I'm about to build a large shed in my backyard that will function as a workshop as well. It will be approximately 14'x20'.
Here's my issue. The area I want to build it in is in the back corner of my yard and has some very large trees around it which have roots within a few inches of the surface. I originally wanted to pour a concrete slab and build the shed on that. However, with the roots, I'm afraid I won't be able to dig down deep enough for a thick enough pad.
Alternatively, I was thinking instead of building the base of the shed like a deck, by pouring several concrete pads/footings, using floor joists, and a plywood floor. The problem with this system is that it will raise the height of the shed by at least 12-14", accounting for the 2x8 joists and other hardware underneath the floor. I'm really hesitant to do this because I wanted the entrance to be within a few inches of ground level, and I don't want the structure to look too imposing.
Here then are my questions:
- What would you think is a better base for a shed/workshop that will have stationary tools like a table saw?
- I know the wood is more comfortable to stand on for long periods of time, but what would be better in the winter? Would the wood floor be colder because the cold air would circulate under the shed?
- If I was to pour a concrete pad, how thick should it be?
- If, let's say, the pad should be 8", can I pour it so that the pad is actually above ground, then gradually slope up 8" of earth around it.
- General thoughts/insights, past experiences?
I would be so grateful for any advice that can be offered. I want to get started by the first week of September, and need to finalize my course of action.
I know woodworking very well, but am a complet novice when it comes to concrete.
Thanks in advance.