:!: thanks for all the advice I will use it, the outside wall are at ground level in the back and one side. we stuccoed then put tar on the stucco and plastic over the tar. I have not done anything to the floor or inside. the building is and floor is not 2 mo. old. the floor is a little dirty. If I pressure wash and let it dry that should be ok don,t you think. also we put plastic down before pouring the concrete. :arrow: thanks rob