Decking Foundations. On Any Slope.
Whether you're building a flat timber deck, a multi-level composite terrace, or an over-water boardwalk — ground screws give you a solid, level base on any terrain. No earthworks, no concrete mess, no waiting.
Why Deck Builders Choose Ground Screws
Six reasons timber and composite deck installers trust us with their foundations.
Solves any slope
Each screw individually height-adjusted. Decks built dead-flat on hillsides and uneven lawns.
Prevents timber rot
Joists raised cleanly off the ground, fully ventilated. Vastly extends deck life.
No earthworks
Zero excavation, no spoil, no concrete pads. Your garden stays as it was.
Same-day handover
We install the screws in a day, the deck builder fixes joists directly the same afternoon.
Future-proof
Decks lift cleanly if you ever need to relocate or extend. No concrete to demolish.
Hot tubs supported
Higher-spec screws under hot tub footprint to handle 1-2 tonne dynamic loads.
From Survey to Solid
Free Site Survey
We assess the slope, soil type, and intended deck design to spec the right screws and layout.
Engineered Quote
Fixed-price quote within 24 hours, with screw spec, spacing, and load capacity for your deck's footprint.
One-Day Install
Our team installs each screw to your deck builder's exact spacing — typically 1.2-2m intervals depending on joist span.
Hand-Over
Every screw cap left perfectly level, ready for the deck builder to fix joists directly. Often same-day handover.
Decking Foundations:
Ground Screws vs Concrete Posts.
Concrete Posts
- 3-7 day cure before deck can be built
- Post-hole digging required
- Timber sits on damp concrete (rots faster)
- Permanent — can't relocate the deck
- Concrete cracks in frost
MW Ground Screws
- Joists fixed same day
- Zero excavation needed
- Timber raised above ground (lasts longer)
- Deck can be lifted cleanly
- Install in any season
How We Build A Decking Base.
The number of screws and the layout depend on the size, height and load of the deck, so every base is engineered to its own plan. For most domestic decks that means a handful of screws driven in a single day — with no excavation, no spoil and no concrete to cure — and the timber frame can go straight on top. Because each screw is set and levelled individually, ground screws handle sloping, soft or awkward-access plots that are difficult to concrete. Every installation is backed by our 35-year structural guarantee.
Read our reviewsDecking Foundations Across Our Six Counties.
Decking Foundations: Frequently Asked Questions
How many screws do I need for my deck?
Can ground screws support a composite deck?
What about hot tubs on the deck?
Can I install decking over a slope without retaining walls?
Are ground screw decks suitable for boardwalks and bridges?
Will the deck feel as solid as one on concrete posts?
How long does a typical decking foundation take?
Can the screws be removed if I sell the house?
35 years guaranteed.
~60 years engineered.
Every screw under your deck is backed by a 35-year structural guarantee. Hot-dip galvanised steel construction, designed to outlast the deck itself.
- Hot-dip galvanised steel
- Engineered to load spec
- Documented at installation
Every ground screw we install is backed by a 35-year structural guarantee. Depending on ground conditions, the hot-dip galvanised steel construction has an expected lifespan in the region of 60 years — significantly longer than the concrete it replaces.
*Expected lifespan depending on ground conditions.
Ready to build your deck?
Free site survey within 48 hours. Fixed-price quote within 24 hours. 35-year guarantee on every install.