Before you purchase any shed, it's important to make sure you follow the right steps in making sure that the ground is level. If your foundation is not level, your shed will eventually sink into the ground and more importantly, will waste your investment.
Consult your Local Building Inspector
First, consult your local building inspector to determine what type of foundation you will need. The decision will be based on the height and size of your storage shed. Regardless of the size of your shed, a building inspector needs to make sure that the storage shed is up to code for your local area.
Do I Need to Build a Foundation?
Generally, smaller sheds of up to 8'×6' do not need a foundation. Small sheds can be rested on gravel with either treated wood foundations or concrete foundation blocks. Large sheds will require strong foundations.
Tools/ Materials that you Will Need:
Most Common Type of Foundations Used:
Concrete slab foundations
1. Concrete Slab foundations:
We suggest to our customers to use a concrete slab for their shed foundations. Prior to the arrival of our professional builders, the build site must be properly leveled and should have natural drainage and no standing water. If your shed is placed on a site that has standing water, it will be susceptible to rot and decay!
Guidelines for Building Concrete Slabs:
Your concrete slab should be the same width as the storage shed.
The slab can be no greater than 1/4″ out of “square”.
In certain markets that experience frequent hurricanes, 1/2″ x 8″ “J” type anchor bolts should be set in the concrete around the entire perimeter of the slab (except for the doorway) projecting approximately 2 1/2″ above the slab grade and approximately 1 1/2″ in from the edge.
The finished slab surface needs to be at a minimum of 4″ above grade.
2. Wood Foundations:
Wood foundations are typically built using solid concrete leveling blocks which are 8” x 16” and no more than 2” high. Each block is arranged in evenly spaced rows by placing one in each corner and at each break. These concrete leveling blocks will support the floor frame. If you do not use concrete leveling blocks, we suggest using pressure treated lumber to support the wooden floor frame.
Heartland's suggested block count by size:
6X6 — 8
8X8 — 8
8X6 — 8
8X10 — 10
8X12 — 12
10X10 — 14
10X12 — 16
10X16 — 20
12X12 — 16
12X16 – 22
12X20 — 26
12X24 — 30
16X20 — 50 — *Piers or foundation may be required by state.
16X24 — 55 — *Piers or foundation may be required by state.
What's the Frost Line for your Area?
It’s important to consider the frost line of your area. If frost lines are ignored, your shed may move due to seasonal freeze and thaw changes. To avoid this problem, your foundation will need to be built to the frost line. Contact your local building inspector to determine the frost line for your area.
What Foundation is Right for Me?
While there are other methods to leveling the ground for shed foundations, these are the two types we suggest to our customers. Hopefully, the video will help make the process simple. However, if you have any questions, feel free to give us a call. We have a knowledgeable staff that can help you make sure your foundation is level for a long lasting storage solution.