Foundations Without the Digging.
Grand Screw Co. installs RADIX ground screw foundations for garden rooms, home extensions, log cabins, and solar arrays — faster, cleaner, and stronger than concrete.
What we install
Ground screw foundations for every project type — residential, commercial, and solar.
Ground Screw Installation
We supply and install RADIX ground screws for any project — from garden rooms and log cabins to large-scale commercial builds. No concrete, no mess.
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Garden Rooms & Extensions
The ideal foundation for timber-framed structures. Ready to build on the same day, with no curing time and no ground disturbance.
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Solar Racking Systems
Ground-mounted solar arrays need solid, precise foundations. We install solar racking systems that are perfectly aligned and built to last.
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Ground screws support a huge range of structures — if you're building it, we can found it.
View all servicesWhy choose ground screws?
RADIX ground screws offer a smarter, more sustainable approach to foundations. Compared to concrete, they are cleaner, faster, and kinder to the environment, while still delivering exceptional strength and reliability.
No digging required
Ground screws are driven directly into the ground — no excavation, no spoil removal, no disruption to gardens, trees, paving or natural habitats.
Ready same day
Build on your foundations the same day they're installed. Around 70% faster than concrete — no waiting for anything to cure.
Works anywhere
Sloping ground, enclosed spaces, difficult access — ground screws can be installed where traditional foundations would be challenging or costly.
Fully removable
Unlike concrete, ground screws can be removed and reused. No permanent damage to your land.
Low carbon
A sustainable, low-carbon alternative to concrete — reducing your environmental footprint with no chemical run-off.
All-weather install
We install year-round, in almost any weather, so your project schedule stays on track no matter the season.
How it works
Site survey
We visit your site, carry out ground resistance tests, and specify the right screw size and spacing for your project.
Installation day
Our team arrives with machine-driven installation equipment. Most residential jobs are complete in a single day.
Build-ready
Your foundations are level, load-tested, and ready for your builder to start immediately — no curing, no waiting.
What our customers say
"Roy and the guys made our transition from concrete foundations to ground screws very easy. From quoting right through to completion, everything was well planned and executed to the highest level. Highly recommend their product and service."
"Roy and his team provided an exceptional service installing the ground screws for my triple bay garage. Completed in less than one day — this innovative system allows foundations in difficult areas at a very cost effective level. Cannot recommend highly enough."
"Roy was extremely professional, helpful, fast and simply very nice. The team carried out ground testing and installed nearly 30 ground screws smoothly and professionally. The cost was one third cheaper than estimated. Five stars is probably not enough."
"Roy is contactable, delivers what he promises to a high quality and runs a hard-working team. His team installed a ground mounted support for 32 solar panels and dug a 50m trench in one day as planned. Everything was plumb and true. We'll be using him again."
"We have been using Roy and the team for some time to complete our ground mounted solar arrays. The service has been nothing short of excellent. The whole process has been seamless — they take the time to set everything out properly, with all screws carefully aligned using lasers for perfect accuracy."
"Roy has been honest, professional, punctual and has done everything he said he would do on time and at the agreed price with no hidden extras. We have other projects planned and I won't be looking elsewhere."
Areas we cover
We install ground screw foundations across the region. If your project is nearby, get in touch — we'll come to you.
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Ready to start your project?
Tell us what you're building and we'll come back with a fast, no-obligation quote — usually within 24 hours.