Can a Shed Sit on Grass -We Ask the Experts

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Have you been thinking about getting a garden shed? Maybe you are looking for adiquate storage space for your garding equiptment, Lets face it, no one wants their yard tools in the house. The problem is, where in your yard to put a shed.

If a shed is placed directly on grass, is it subject to damaging weather conditions or structural damage over time?

Can you even sit a shed directly on the grass? Grass is not a suitable base for your shed. Placing a shed directly on grass may lead to rot and structural damage. The damp conditions under the shed will warp and distort your shed over time. Wooden, plastic, and metal sheds should not sit on the grass or they may invalidate your warranty.

Many people who are building a shed for the first time may suggest a gravel or stone base, which will work for most small sheds. The bigger the shed is, though, the more difficult it will be to protect it from harsh weather conditions and rot. Extend the lifetime of your shed by investing in a proper shed base constructed of a concrete slab or a post and beam foundation, especially if your shed is bigger than the standard model.

See the data we collected below from different shed brands about placing your shed on the grass, as well as our comprehensive base guide below to find out the different types of shed foundations and which shed foundation will be right for you.

What about Wood, plastic/resin and metal sheds, can they sit on grass – Let’s ask the experts

In nearly all cases, placing your shed on some sort of raised platform with proper drainage will better protect it and increase its lifespan. Unless you have a large shed, you don’t need to go digging up your backyard and pouring concrete, there are other, much more affordable, and suitable options available.

But, don’t take my word for it, lets ask some experts!

To get a better answer, I thought it would be wise to speak with some of the most popular shed brands out on the market today and see what their requirements are on placing a shed directly on grass.

in summery, this is what they said:

#Scroll to the right
MaterialBrandsit on grassSit on a base/
Foundation
Plastic RubbermaidNoYes
PlasticSuncastNoYes
PlasticLifetimeNoYes
PlasticPalramNoYes
WoodTuff ShedNo
(already
have a base and floor)
Yes
WoodHandy HomeNo
(already
have a base and floor)
Yes
Woodforest gardenNoYes
MetalArrowCan but not
recommended
Yes
MetalOutsunnyYesYes
MetalBosmereYesYes
MetalHanoverNoYes
What different brands say about their sheds being put directly on grass

As you can see, all the brands we asked, said they recommend placing your shed on either a concrete foundation or a wooden base. Even the ones who suggested placing the shed directly on grass all continued by saying a base or foundation would be the best option in protecting the shed.

Another recommendation, one that is often overlooked is the overhang of a shed, find out more about does a shed roof need an overhang here

It’s easy to understand the argument for wood not being allowed to directly sit on the grass. Even if the wood has been treated to prevent rot and damage it will surrcome to the environment in only a few years.

Wet and frost from the ground will slowly start to rot the wooden beams while the whole structure will start to warp as the ground swells and changes altering the structural integrity of the shed to the point where even opening the door will become a chore.

Plastic and metal sheds will also suffer a similar fate.

Metal sheds will start to rust straight away, even if the metal is treated it will show signs. Eventually, the whole bottom floor of the shed will be badly rusted out.

Plastic will probably last a little longer than wooden or metal sheds as they wont rot or rust but they can’t stop the ground from swelling and changing. The weight of the shed, like with a wooden and metal sheds will also warp over time and will slowly start to sink into the ground. This may take a few months to even years but it will happen and it will permanently damage your shed.

If you just place your shed directly on grass eventually the material will deteriorate, the shed will warp and twist out of shape and it will sink into the ground in only a few years. Some sheds have a 10, 30, or 50-year warranty against damage but placing it directly on grass would be a death sentence and would likely invalidate your warranty.

By simply investing in a foundation or base that will raise the shed out of the damp conditions, will help keep the shed in a good state for years to come. Even something as simple as placing a few paving slabs on the grass will help a lot.

What Type of Foundation Is Best for Your Shed

Even if your shed is built on loose gravel or dirt, it will not be ready for a lifetime of ground moisture that may occur every time it rains. Excessive moisture on your shed’s foundation will cause premature decay and rot, so you will want to make sure to get the best foundation for your shed.

Picking the right foundation can be tricky, as it may depend on your shed’s size, location in your yard, and the building permits required for certain foundations. Explore the best shed foundations in our comprehensive table gallery below:

Foundation / Base
Added info
Concrete Slab or Concrete PaversBest Option for Most Sheds, Solid Foundation Protected from Excessive Moisture, Easy to Install, Inexpensive Base Foundation Option
Skid FoundationEasy to Install with Fast Results, Impermanent Design for Easy Transportation, Close to Ground Surface, Great for Sheds of All Shapes and Size
Plastic Paver SystemInnovative Design, Great for Battling Excessive Moisture, Great for Sheds of All Shapes and Sizes, Easily Transportable, Easy and Fast Installation Proces
Lumbar Frame with Metal BracingGreat Protection Against Moisture, Provides Level Base, Lifts Base from Harmful Moisture, Provides Ventilation Under Shed, Long-Lasting Brace Option with Increased Performance
Adjustable Screw PilesSuitable for Any Soil Condition, Great for Frost Protection, Works with Any Size Shed, Quick Installation, Slightly More Difficult to Execute for Novice Shed Owners
Concrete Piers and Beam FoundationConcrete Piers and Beam Foundation
Offers Best Protection, Extends Life of Shed By Decades, Great Permanent Structure Option, Difficult to Construct, Best for Large or Industrial Sized Sheds

There are many available options to explore, so do some research and find the option that suits you best. You can explore which one of these options is best suited for your needs below.

Which Foundation Type Should You Use for Your Shed

With so many different foundation bases to choose from, it may be difficult to decide which foundation type will be best for your shed. You can find a more detailed description of each foundation type below.

  • Concrete Slab or Concrete Pavers – Concrete is an incredible tool that you can use to provide a solid foundation for your shed. Pavers are easy to install and require minimal planning and expenses. A solid concrete foundation requires a little more planning, but it will provide a moisture-proof seal for your shed’s floor. Concrete slabs and pavers still may encounter structural damage from stubborn roots or tectonic shifting. Alternatively, you can use concrete deck blocks to provide a raised lumber platform for your shed to sit on, protected from the moisture of the soil.
  • Skid Foundation – A skid foundation is an inexpensive and practical way to support your shed and protect it from damp conditions that will cause your shed’s floor to rot. A skid foundation uses pressure treated 4×4 wooden lumber or skids. Larger sheds will make use of 4×6 or 6×6 skids, this will not only protect your shed by raising it off the ground but will make your shed easily transportable so you can save time when moving to a different geographical location. Skid foundations are still prone to sinking, though, and a more permanent structure is suggested for the best results.
  • Plastic Paver System – This is a great way to restructure a garden or make the use of extra gravel you may have. Plastic paver systems have all the benefits of a skid foundation, but better. A plastic paver base with loose gravel will encourage the best drainage and ensure that no excess moisture will rot the wooden structure of your shed.
  • Lumbar Frame with Metal Bracing – This is just one step up from a lumbar base with concrete deck blocks, as you are able to provide a lifted level surface that will be protected from excess moisture. Metal bracing will be able to stand up against the test of time and provide a more adaptable structure that protects the floor of your shed from harsh weather conditions. The metal bracings are mostly used in addition to a concrete slab, so this is a good way to upgrade your current foundation system.
  • Adjustable Screw Piles – This system is a lot similar to the metal bracing structure but offers a little more adaptability as far as length goes. Each one of these screw piles has adjustable lengths, so this will be best used for a shed that has an unlevel ground surface.
  • Concrete Pillars and Beam Foundation – This system is best used for large or industrial type sheds, and it provides the most protection against the elements. Your shed foundation will be frost proof and lifted at a higher level to combat moisture and promote proper drainage. This is the most complex system, and you might need the help of professionals to properly incorporate this model.

What Is an improper Proper Shed Foundation

Though it may seem that a shed will hold up directly on the ground to novice yard strategists, an experienced shed owner will know the dangers of an improper foundation. Building a shed directly on the ground is not a good way to ensure your shed’s health for many reasons. Take a look at a few issues you may encounter if you decide to build your shed with no foundation on the grass.

  • Improper Surface Level – One of the most important things to consider when building a shed is providing a level floor surface to maintain the function of your doors. Geographical locations under sea level may be prone to sinkholes, so you want to make sure that you raise your shed at a proper level to maintain functional entryways.
  • Improper Moisture Levels – When your shed’s wood is introduced to a damp surface such as grass for an extended period of time, it will absorb the excess moisture and rot a lot faster than normal. Maintain your shed properly with a solid foundation to prevent your wood from premature decay.
  • Improper Water Drainage – Another powerful weather component that affects rot and decay is water drainage. With no foundation, a wooden floor will have to succumb to an excess amount of moisture when it rains. Too much frequent moisture caused by improper drainage can lead to rot and decrease the longevity of your shed’s life.
  • Improper Ventilation – If your shed is placed directly onto the grass, it may be subject to improper ventilation. Improper ventilation can lead to toxic chemicals that will invade your workstation and cling to your personal belongings. Proper ventilation underneath your shed will provide the best airflow and prevent mildew or rot on your shed’s foundation.
  • Unstable Base – If you have a medium or large shed and try to cut corners by investing in the cheapest base possible, you may be causing more harm than good. A shed that has a lawn, gravel, or dirt base will be unstable and your shed may warp, rot, or have irreparable structural damage.

As you can tell, there are many ways that an improper foundation can impair the overall health of your shed and shorten the length of its usage.

The bigger your shed is, the more likely you will need expensive permits and professional construction to make it secure and ready for extended usage. Finding the right base for your shed is pertinent to its survival, and there are many inexpensive base options out there.

Final Thoughts

Now you are one step closer to constructing a solid base for your shed. It may seem like the easiest route to just put your shed directly in your yard, but the excess moisture of the grass and improper drainage will eventually lead your shed to rot. Take care of your personal belongings and workspace by providing a stable base.

Finding the right shed foundation will enhance the longevity of your shed’s life by decades. Do not risk the safety of your shed. Instead, invest in a shed base that will last a lifetime.

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