Geodesic dome for guest accommodation on a raised platform in a park, carried by T-Block ground screws visible under the edge.

Home, garden & DIY

For homeowners who want to make more of their outdoor space. No concrete, removable works, and a DIY installation in a few hours.

Removable

often a simpler procedure*

DIY

easy to install

Hours

to install, not weeks

* How the works are classified for planning purposes depends on the project and on local regulations: always check with your local authority or your designer.

DIY projects for your home

The timber base of a garden shed being fixed onto the frame anchored to T-Block ground screws.

Garden sheds

Garden rooms in timber or glass on removable foundations, with no concrete pour. Foundations in 4-6 hours, assembly over a weekend. Ground screws for garden sheds.

Tip: use T-Block^® T4/T5, 6-9 screws

Finished timber deck in a garden, raised off the ground on T-Block ground screws, with no screed underneath.

Decks and terraces

Timber or composite platforms raised off the ground. Well suited to uneven and sloping gardens.

Tip: T-Block^® T3/T4 on a close grid, one point every 1.5-2 m

Timber pergola in a hillside garden, its posts anchored to the ground with T-Block ground screws.

Pergolas and gazebos

Light but sturdy structures for the patio and the garden. Shade where you need it, with no masonry. How to anchor a gazebo to the ground.

Tip: T-Block^® T4, 4-9 screws depending on the size

Carport on a paved courtyard, with posts anchored by T-Block ground screws, no concrete footings.

Carports and shelters

Cover for the car or the firewood without taking up ground. Light structures, easy to put up. Go to the Carports and canopies page.

Tip: T-Block^® T5, one under each post

Fences

Fence posts with no hole and no concrete. Straight, adjustable and easy to replace. How to build a fence without concrete.

Tip: headless T-Block^® T3 (for a round post or a T-post) for the line posts; for braces, diagonals and intermediate supports you can use T1/T3 with M10/M12 eye bolts fixed in the horizontal hole.

Metal frame of a polytunnel greenhouse resting on T-Block ground screws, on undug ground.

Greenhouses and vegetable gardens

Foundations for greenhouses and growing structures. Precise levelling, no digging.

Tip: T-Block^® T4 with a flange or eye bolt under the corners

DIY installation guide

4 simple steps

The cross base of a parasol laid on the lawn with the four screws beside it: it works as a template to mark where they will go.

Mark out

Mark the installation points with chalk. Use a spirit level to check the ground.

The four T-Block ground screws driven into the lawn at the marked points, with the cross base laid alongside.

Drive in the screws

Set the screw on the mark and turn it in by hand with a socket and T-handle (up to the T6 series). The T7 requires a high-torque driver.

A spirit level resting on the arm of the base, between the heads of the screws already installed, to check it is level.

Level and adjust

Once the screws are in, adjust the height by turning the levelling wrench. Check with a spirit level along each side.

The cross base and the parasol pole mounted on the heads of the T-Block ground anchors, on the lawn in front of the farmhouse.

Fix the structure

Fix the posts of the structure onto the screw heads. Your foundations are ready to build on.

The four steps of a real installation, photographed in a single afternoon: the base of a garden parasol on four screws, with no ballast and no concrete.

What you need

Basic tools

✓ Socket and T-handle (by hand up to T6)
✓ Spirit level
✓ Tape measure
✓ Marking chalk

Suggested team

✓ Garden shed: 2-3 people
✓ Deck: 2 people
✓ Pergola: 1-2 people

Dozens of T-Block ground screws already installed in a wooded lawn, set out on a regular grid between the trunks: no digging and no roots cut. — A platform for a geodesic dome in a wooded park: first the screws, driven in between the trunks without digging; then the beams, resting on the heads. The ground underneath stays as it was.

Close-up of a timber platform beam resting on and bolted to the head of a T-Block ground screw, with soil and leaves untouched all around. — A platform for a geodesic dome in a wooded park: first the screws, driven in between the trunks without digging; then the beams, resting on the heads. The ground underneath stays as it was.

Why ground screws suit DIY

Removable works

No permanent masonry in the ground: the permit process is often simpler.* Always check with your local authority.

Easy to install

No specialist contractor needed. With basic tools and a friend, anyone can do it.

Quick

A weekend is enough to have your foundations ready. No waiting for concrete to cure.

Removable

Change of plan? Unscrew them and reuse the screws on a new project. They leave no trace in the ground.

Cost-effective

Foundation costs are generally lower (−30/50%). You save even more by doing it yourself.

Low impact

No concrete, no polluting run-off. A sustainable foundation for your green projects.

* How the works are classified for planning purposes depends on local regulations and on the project: check with your designer and your local authority.

Kits for homeowners

Garden shed 4×4 m

Glass or timber garden room

~9 T4/T5 screws

Go to the catalogue

Deck 6×4 m

Timber or composite platform

~12 T3/T4 screws

Go to the catalogue

Pergola 5×4 m

Shade structure for a patio

~6 T4 screws

Go to the catalogue

Frequently asked questions

Can I install the foundations for a garden shed or a deck myself?

Yes. Up to the T6 series they are screwed in by hand, with a socket and a T-handle; the T7 requires a high-torque power driver. For a garden shed, two or three people are enough.

How many screws does a deck or platform need?

Decks and platforms use T3 or T4 on a close grid, one point every 1.5-2 m. The exact number depends on the dimensions: tell us about the project and we will tell you how many screws you need and which models to use.

How do you anchor a gazebo to the ground?

With T-Block T4, from 4 to 9 screws depending on the size of the gazebo. No ballast and no concrete.

Do I need a permit for ground screws in the garden?

The screws are not permanent masonry work in the ground, and the procedure is often simpler. How the work is classified under building rules, however, depends on the project and on local regulations: always check with your local authority or your appointed technician.

What if one day I want to move everything?

Unscrewed, the screws leave no trace in the ground. They can be reused in a new project.

More answers on service life, soils and permits in the FAQ.

Start your DIY project today

Tell us about your project: we will tell you how many screws you need and which models to use.

Ask for advice