Shed foundation question

[onthefence777]

So, I have a unique question pertaining to foundation for a shed because I would like to keep a small budget. Basically I have a slab that is about 6 feet shorter than I want my shed to be. So I was wondering if I could mix the two types of foundation? Meaning front half anchored to the existing slab, and the back half supported by piers with wood floor?

 

[Stuart in MN]

Where are you located? The answer probably depends on whether you get cold weather and where the frost line is at in your area. Secondly, is the existing slab just a flat slab, or does it have thickened edges (a frost slab)? There may be local regulations about what kind of slab is required for a shed, those regulations may depend on the shed's size. Also, what is the composition of the soil, is it sandy, clay or something else?

 

[onthefence777]

This is for at my pops place in central cali so no frost line issue I think. The slab is just a flat slab. And for a small shed like this no permit/inspection required here. Just gonna be a 6x10 or 6x12 for yard/garden tools and the push mower. As far as the soil not sure on type but it is pretty hard.

 

[Vegaman_Dan]

Bricks are your friend. Extend the foundation area out from the existing slab with bricks. For really stable footing, you can dig it out a few inches below the bricks, lay in some gravel or sand to put down a base for the bricks to lay on, but for a shed- depends on how much work you want to put into that.

 

[onthefence777]

Wow I never thought about bricks! In fact he has quite a few stacks already in the back yard I could use! And how would it work with the floor joists, just lay em across the top of the bricks? I'm not worried about doing some work to help him out to save money, so I could definately lay out some gravel underneath.

Edit: wait, do you mean red bricks or the concrete block things? And would I be able to leave it dug out underneath the shed because its already dug out 10 inches deep where I was gonna do piers, previous owner had a cheap liner pool there.

 

[bczygan]

First, post some photos and answer some questions.
How big is the existing slab. How much to add?
What is the soil and subsurface material. Clay? Sand?
How high is the slab above surrounding grade?
How does the grade run? Where does water run off?
What is your zoning?

If the existing slab is in good condition, the answer is probably that you add on to the existing slab and just build your wood frame walls with roof on that. Easy.

.

 

[kbs2244]

Permit or not, in some jurisdictions a solid, permanent roof equals a tax increase.
You may want to think about a heavy canvas awning type shelter.
Use the bricks to pave a floor area.