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Dirt floor in old basement

I have an old house(1830)and the basement still has the old dirt floor from when the place was built. I want to concrete over the floor and use the space for storage. The walls are mortared stones and bricks-in good shape. What is the proper construction of a concrete slab? Is it heavy plastic sheeting, then sand, then gravel, then concrete? Can I just use sand instead of gravel? I will have to pump it into the basement space. Probably using Fibermesh concrete mix to make it strong.
Sound good?

Re: Dirt floor in old basement


Where is the house located? Is there any risk of flooding?

Timothy Miller
Re: Dirt floor in old basement

Howdy, hows the drainage? i ask as great time to install an internal perimeter drain if you need one...
So what type of soil? If you have lots of $ the consider gravel compacted & foam insulation a& 10 mill plastic and 4" of concrete be sure to install an expansion joint around the whole perimeter so you do not damage the stone foundation.

Re: Dirt floor in old basement

sand is not generally recommended under slabs. Timothy Millers advise sounds about right. I would place welded wire fabric in the slab. You might also test for radon and install a remediation system if needed.

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