Construct The Best Shed Foundations

shed frame with foundation

The shed foundation you choose is a crucial step in having a safe and secure shed. The foundation system includes more than just what you set the shed on. Here are a few things you need to know to build the best foundation possible.

Location of Shed

The place you choose to place the shed will have a lot to do with the type of foundation you need to use. Uneven ground can cause you more problems with building a foundation. If the ground is not level, you may want to consider grading it to be easier for you. If you choose not to grade, you will have more work because the foundation needs to have an even surface. You may have to pour more concrete or adjust the skids you use, and the measurements can become skewed.

Drainage Concerns

No matter where you place your shed, you will want to make sure there is some system in place for adequate drainage. Not having a drainage system in place can ultimately cause your foundation to crack or fail all together. A drainage system doesn’t have to be fancy. It can be as simple as digging a few trenches downhill away from the shed. Whatever system you choose, it’s important to prevent waterlogging.

foundation area for shed with cross planks

Skid Foundations

If you are planning a temporary structure, you may want to use a skid foundation. These are great for renters or those who are planning on moving and taking the shed with you. If you decide a skid foundation is best for you, then prepare the area by laying down gravel where the foundation will go. You will want this to be about two inches deep and at least a foot wider than the shed. This way, when you lay down the skids and the shed, any water will not log the foundation or the floor of the shed in case of excess moisture.

Concrete solid blocks make a great base for a skid foundation. Make sure you are getting heavy-grade concrete blocks, and make sure you have enough of them to line along the foundation's base in rows. The more blocks you use, the more support you will have. An expert at your local hardware store can help you estimate the number of blocks you will need for your shed's size and weight. After the blocks are laid in rows, you can use straight 2X4’s to check to ensure they are level. You can then construct a frame that will extend beyond the concrete blocks by about a foot. The frame needs to support the weight of the shed, and most experts recommend using 4X6 timber for this project.

hands laying concrete slab for foundation or patio

Slab Foundations

These are designed to be permanent and will require more work. For this, you will need to dig a trench surround the shed area and use layers of metal in the trench for extra support. This also helps to prepare the area so you can avoid spilling over the perimeter.

You can then pour the concrete into sections in the area you are working with. If it’s a small area, you can pour the concrete into the entire frame you’ve set up. You can use a 2X4 to spread the pull of the concrete and even it out. Use finishing tools like a trowel and bull float to smooth it out.