A Reliable Foundation for Any Home Extension
Need a dependable foundation for your home extension? At GroundPlug®, we apply industrial-strength engineering to residential projects—delivering durable steel foundation systems built to support even the heaviest loads with confidence.
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
Are you building an extension?
Are you planning on building an extension? 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.
Smart, Solid and Efficient Installation
3 easy steps to build a foundation frame
Build your frame and
level it with fx kiles.
Install and mount your
screw pile foundations.
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 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 extension, 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 Extensions
The size of your extension 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 extensions 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.
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.