With ground screws you can quickly build a solid foundation for, for example, a wooden post, pergola, garden shed, deck, or playground equipment. You simply drive the ground screw into the ground manually with the corresponding installation tool, after which you can immediately start building. Pouring concrete or digging a deep hole is no longer necessary, saving you a lot of time and money. You can compose your own ideal ground screw, adapted to the structure you are going to build. We offer several top pieces, including a U-bracket, deck top, hexagonal top, and post holder. Planning on building a heavy structure? Add an extension piece to your order, so you can bury the ground screw deeper. This will increase the load-bearing capacity. We explain more about this further on.

Advantages of ground screws

In addition to a relatively fast and easy installation, ground screws have a host of other advantages. A few examples:

• Installation without digging
• Can also be installed in the winter
• Very short installation time
• Maintenance-free
• No concrete required (which means not having to wait for it to dry)
• No heavy machinery required
• Start building immediately after installation
• Suitable for permanent and temporary structures
• Large lifespan
• Reusable without damaging its environment

On top of that, you can select the top piece you want and decide whether you need an extension. Prefer a different kind of post holder after all? Wovar offers a wide range of post holders, including post bases, pointed post anchors, and U and H-anchors.

Build your own foundation

It has never been this easy to build your own foundation. This galvanised steel ground screw is equipped with a coarse screw thread and is easy to drive into the ground. Are you planning to use ground screws to anchor a post, deck, shed, or pergola? We made you a step-by-step guide below.

1. First, determine what exactly you want to build and calculate the weight. The total weight that the ground screws will have to carry is essential information, as this determines the required depth of the ground screws. Further on, we will explain more about the load-bearing capacity of the ground screws.
2. When you know the weight and size of the structure, you can determine the depth and number of ground screws you will need. This is also when you establish whether you will need extensions for the ground screws. We offer extensions of 330 and 580 mm long. Pay attention to the actual added length, as this is not the same as the total length.
3. Determine the position of the ground screws. To make it even easier to drive them into the ground, you can make small holes with a pointed object, such as a piece of wood. Push the ground screw into the hole, and turn it with the installation tool to drive it into the ground. Make sure the foundation is straight by using a spirit level.
4. Mount the desired top piece on the ground screw with the supplied fasteners. Note: for the U-bracket and post holder, you will have to add an adaptor first. Your foundation is now ready for you to start building your deck, shed, or pergola.

The extensions, top pieces, and adaptor all come with the necessary fasteners. With the M10 bolts, you can quickly fasten all the different pieces. Note: you do still have to add fasteners to secure the post to the ground screw. You can find these fasteners in the categories coach screws and wafer head screws. 

Load-bearing capacity ground screws

In the graph below, you can see the load-bearing capacity of a foundation with ground screws in clay ground. The numbers are an approximation. For sand, the load-bearing capacity is slightly higher, but we recommend not going beyond the weights mentioned in the graph. The deeper the ground screws, the higher the load-bearing capacity.

(The values in the mentioned load-bearing capacity are lowered with a safety factor of 35%. Wovar is not liable for damages due to an erroneous choice of ground screws.)

Which foundation do I need?

Wovar's ground screws consist of several parts. To make it as easy as possible to find the correct pieces for your project, we made an overview where you will find which parts you will need for which top piece.

Top piece - Required parts

U-bracket 1. Ground screw 2. (optional) Extension 3. Adaptor 4. U-bracket

Post holder 1. Ground screw 2. (optional) Extension 3. Adaptor 4. Post holder

Hex top 1. Ground screw 2. (optional) Extension 3. Hex top

Deck top 1. Ground screw 2. (optional) Extension 3. Deck top

Deck foundation

When you are going to build a foundation for a deck with ground screws, it is important to position the ground screw relatively close to each other. For a strong foundation for your decking, we recommend installing a ground screw every 50 cm in length. For example, when you are building a 2 m long deck, you will need 5 ground screws per side. Depending on the depth of the deck, you can add ground screws in the middle of the deck to provide additional support.

Buy ground screws

Order ground screws today and start building your own solid foundation. This is a feasible job for every DIY-er and will not cost you much time. Remember to add the installation tool to drive the ground screws straight into the ground.

Because you are likely to need various ground screws for your foundation, we offer a volume discount when you order multiple ground screws at the same time. Business clients enjoy even more advantages with a free business account, such as a set business discount and access to a detailed order history.

Prefer a different kind of post holder after all? Wovar offers a wide range of post holders, including post bases, pointed post anchors, and U and H-anchors.