Hello, Recently after a heavy rainfall a couple of weeks ago, I have noticed that there is water coming in from the bottom of the wall. It is only on one wall / corner and in one area of that room in the basement. It is a dark brown color in one spot as well. I know previously the owner that was here before had a oil heating tank in this room and it was eventually moved outsize. I attributed this dark brown color to coming up through the cement in that room from a possible oil tank leakage before it was moved outside. No matter what you do, you wipe it up and the dark brown residue comes right back up. Also, when I wipe up the water with paper towels, I put some more along the bottom of the wall to find out where it is coming from but it seems to be coming from more then one spot on the wall. Within about 2 hours the paper towels are all damp / wet again. There is no plumbing in this room neither in the room above it so I know it is not a pipe issue. The wall where the problem has arose is an exterior wall but on the other side of it is a 2 car unfinished garage with poured concrete. I have visually inspected the wall and floor in the garage and can see no cracks or dampness in that same area. I have also inspected outside and the gutters are properly drained away from the house. I have attached pictures if anyone has any ideas of what this problem could be, or any help with the situation - I would greatly appreciate the help.

I am putting a roof on a shed, roof is approx 12x14. I can understand the reason for putting a starter course on three tab shingles (to help channel the water away). But why is it, or how is it, I need a starter course on the architectural shingles I bought (dragon tooth style). The GAF shingles I bought mention a starter course, so does the GAF website/installation video. But the starter course isn't even shingles, its a starter strip, which I guess gives the shingles adhesive strength around the perimeter? Also, I know how to make ridge caps with the three tab shingles. What am I going to do for these architectural shingles? Thanks!