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re: Can I pour my concrete patio floor directly over dirt?
Posted on 7/7/20 at 8:36 pm to The Nino
Posted on 7/7/20 at 8:36 pm to The Nino
It keeps ground moisture from coming up into the concrete. Also If there is too much moisture in the concrete flooring glues will not adhere properly. Same reason you put it under your house slab.
1
Posted on 7/8/20 at 10:21 am to Hank R Hill
Most slabs are poured over dirt with a couple inches of compacted sand to insure a uniform thickness throughout.
Typically the dirt is excavated a few inches below grade, then place sand, rake it even just a bit above grade then wet it so it compacts to grade.
Concrete over just dirt will have many hills and valleys.
Typically the dirt is excavated a few inches below grade, then place sand, rake it even just a bit above grade then wet it so it compacts to grade.
Concrete over just dirt will have many hills and valleys.
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