If you're looking for high quality and personal service, you've come to the right place. At Clark Foundation Repair, we'll give you the attention and personal service you deserve. Some of the signs of foundation problems are cracks in the interior walls, separations between the concrete blocks in a block foundation or cracks and crumbling of a concrete foundation. Other signs are doors that will not close properly and bulging floors. This can be caused by not allowing the footing to cure sufficiently.