Thanks for the reply opnspaces. There isn't much of a center seam that can be sealed. Although you can see the center of the roof frame if that makes sense. The more I think about it, I am suspecting that the metal strip on the exterior at the edge of the roof line on the front (that runs along the width, not length) needs to be sealed. We had a sideways rain during a storm the other day and I am thinking that is how water got under the roof's edge on the canvas. However, I am thinking the dampness on the bottom of the plywood on the inside (again running along the width of the roof) is from the metal strip needing to be sealed.
Thanks again for replying!
