We did the new roof thing. Found very little indication of water. Fully insulated the crawl space, too. Odor still there. Full basement under the first floor, but it really isn't a musty/mildew odor. Most detectable in the areas closest to this particular carpeted area-don't really smell it in the bedrooms, for example. Yet don't smell it "in " the carpet, itself. Baffling and frustrating.