Built my home 5 years ago and the garage floor was poorly done. Has some uneven spots that pools water off of wet vehicles and it slowly drains toward the house instead of out the garage door. Keeps things a little mildewy near the wall. What is a good solition?
On top of the problem with the slope, you are in a high humidity state-Alabama. I'm next door. One thing I would try before spending big monies for a build-up (the 2") or having drainage slits cut in: Do you have or can borrow a de-humidifier? Place a de-humidifier in the garage and let it run. Most of the better de-humidifiers come with a way to attach a garden hose for drainage so that you don't have to remember to drain the tank all the time. This will only work if you have a way to run the garden hose out of the garage and away from the house. Placing the unit on something a foot or two from floor level will help with the drainage also. I have a de-humidifier I use in my home during the summer months due to humidity here. I made a way to attach a 3/8" drain tube which is connected to a line through the floor, under the house, and into the main waste drain. Just one thought, David