In most circumstances, Kern Enterprize Inc. warrants all of its concrete against structural failure for a period of twelve months. It has been our experience that any substantial problems with concrete will develop within that time frame if at all. It is important to realize that this does not cover stress cracks that will inevitably develop in most concrete or damage done by ice melters of any kind. Should a warranty situation arise, Kern Enterprize Inc. will repair the concrete at no expense to the homeowner. Please know that we are in the business of having satisfied customers. If it is wrong we will make it right.