks all!