I've been trying to figure out how rain is getting into my steel-walled building. The photos show the interior of the building (bottom plate). Could the rain wick/splash up under the wall panel? I already caulked the exterior of the building where the wall exterior meets the concrete. That did slow it down. If that is the issue, do I fill the rib 'gaps' in the wall panels with a caulk? thanks [i]Rain leaks on top of the bottom plate (from below) and under the bottom plate.[/i]

I had a contractor come out to provide an estimate on replacing soffit on a rental property. I had assumed icicles were forming due to a lack of airflow. The contractor took one look and said that the roof was at such a low pitch that it shouldn't have even been shingled. He said water was travelling back up under the edge of the shingles in places and causing the icicles. He pointed out where it was likely happening and I observed it happening later during a light rain. As I recall, 40 years ago the roof didn't have shingles but was tarred and had a layer of pebbles on it. The contractor suggested that the shingles be removed and a metal roof installed. Is there a tolerance for roof pitch when applying shingles? Is a metal roof really the preferred covering on low pitched roofs? thanks