crack in floor slab under carpet

I live in a condo unit on the ground floor. The foundation is a concrete slab. I have never had actual pooled water in my unit, but the carpet smells musty and I have had some rust spots where a metal "foot" on a table was resting, so I know there is moisture in the carpeting. I do run a dehumidifier to help keep my unit drier, as when I shower, run the washing machine or dishwasher, my mirrors fog up in the living room, even if I run the bathroom fan. I peeled back the carpet to see if mold was growing underneath (no colored mold seen) and found a large crack in the cement. We did have an earthquake several years ago and I wonder if this happened then. In that same area, I sometimes notice an earthy smell, like a garden and I wonder if the crack extends down through the slab to the dirt below. I want to replace the carpet and have the crack(s) fixed, but don't know who to start with- a concrete contractor, or a flooring specialist. I would also like to have some sort of vapor barrier placed, but don't know if that is possible. If the slab is truly damaged (and the crack is not just superficial), I also believe that it may the the responsibility of the Home Owners association, as the slab is the foundation and I think would be considered in the same category as the roof- a common holding. Does anyone have any advice for me? thanks, Cheryl
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Chervah wrote:

contact the association and let them know of this so they can notify the insurance company and get things started...... if it is not damaged and causing the moisture they can tell of this also.... but if you dont mention this then nothing will be done... if you have damage probably some other units have damage also.... then they can check the other units and get it fixed before the damage increases....
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