Several months ago I had a new roof put on. A couple of months ago I noticed condensation on the sloped bedroom ceiling. There is no plumbing above the ceiling at all, and no crawlspace. There is a skylight, and the condensation appears every morning, evenly distributed about 2' above the skylight, as well as below it. During the day it always dries out. It does not appear on either side of the skylight, and again, it is evenly distributed about 2'x2' above and below. There are no water spots at all on the ceiling. I've called a plumber out to make sure there is no plumbing there, and I called a skylight company out to inspect the flashing around the skylight. Again, no problems there.
I saved the wrapping from the roofing shingles. It's a 30-year-composition shingle made by Timberline. The specs call for a double layer of paper if the slope is less than 12/4. I measured the slope and it is 12/2. My contract with the roofer states that the requirements for a flat or low pitch roof are not applicable, so I'm thinking that only one layer of paper was put down. He is coming out in two days to check out the roof. I plan on having him pull up the shingles around the problem area, and if there aren't two layers of paper, I'll have him rip the entire section of roofing off, put down the two layers of paper, and then replace the entire area with new shingles as well. Is this a reasonable demand? The rest of my roof has a much greater slope (the bedroom was an addition added 30 years ago), so only the roofing over the addition would have to be replaced. My husband died, so I am on my own here. Am I doing the right thing? Can you think of anything else other than the roof that might be causing the problem? Oh, and I always use the shower in another part of the house, so the condensation isn't coming from the inside. Also, the windows never have condensation on them in the morning.