This will keep the sides of your shed cleaner and help them last longer. So, if your shed will be 10×12, your gravel foundation should be 12×14.Īllowing 12” on all sides of your shed, accomplishes a couple of things:įirst, it reduces rainwater dripping off the roof from splashing up against the sides of your shed. Generally speaking, your shed foundation should allow for at least 12” extra on each side of the building itself. Here are three more pitfalls to avoid when using gravel for you shed base… It will support the entire shed evenly, keep the bottom of your shed well drained, and discourage animals from nesting beneath your building. We have an entire article about the use of concrete blocks under sheds here.Īs an alternative to concrete blocks, a gravel foundation is one of the most economical and durable ways to prepare the ground for a shed.

Once they’re underneath the shed, they’re much more likely to cause damage to the structure from below.

In addition, sheds on blocks offer a perfect place for critters to burrow. Worse, the uneven strain on the shed’s frame can cause windows and doors to bind, preventing easy opening and closing. This can put unnecessary strain on the shed’s framing, causing it to show its age much faster.Įventually, you might end up with a shed that is listing to one side. Even if you are able to perfectly level all the blocks (which is difficult) when you first place your shed, as the years go by, the blocks will tend to settle at different rates. One of the biggest reasons to not use concrete blocks under a shed is the fact that the shed will not be supported evenly.

Undergrave instal