Based on the response to this post I would say I am sorry if I offended anyone. I have done some research on the concrete moisture problem and this is why we went to such extreme to prevent these problems. I believe if you follow the method using under slab French drain, crushed stone, a quality vapor barrier taped and sealed your slab will be free of serious moisture issues. I found a better method of waterproofing your concrete. It is called crystalline waterproofing. This technology turns the porous concrete into an impermeable barrier. The result is a structure with reduced cracking, self-sealing and waterproofing abilities which provides a powerful defiance against water damage and corrosion of reinforcing steel. Replaces unreliable exterior membrane systems, Penetrates deep into concrete, Self-seals hairline cracks, Reactivates in the presence of moisture years later, Effective against hydrostatic pressure, Waterproofs from any direction, Impervious to physical damage and deterioration, Easy to apply. Only thing I don't know the cost.