Jun 16, 2013, 05:08 PMlotsoquestions
Shed foundation in very wet soil
And I do mean really wet. I can drive a 1/2 inch piece of rebar a good 30 inches into the soil by just pushing on it.
I back filled and built a shed in the location years ago. Unfortunately I did not back fill quite enough and when the rains come the shed floods. I've decided to tear down and start over.
I'm considering constructing a frame from treated 4x6's and that will raise the surface up a good foot or so. I'm thinking of filling the frame with crushed limestone and then building the shed atop the stone. One reason I think this may be the way to go is there will be nowhere for animals to live beneath the shed. If I were to pour concrete pads and build the structure on posts there would be a large gap that would give animals plenty of room to move in beneath.
I believe this plan should work, but if anyone has any experience, or theories, to the contrary I'd be interested to hear.
Jun 16, 2013, 08:04 PMJaybee
I am going back and forth on what to say about this one. On one hand, thinking of soft, wet soil I want to advise that you dig down to solid earth to make a solid foundation.
Then, the little contractor on my other shoulder says, "It's just a shed, lighten up will ya".
So it's a matter of spreading the load so that it doesn't sink into the soft soil. What about a shed-sized slab, then raise it up on piers to get above flooding and then make a solid skirt to keep the critters out?
The other way would be to do a mono-pour raised slab that will do double duty as both footers and flooring, but this will be more expensive.
For a different approach, is there any way to install drainage that will let this area dry out?