Radon proof did a great job. With three separate slabs, and elevated radon levels above 30 pCi/l, my home was a challenge to say the least. So much so, that two other radon mitigation companies never followed up on their initial estimates. Trevor stopped by and came up with creative solutions that the prior contractors did not think of, and he was very reasonably priced. We tried a couple of less invasive solutions, and Radon Proof came out several times to tweak the set up until the levels eventually settled below 1.0 pCi/l. If you are in the North Alabama or Southern TN area, this is your radon company. Highly recommend!