How to Make a Shed Base

When building a shed, the foundation is one of the most important steps to get right. A solid base ensures the shed stays level, secure, and free from issues like water damage or structural instability.

This guide will walk you through how to make a shed base, covering the different types of bases, why they're necessary, and the tools and materials you'll need.

We'll also explain the step-by-step process of building a base, offer tips for getting it right, and help you choose the perfect location for your shed. Whether it's a concrete, timber, or plastic base, a strong foundation will keep your shed standing for years to come.

• Types of Shed Base
• Why Do You Need a Shed Base?
• How to Make a Shed Base
• Tips for Building Your Shed Base
• How to Choose a Location for Your Shed

Types of Shed Base

When deciding how to make a shed base, you'll find several options depending on your needs, budget, and the type of shed you're building. Let's break down the most common types of shed bases, based on our experience and research:

Concrete Base

Concrete is the go-to choice for those who want maximum durability and strength. It's perfect for larger, heavier sheds or if you're storing bulky equipment. A concrete base provides excellent stability, meaning your shed will stay level and secure for years, no matter the weather.

However, it does require a bit more effort and time to install. You'll need to excavate the area, build a frame, and pour the concrete, which takes a couple of days to fully set. But the results are worth it.

According to our research, concrete is the best option for those looking for a long-lasting, maintenance-free foundation that can support substantial weight.

Paving Slab Base

For a simpler, more DIY-friendly option, paving slabs are a great choice. They're much easier to lay compared to concrete, making them a good option for small to medium-sized sheds.

You don't need to mix or pour anything—just level the ground, place the slabs, and you're good to go. Paving slabs are durable, offering solid support while also allowing for some flexibility in positioning.

After putting this method to the test, we've found it ideal for sheds that don't require the same heavy-duty support as a concrete base. The added bonus? You can easily replace individual slabs if needed.

Timber Bearer Base

If you're wondering how to make a shed base without concrete, then a timber bearer base is an excellent option if your ground isn't perfectly level or if you're building on slightly uneven terrain.

This method involves laying pressure-treated timber beams (or bearers) in a grid pattern, which raises the shed off the ground and ensures good airflow beneath. This is especially useful for lightweight sheds, as it prevents moisture buildup and extends the life of your shed's floor.

Based on our experience, timber bearers are quick to install and cost-effective, making them a top choice for DIY enthusiasts who want a natural, flexible base that's still sturdy enough for smaller sheds.

Plastic Base

Plastic bases are becoming increasingly popular, and for good reason. They're incredibly easy to install—no heavy lifting or digging is required. Simply lay down the interlocking plastic grids and fill them with gravel.

These bases are lightweight, eco-friendly (usually made from recycled materials), and offer excellent drainage. We've found plastic bases to be perfect for smaller sheds, especially if you're looking for a quick, hassle-free solution.

They're also easy to reposition or expand if needed. While they might not offer the same level of support as concrete or timber for heavier sheds, they're a solid choice for most garden sheds and small structures.

Why Do You Need a Shed Base?

The short answer is that a proper base keeps your shed level, stable, and dry. By putting a shed on grass or dirt without a solid foundation, you risk several issues, from water pooling and causing rot to doors becoming misaligned.

According to our research, a base prevents the ground from shifting, ensures proper drainage, and keeps the shed in good shape for years.

How to Make a Shed Base

Tools & Materials

Here's a list of what you'll need to build the base for your custom shed:

• Spirit level
• Measuring tape
• Pegs and string
• Shovel
• Hardcore (gravel or crushed stone)
• Sand
• Cement (for concrete or slab base)
• Timber boards (for formwork or a timber base)
• Rubber mallet
• Compactor (optional)

Step 1: Prepare The Ground

The first step in building a shed base is to prepare the ground. Start by clearing the area of any vegetation, rocks, or debris that might get in the way. It's important to have a clean, level space to work with.

Once the area is clear, you'll need to mark out the dimensions of your shed base. This can be done easily with pegs and string to create a rectangle or square where the shed will sit. Be sure to measure carefully so the base matches the exact size of your shed.

If you're building a concrete base, you'll need to excavate the ground to about 6 inches deep. For lighter bases like paving slabs or timber bearers, you won't need to dig as deeply.

Step 2: Level The Ground

Once the area is marked and excavated, it's time to level the ground. A flat surface is critical to prevent future issues with uneven settling or water pooling. Using a rake, spread the soil evenly across the entire area.

After that, use a spirit level to check for any high or low spots. This step might take a bit of time, but it's well worth the effort to ensure your base will sit properly. If the ground isn't perfectly level, your shed could shift or tilt over time, causing doors and windows to misalign.

If you're using concrete blocks, be sure to check out our guide on how to level a shed with concrete blocks.

Step 3: Add Hardcore Layer

Now that the ground is level, it's time to add a layer of hardcore. Hardcore consists of crushed stone, gravel, or crushed concrete, which helps create a firm foundation for your base. Spread about 3 inches of hardcore evenly across the area.

This layer not only strengthens the foundation but also aids in drainage, preventing water from collecting under your shed. After laying the hardcore, it's crucial to compact it.

You can use a hand tamper or, if you prefer a quicker and more thorough job, a mechanical compactor. This step will give your base the solid foundation it needs to support the weight of your shed.

Step 4: Build The Formwork (For Concrete Or Slab)

If you're installing a concrete or paving slab base, you'll need to create formwork to hold everything in place while it sets. Formwork is essentially a wooden frame that outlines your base and contains the concrete or slabs.

Use treated timber boards to build the frame, making sure the inside dimensions match the size of your shed. For best results, check that the frame is perfectly square by measuring diagonally from corner to corner.

Both diagonal measurements should be equal. This ensures that your base will be accurate and stable. If you're laying paving slabs, this formwork will help keep everything aligned while you work.

Step 5: Lay The Base

Now comes the part where things start coming together. For a concrete base, mix the concrete according to the manufacturer's instructions, and pour it evenly into the formwork.

Use a screed (a long, straight board) to level the surface, making sure the concrete is evenly distributed and smooth. Don't rush this part—it's important to take your time to ensure the surface is flat and level.

For a paving slab base, you'll need to first spread a mix of sand and cement on the hardcore layer. Then, lay the slabs one by one, tapping them into place with a rubber mallet. Check each slab with a spirit level to ensure they're sitting evenly.

Step 6: Allow To Set

Once your base is laid, you'll need to give it some time to settle. For a concrete base, let it cure for at least 48 hours before proceeding with the shed assembly.

During this time, cover the concrete with plastic sheets to protect it from rain or excessive sun, which can affect the drying process. For slab bases, make sure all the gaps between the slabs are filled with sand.

This helps lock everything in place and prevents movement. Whether you're working with concrete or slabs, it's essential not to rush this step. Letting the base set properly ensures it will be strong enough to support your shed for many years to come.

Tips For Building Your Shed Base

1. Use A Spirit Level: Always double-check that everything is level—this will save you from headaches later.
2. Don't Skip Ground Preparation: Properly clearing and leveling the ground ensures a stable base.
3. Consider Drainage: Ensure water can flow away from the shed by slightly sloping the base or using gravel.
4. Use Treated Materials: If you opt for timber, make sure it's treated to prevent rot.
5. Measure Twice, Cut Once: Double-check all your measurements to avoid mistakes.

When measuring for your base, be sure you have the answers to questions such as should a shed base be bigger than shed beforehand.

How to Choose a Location for Your Shed

Choosing the right location for your shed is just as important as how to lay a foundation for a shed. A well-chosen spot can make maintenance easier, extend the life of your shed, and even improve the look and functionality of your garden.

Let's go through some essential steps to help you find the perfect spot:

Assess Your Space

Start by evaluating the available space in your garden. Look for an area with easy access from your home or garage. You'll need enough room to move tools, equipment, and other items in and out of the shed comfortably.

Make sure there are no overhanging trees, bushes, or structures like fences that could obstruct the shed or cause potential damage. Leaves and branches falling on the roof can lead to long-term wear and tear.

Plus, you'll want to have space around the shed for any future maintenance, like repainting or cleaning, so leave a gap of at least a few feet around all sides.

Check The Ground Conditions

Ground conditions are crucial to the stability of your shed. Avoid areas that are prone to flooding or waterlogging, as excess moisture can weaken the foundation and cause problems like rot, mold, or uneven settling.

Look for a well-drained, level area. If the natural ground isn't ideal, you might need to make some adjustments—like adding drainage or leveling the space before building the base.

This will prevent future issues and ensure your shed remains stable. If you're in doubt, keep in mind that higher ground is generally better.

Consider Sunlight And View

If your shed will be used as more than just a storage space—like a workshop, potting shed, or summerhouse—consider where it gets the best natural light. Placing your shed in a spot that receives plenty of sunlight can make it a more pleasant place to spend time.

Additionally, think about what you'll be looking at when you're inside the shed. If possible, position it so you have a nice view of your garden or yard. Natural light and a good view can make a big difference if you're spending a lot of time in there.

Conclusion

Building a solid shed base is the key to ensuring your shed remains stable, level, and protected from the elements. Whether you opt for a concrete, paving slab, timber, or plastic base, it's important to choose the right type for your shed's size and needs.

By following the proper steps, you can avoid future issues like water damage or uneven settling. Additionally, selecting the right location with good access, proper drainage, and enough sunlight can make all the difference in both the longevity and enjoyment of your shed.

Ready to start your shed project? Visit Homestead Supplier for high-quality shed kits and everything you need to make your shed-building experience a success.

If you want to learn more, why not check out these articles below:

• How to Build a Cinder Block Foundation for a Shed
• Is a Shed a Permanent Structure
• Where to Put Shed in Backyard
• How to Organize My Shed
• How Far Does a Shed Have to Be From the Fence?
• How to Make a Shed Look Nice
• How to Keep Things Dry in a Shed
• What Size Shed for Riding Lawn Mower?
• How to Get Shed in Backyard with Fence
• How to Store Bikes in a Shed
• What Is a Lean to Shed?
• What Is a Potting Shed?
• How Much Is a Storage Shed?
• Best Lawn Mower Storage Shed
• How to Jack Up a Shed