I have 2 floor leaks in a shed where snow melt comes in every spring. It has been going on for some time since the bottom plate is rotten. I believe the problem is that soil has built up over time and there is a big negative slope. The concrete on the front is only 6" high and isn't enough. The rest of the concrete on the side is staggered, maybe 2' high, then 4', then 7' at the back. How can I increase the height of the grade near the front? Secondly, is there a way to use a product such as liquid rubber or something else to block the water getting in? [ATTACH]79422[/ATTACH][ATTACH]79423[/ATTACH][ATTACH]79424[/ATTACH][ATTACH]79425[/ATTACH][ATTACH]79426[/ATTACH][ATTACH]79427[/ATTACH]

We had the ~ 20X20 sqft driveway poured in early Jan (north cali area). The concrete pour is about 4 inch deep with pattern stamped, cut was about 1 inch deep. Last week we found a thin but very long crack right in front of the doorstep. The crack doesn't appear along the cut lines but cut through the main floor. We didn't put any heavy weight stuff on this area or accidentally damaged ourselves so we are pretty sure it's probably how the concrete was poured or how the foundation was set up. Even though our contractor never promised the concrete won't crack but it's just 3 month since the project was completed and it already started cracking? We are pretty upset with this and are worried the crack will increase over time. It rained a little this morning, my heart sank when I saw the water made the crack looks really obvious now even with the stamped patterns! Does this look like a poorly done project to you? What can we do to reduce the damages to the minimum before it starts to get even worse? I've attached some pictures, hope you will be able to see them.[ATTACH]79540[/ATTACH][ATTACH]79541[/ATTACH][ATTACH]79542[/ATTACH]