laying a concrete floor in 100yo house
I have a 120yo house with an unfinished basement, dirt floor/stone walls etc. The floor is dirt mixed with stone that they used when they built the house. There is no drain and it is relatively dry. I want to have a floor poured but I've heard 2 ways
1 : to use a laser to level and just pour concrete 3-4 inches.
2 : to excavate the floor down 6 inches or so, then a layer of gravel- followed by waterproof barrier - then steele grid followed by concrete 4inches.
Can I get away with the first option? Should I worry about moisture problems and cracking with the first option?
thank you for any info.