Application | Garden Rooms
GroundPlug® TwisterTM – a relaible foundation choice for your project

A Reliable Foundation for Garden Rooms of All Shapes and Sizes

Looking for a reliable foundation solution for your garden room? At GroundPlug®, we bring industrial-grade expertise to residential projects, offering high-performance steel foundations designed to handle heavy loads with ease.

Our GroundPlug® TwisterTM Screw Piles are a smarter, greener alternative to traditional concrete footings – engineered for strength, speed, and sustainability.

  • Our experienced engineers will calculate the exact foundation requirements for your garden room – at no extra cost.
  • You can install each foundation in just minutes using a handheld impact wrench – no heavy machinery required.
  • Say goodbye to backbreaking labor and messy construction sites. Our screw piles go straight into the ground with minimal disruption.
  • Once installed, you can start building immediately – no drying or curing needed.
  • GroundPlug® Screw Piles are a cleaner, greener choice that supports sustainable construction practices
twister-m20 TW 150

Are you building a garden room?

Are you planning on building a garden room? Send us the details and our skilled engineers will calculate your project FREE OF CHARGE! No binding, no commitments. Get your free quote in about three business days.

Which kind of deck are you going to build?
Please indicate size dimensions (m)

Select one or more options

If you do not know your soil conditions, remove the top 12 inches of the soil layer and take a sod of the soil you find below.

(If nothing is indicated, we calculate for stiff clay by default)

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To whom may we send the Quote?
Which kind of deck are you going to build?
Please indicate size dimensions (m)

Select one or more options

If you do not know your soil conditions, remove the top 12 inches of the soil layer and take a sod of the soil you find below.

(If nothing is indicated, we calculate for stiff clay by default)

Attach file
Attach file
Attach file
Which kind of deck are you going to build?
Please indicate size dimensions (m)

Select one or more options

If you do not know your soil conditions, remove the top 12 inches of the soil layer and take a sod of the soil you find below.

(If nothing is indicated, we calculate for stiff clay by default)

Attach file
Attach file
Attach file

Smart, Solid and Efficient Installation

GroundPlug® foundations for garden rooms can either be installed with handheld tools, a mini digger or an excavator – depending on the required foundation size. One thing all installation opportunities have in common are striking benefits regarding efficiency and reliability, resulting from our patented and innovative way of installing GroundPlug® Screw Piles.

3 easy steps to build a foundation frame

Double beam layered frame leveled with a spirit level.

Build your frame and
level it with fx kiles.

Screw your GroundPlug® Screw Pile into the ground with an impact wrench.

Install and mount your
screw pile foundations.

A double beam layered foundation frame with mounted GroundPlug® Screw Piles

Your foundation is ready.

4 easy steps to a construction using stabilisers

4 easy steps to a construction using stabilisers

Set a spade in the ground where your post should be located. Move the spade a little back and forth.

Screw your GroundPlug® TwisterTM Foundation into the ground.

Place the GroundPlug® TwisterTM Stabiliser on top of the foundation.

Move it into the ground with a hammer. Use a piece of wood between your hammer and the stabilizer to avoid damaging the galvanization.

Set a spade in the ground where your post should be located. Move the spade a little back and forth.

Screw your GroundPlug® TwisterTM Foundation into the ground.

Place the GroundPlug® TwisterTM Stabiliser on top of the foundation.

Move it into the ground with a hammer. Use a piece of wood between your hammer and the stabilizer to avoid damaging the galvanization.

Design Opportunities

GroundPlug® Screw Piles don’t set any limits to your garden room design. The only important thing is to choose a GroundPlug® solution that fits your individual project. This may vary depending on the size, weight and height of your garden room, amongst others.

Suitable For All Kinds of Conditions

  • GroundPlug® TwisterTM Foundations are suitable for many kinds of soil – from loose sand to stiff clay.
  • No limits due to terrain – easy installation in
    difficult accessible areas or on sloped terrain.
  • Installing GroundPlug® Screw Pile Foundations is also possible in frost or rain.

Cabin foundations to all kinds of conditions

  • GroundPlug® TwisterTM Foundations are suitable for many kinds of soil – from loose sand to stiff clay.
  • No limits due to terrain – easy installation in
    difficult accessible areas or on sloped terrain.
  • Installing GroundPlug® Screw Piles is also possible in frost or rain.

GroundPlug® Products For Garden Rooms

The size of your garden room plays a key role in choosing the right foundation solution. For smaller structures, our GroundPlug® M16 or M20 series offer a fast, reliable, and efficient solution — perfect for quick and hassle-free installation.

For larger garden rooms or heavier builds, we recommend our GroundPlug® PilexProTM series, designed for professional installation using a mini digger or excavator. Engineered for strength and stability, it’s the ideal choice for more demanding projects.

Not sure which option is right for you? Our team is here to help!

Other applications

Design opportunities

GroundPlug® Screw Piles don’t set any limits to your design. The only important thing is to choose a GroundPlug® solution that fits your individual project. This may vary depending on the size, weight and height of your garden room, amongst others.

Cabin foundations to all kinds of conditions

  • GroundPlug® TwisterTM Foundations are suitable for many kinds of soil – from loose sand to stiff clay.
  • No limits due to terrain – easy installation in difficult accessible areas or on sloped terrain.
  • Installing GroundPlug® Screw Piles is also possible in frost or rain.

Building a Deck? Use our 3D Deck Designer!

Calculate your own deck project within minutes!

Edit dimensions, pick your soil, add supporting walls, and so much more!

Large Construction & Infrastructure

Did you know that GroundPlug has the market’s largest range of steel foundations?

Have a look at our series for multi-storey construction, infrastructure and industrial construction.