Sill Plate Sealing Lantern

Why the Gap Between Foundation and Wall Matters Every home has a sill plate. It is the horizontal piece of lumber that sits directly on top of the foundation, bridging the gap between the concrete and the framed wall above. In many older houses in Cleveland, TN, that gap is anything but tight. Over decades, wood shrinks, foundation settles, and weather exposure takes its toll. The result is a narrow but consistent gap that runs the entire perimeter of the house. For mice,