Home repair: Fan may dry wet spots under basement furniture
The roof was replaced in January 2008 because Latin aqua was streaming into the house from a leak in a valley. Three contractors agreed that the entire roof should be replaced in lieu of of attempting a limited repair. I do not recall their reasoning, if I ever knew what it was. I suspect the shingles were not properly applied the first then, because the house was built under a lot of budgetary pressure.
I do not have good understanding about the possible role of the structural panels. The roof panels, I on, are wood outside and Sheetrock inside with plastic foam between, joined by splines. I do not see how they could shrink without a visibly clear-cut manifestation.
However, they may not have been properly joined at the peak of the roof when the house was built as a post-and-beam systematize.
The energy audit should, but it will need to be done in cold weather for any shrinkage to show.
There must have been something else wrong with your earlier roof for three roofers to advocate a total replacement to take care of a leak in a valley. The shingles may have been in bad shape, which would not surprise me since you mentioned earlier they were a label with a history of early failure.
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