If you can't see any telltale stream marks, and since the stain is quite little, look at the underside from the roof for 'shiners.' A shiner is really a nail that missed the framing member, In such cases once the carpenter nailed the roof sheathing to your rafters. Dampness that https://edwingntyc.plpwiki.com/5449524/the_brooks_roofing_erie_diaries