Greenhouse Foundation Ground Screws – Stable & Sustainable Support Systems

Definition and Role in Greenhouse Construction

A greenhouse ground screw foundation is a hot-dip galvanized helical steel anchor that is mechanically driven into the ground to provide immediate, load-bearing structural support for greenhouse base frames, sill plates, and perimeter posts — replacing the concrete wall footings, pad foundations, and concreted-in post sockets that have traditionally supported greenhouse structures. Rather than excavating a trench, constructing formwork, pouring and curing concrete, and waiting days before the greenhouse frame can be erected, a ground screw is rotated into the soil in minutes using a torque driver, and the greenhouse base is bolted directly to the screw’s top adapter the same day.

Ground screws for greenhouse applications are used across the full spectrum of protected growing structures. For hobby and domestic greenhouses — aluminum-framed cold frames, lean-to glass extensions, and small polycarbonate panel structures in the 6–20 m² range — compact 76 mm diameter screws installed using handheld drive tools provide an immediate, level, and removable foundation without digging or concreting. For commercial polytunnels — low-cost poly-film structures on galvanized steel hoops in the 100–1,000 m² range — ground screws replace the traditional approach of hammering steel foot anchors into the ground or digging and concreting base tube sockets, both of which provide inconsistent embedment depth and poor frost resistance. For premium commercial glass greenhouses and venlo-style glasshouses — precision aluminum or steel structures on engineered perimeter foundations in the 500–5,000 m² range — larger-diameter, torque-verified ground screws provide the millimeter-precise, frost-stable foundation that glass panel systems and mechanized ventilation tracks require.

Unlike concrete perimeter walls — which permanently seal the soil, prevent natural water drainage, and lock the greenhouse into its current footprint — ground screw foundations preserve the soil biology and water percolation around the greenhouse base, allow the structure to be relocated when growing layouts change, and are fully extractable at end of life to restore the growing area to unconstrained agricultural land.

How Greenhouse Foundations Fit Within Ground Screw Applications

Greenhouse foundation is one of the most technically specific applications within the broader agricultural and structural outdoor category of ground screw use. It is distinguished from deck and fence foundation applications by its primary structural environment — open agricultural fields with high wind exposure, frost-susceptible soils, and moisture-rich organic growing conditions that place demanding corrosion requirements on any buried metalwork. It is distinguished from solar ground-mount applications by its structural geometry: a greenhouse perimeter foundation involves a dense array of closely spaced anchor points along a continuous base frame, each carrying modest individual loads but requiring exceptional positional accuracy to maintain the tight dimensional tolerances of a glazed frame system.

Greenhouse systems represent one of the fastest-growing agricultural applications of screw piles, driven by the global expansion of controlled-environment agriculture and the shift toward reversible, low-impact infrastructure on leased farmland. To understand how greenhouse structures compare with solar, decking, and fencing systems, explore all ground screw applications →

Wind Uplift and Structural Stability

Wind uplift is the governing structural design case for most greenhouse foundations, particularly for polytunnel and light-glazed structures where the roof surface area is large relative to the structure’s dead weight. A polytunnel covering 500 m² presents approximately 500 m² of curved surface to the wind — a sail area that generates substantial uplift forces under storm conditions. When wind flows over a curved greenhouse roof surface, the aerodynamic pressure difference between the outer face and the protected internal air creates a net upward force that can exceed the self-weight of the entire structure by a factor of 3–5 in a 90 mph wind event. The foundation system must resist this uplift force through the tensile pull-out capacity of the ground anchor — not just the compressive bearing capacity required to support the structure’s weight.

Ground screws provide bidirectional structural capacity that makes them exceptionally well-suited to greenhouse uplift resistance. The helical flight blades bear against the undisturbed soil above and below the helix plane, developing pull-out resistance equal to or exceeding compressive bearing capacity in most soil types. For a commercial polytunnel with perimeter ground anchor spacing of 1.8 m, a single 88 mm diameter screw installed to 900 mm depth in compacted agricultural loam can develop a pull-out resistance of 15–25 kN (1,500–2,500 kg) — providing a safety factor of 2.5–3× against the typical design uplift load per anchor point on a medium-sized commercial polytunnel in moderate wind conditions. Because greenhouses have large surface areas exposed to wind, uplift resistance is a critical design factor. A broader explanation of uplift mechanics can be found in the load calculation overview →

Greenhouses sited in particularly exposed locations — hilltops, coastal areas, open flat plains — require conservative uplift design with closer anchor spacing, larger-diameter screws, or deeper installation to achieve adequate pull-out resistance. Charley’s Greenhouses and other specialist suppliers note that for windy sites, anchor stakes and additional base frame connection points are essential — and that anchor foundation depth must always reach below the frost line to ensure stability through winter conditions. The combination of frost-line embedment and torque-verified anchor capacity that ground screws provide in a single installation step makes them the most reliable anchor system for high-wind greenhouse sites.

Lateral Load Resistance in Open Fields

Agricultural greenhouses are typically sited in open field environments with minimal wind shelter — conditions that maximize lateral wind pressure on the end walls and sidewalls of the structure. The end walls of a polytunnel or multi-span glasshouse are the most heavily loaded lateral surfaces: a single end wall of a 9 m wide polytunnel can present 30–45 m² of solid surface area to the wind, generating lateral forces of 8–15 kN on the end frame posts under design wind conditions. These lateral forces are transferred through the base plate or anchor channel into the ground through a combination of passive soil bearing resistance along the screw shaft and the bending stiffness of the shaft itself in the soil.

For greenhouse foundation screws, lateral resistance is developed through the full embedded shaft length below the ground surface. A 76–88 mm diameter screw with 800–1,000 mm of embedment in firm agricultural subsoil develops lateral resistance of 3–8 kN per anchor point — sufficient for all but the most severely exposed or tall greenhouse end wall configurations. For very large commercial greenhouses or structures in Exposure Category D coastal wind environments, the foundation engineer may specify larger shaft diameters, deeper installation, or paired screw configurations at end wall posts to provide the lateral rigidity required by the structure’s racking resistance design. For a detailed breakdown of how foundations resist horizontal forces, see lateral vs axial load →

Soil Type and Bearing Capacity in Agricultural Land

Agricultural land presents some of the most variable and challenging soil conditions encountered in any ground screw application. Years of cultivation — plowing, rotavating, irrigating, and amending — can create a deep, loose topsoil layer with very low bearing capacity extending 400–600 mm below the surface before the natural subsoil stratum is reached. In intensively farmed vegetable growing areas, topsoil depths of 600–800 mm are not unusual, and the natural subsoil below this cultivation horizon may have been compacted by machinery traffic into a dense pan layer — or may be soft and saturated if the site has poor natural drainage.

Sandy agricultural soils — widespread in market garden areas, coastal plains, and light arable land — offer good drainage and relatively low cohesion. In clean, dry sandy conditions, bearing capacity is adequate for greenhouse foundation loads at moderate screw depths, but pull-out resistance can be lower than in clay soils because the soil does not grip the helix plate as firmly in the absence of cohesion. The American Galvanizers Association’s soil performance research confirms that hot-dip galvanized steel performs particularly well in brown sandy soils because the larger soil particles wick moisture away from the buried steel surface more quickly, reducing the average moisture exposure that drives corrosion. Clay-rich agricultural soils — common in lowland arable areas — offer higher cohesion and better pull-out resistance per unit of helix area, but are more susceptible to seasonal volume changes and frost heave in cold climates. Organic soils — peat, fenland, or soils with high compost amendment — have the lowest bearing capacity and highest corrosion aggressivity of any agricultural soil type, and require the most conservative foundation depth and corrosion class specification. Soil composition plays a major role in foundation depth and diameter selection. Learn more in the soil condition engineering guide →

Equipment Selection for Small and Large Greenhouses

Equipment selection for greenhouse ground screw installation depends on the scale of the structure, the diameter of the screws required, and the soil conditions at the site. For hobby and domestic greenhouses — requiring 8–20 foundation screws of 51–76 mm diameter — a high-torque electric impact driver with a hex shaft adapter and a calibrated torque indicator is sufficient for the homeowner or small contractor to achieve correct installation in typical garden or light agricultural soils. The minimal equipment requirement for small greenhouse installations is one of ground screws’ most compelling practical advantages over concrete foundations: the homeowner with a quality cordless drill and a torque wrench can install a complete hobby greenhouse foundation in a few hours without any equipment hire.

For commercial polytunnels and glasshouses requiring 50–500+ foundation screws of 76–114 mm diameter, a machine-mounted hydraulic torque driver provides the work rate, torque output consistency, and positional control needed to complete a large installation efficiently. Compact tracked machines — mini-excavators of 1.5–3.5 tonnes, dedicated ground screw installation rigs, or tractor-mounted hydraulic drive units — are the most common installation platforms for commercial agricultural projects. Tractor-mounted drive units are particularly practical on agricultural sites where a farm tractor is already on-site and the terrain is suitable for wheeled machine operation, eliminating the need to mobilize a specialist tracked rig to a remote farm location. Proper installation ensures long-term structural reliability. Detailed procedures are outlined in the installation best practices guide →

Postech Screw Piles and other specialist greenhouse foundation suppliers confirm that their ground screw systems require only one worker and one piece of equipment for installation — a work rate and resource requirement that is substantially lower than any concrete foundation method of equivalent structural performance. This low equipment and labor demand translates directly into reduced installation cost and shorter construction timelines, allowing greenhouse structures to be erected and in production weeks earlier than concrete-founded alternatives.

Precision Leveling and Alignment for Frame Integrity

Greenhouse structures — particularly glass-glazed systems and precision aluminum-frame polytunnel variants — require foundation alignment accuracy that is significantly tighter than most other ground screw applications. A glazed greenhouse with glass panel dimensions of 700 mm × 1,500 mm requires base frame leveling accuracy of ±3–5 mm over the full perimeter to ensure that glass panes sit correctly in their frame rebates without distortion-induced stress or air gap-induced heat loss. Aluminum venlo glasshouse systems and polycarbonate twin-wall glazing systems have similar tolerance requirements, driven by the dimensional precision of their extrusion-based frame connections.

Achieving this precision with ground screws requires a systematic leveling process using the screw’s adjustable top adapter to fine-tune each foundation point’s height after driving. The standard installation sequence for a precision greenhouse application is: establish a laser level datum at the base frame height; drive all perimeter screws to depth and minimum torque; use the telescopic adapter adjustment to bring each anchor point to within ±2 mm of the laser datum; install the base frame and verify level along all perimeter sections before any glazing or cladding is begun. This process is straightforward and reliable when the installer has adequate height adjustment range in the top adapter system — a minimum of 100–150 mm is recommended for greenhouse applications to accommodate the natural variation in final screw depth across a large agricultural site.

Installation Depth and Torque Monitoring

The minimum installation depth for a greenhouse ground screw must simultaneously satisfy: the structural pull-out resistance required for wind uplift design (which drives depth into competent bearing soil), and the frost protection requirement (which drives depth below the local frost line for cold-climate installations). For a commercial polytunnel in a temperate climate with a frost line of 600–750 mm, screw shaft lengths of 1,000–1,200 mm are typical, providing adequate frost protection and ensuring that the helical anchor reaches the dense natural subsoil below the cultivation horizon with 200–400 mm of embedment below the frost line. In colder continental climates — central Canada, northern Scandinavia, high-altitude farming regions — frost lines of 1,200–1,500 mm require proportionally longer shafts to maintain frost-resistant anchor placement.

Torque monitoring during installation provides the field verification that each anchor has reached adequate bearing material. For commercial greenhouse projects — where a single structural failure of a large polytunnel in a storm event can destroy an entire crop worth tens of thousands of dollars — torque monitoring at every anchor point is not just best practice but a fundamental risk management requirement. Digital torque logging systems that record and export installation data for every screw provide a permanent quality assurance record that supports structural warranty claims, insurance requirements, and the due diligence documentation needed for agricultural finance and grant applications that increasingly require evidence of building consent and structural compliance for permanent and semi-permanent protected growing structures.

Frost Heave Resistance in Cold Climate Agriculture

Cold climate agriculture is among the most demanding environments for greenhouse foundations. In regions where winter air temperatures regularly drop below −10°C — northern Europe, Canada, the U.S. Midwest and Northeast, upland farming areas — the agricultural soil surrounding a greenhouse foundation undergoes repeated freeze-thaw cycles that progressively displace shallow foundations upward through the frost heave mechanism. For a glass greenhouse, even 10–20 mm of differential frost heave between adjacent foundation points can crack glazing panels, jam ventilation mechanisms, and misalign gutter drainage channels. The cost of replacing broken glass and realigning a heaved frame section far exceeds the incremental cost of specifying a correctly frost-protected foundation from the outset.

Postech Screw Piles, a Canadian specialist in agricultural screw pile foundations, explicitly designs their greenhouse pile systems to be installed below the frost line — noting that this placement ensures the structure will not flex regardless of surface soil conditions in winter, preventing glass panel failure and door malfunctions in glazed greenhouse systems. The GoliathTech foundation system adds an additional protection layer by inserting polyurethane inside the pile shafts to prevent the helix from freezing underground in winter — eliminating the residual risk of ice lens formation at the helix location even when the pile is installed marginally close to the frost line. In regions with freezing winters, frost heave can damage shallow foundations significantly. Frost heave resistance is explained in detail at frost heave resistance →

Resistance to Soil Moisture and Organic Conditions

Greenhouse growing environments are intrinsically high-moisture. Irrigation systems — overhead spray, drip lines, sub-irrigation channels — maintain the growing medium at high moisture content year-round, and the runoff and drainage from intensive watering permeates the soil around the greenhouse perimeter continuously. If the greenhouse base frame sits on or close to the soil surface, the soil at each foundation point is almost perpetually wet — the most aggressive possible environment for buried metalwork. The foundation system must be designed to tolerate continuous soil moisture exposure without strength or serviceability degradation over the greenhouse’s full design life of 20–30 years or more.

Soils in intensive horticultural growing areas are also enriched in organic matter through years of compost, manure, and green waste amendment. High organic content increases soil acidity (lowering pH), elevates microbial activity, and creates reducing conditions at depth where oxygen is depleted — all of which accelerate the corrosion of buried metalwork. For greenhouse foundations in high-organic-content soils, the corrosion protection specification must be uprated beyond the standard ISO 1461 minimum, either through increased zinc coating thickness, additional protective coatings, or the specification of stainless steel hardware at the soil-air interface transition zone where corrosion conditions are most aggressive.

Corrosion Protection for Long-Term Agricultural Use

The American Galvanizers Association’s research on hot-dip galvanized steel in soil establishes that corrosion rates in agricultural soils range from less than 0.2 microns per year in favorable brown sandy soils to 20 microns per year or more in highly aggressive gray clay or organic soils. This 100× range in corrosion rate illustrates why a generic “standard galvanizing” specification without soil chemistry assessment is inadequate for commercial greenhouse foundations expected to perform for 25–30 years. An ISO 1461 minimum coating of 70 µm on a structural steel section would last 350 years in the most favorable sandy soil environment — or just 3.5 years in the most aggressive organic clay soil — a range that makes proper soil chemistry assessment not optional but essential for correct specification.

For greenhouse applications in typical mixed agricultural soils (pH 5.5–7.0, moderate organic content, periodic waterlogging), a hot-dip galvanized coating of 85–100 µm average thickness — achievable under ISO 1461 Class A specification for heavier steel sections — provides a practical service life of 30–50 years in the most common agricultural soil conditions, with appropriate safety margin for the variability of real-world soil chemistry. In soils known to be aggressive — pH below 5.5, high sulfate content from agricultural fertilizers, soils amended with composted wood containing copper-based preservative compounds, or soils with measured resistivity below 1,000 ohm-cm — epoxy primer or bitumen coating on the buried section of the screw, in addition to standard galvanizing, provides the supplementary protection needed for full design-life coverage. Proper material selection depends on soil chemistry and moisture levels. See corrosion classes explained →

Faster Installation and Reduced Site Disturbance

Traditional concrete greenhouse foundations — whether a continuous perimeter strip footing, a series of concrete pad footings, or individual concreted-in post sockets — all share the same fundamental installation constraints: excavation, concrete placement, curing time, and the generation of significant soil disturbance around the greenhouse footprint. For a commercial polytunnel of 500 m² requiring 80 perimeter foundation points, a concrete footing approach involves 80 individual excavations, concrete placement and curing at each point, and a mandatory 24–48 hour wait before any structural work can proceed. On a working farm where time is money and the growing season waits for no one, this multi-day foundation timeline is a genuine commercial disadvantage.

RADIX’s documented comparison of screw pile versus concrete foundation performance confirms that ground screw installations typically require just one to two people and a single day — compared to the extensive manpower, heavy machinery, and long hours demanded by concrete foundations of equivalent structural scope. For a commercial polytunnel, this compresses the foundation phase from three to four working days (concrete) to a single day (ground screws), allowing the structure to be erected and film-clad within the same week. Unlike concrete pads, screw piles require no excavation or curing time, and can be installed immediately adjacent to existing plant beds without disturbing the surrounding growing area. A full comparison of performance and cost is available in ground screw vs concrete →

Reversible and Sustainable Agricultural Foundations

Agricultural land is a finite and increasingly valuable resource. Greenhouses sited on leased agricultural land — as is common in commercial horticulture, where operators lease fields from landowners under short-term growing agreements — must be fully removable at the end of the lease period, restoring the land to its pre-greenhouse condition for continued agricultural use. Concrete greenhouse foundations are irremovable without demolition-grade breaking equipment and generate inert waste that must be removed from the site and disposed of at cost. Ground screw foundations can be extracted intact in a fraction of the time required to break out equivalent concrete footings, leaving the soil profile effectively undisturbed and the land immediately available for the next crop cycle or the next growing tenant.

This reversibility is not just a practical convenience — it is increasingly a condition of planning approval and agricultural land lease agreement for new greenhouse developments. Regulators and landowners alike are requiring binding decommissioning commitments from greenhouse operators that include complete foundation removal. Ground screws are currently the only foundation system that can credibly make and fulfill this commitment at commercial greenhouse scale without disproportionate cost or land damage.

Lower Lifecycle Cost for Commercial Greenhouses

The lifecycle cost of a greenhouse foundation includes not just the initial installation cost but the cost of any repairs or adjustments needed over the greenhouse’s operating life, and the decommissioning cost at end of life. Concrete foundations that suffer frost heave displacement require expensive re-leveling of the greenhouse base frame, replacement of cracked glazing, and re-alignment of ventilation and gutter systems — costs that accumulate over repeated winter-summer cycles on frost-susceptible sites. Ground screws installed below the frost line avoid these recurring costs by maintaining consistent foundation position through all seasonal cycles without maintenance intervention.

At decommissioning, the cost difference between concrete removal and ground screw extraction is substantial. Breaking out a concrete perimeter footing from a 500 m² commercial greenhouse typically requires a day of mini-excavator and breaker work, generating several tonnes of concrete rubble for skip disposal at $80–150 per tonne. Extracting the equivalent ground screw perimeter foundation requires the same machine used for installation running in reverse — a half-day operation that generates zero waste and recovers the screws as reusable assets. The extracted screws can be reinstalled at a new growing site, sold to another greenhouse operator, or returned to the supplier for credit — a circular economy outcome that has no parallel in concrete foundation decommissioning.

Hobby and Backyard Greenhouses

Hobby greenhouses — aluminum-framed glass or polycarbonate panel structures in the 6–20 m² range installed in domestic gardens and allotment plots — are one of the largest volume applications for small-diameter ground screws in the residential market. These structures are lightweight, frequently sited on garden soil that has been cultivated to significant depth, and installed by homeowners rather than professional contractors. The combination of lightweight structure, deep loose topsoil, and non-specialist installation context makes ground screws the ideal foundation solution: they require no specialist equipment beyond a heavy-duty drill driver, they can be installed to the frost line depth needed for cold-climate stability without an excavator, and they provide a level, adjustable foundation base that tolerates the soil variability of a typical garden plot.

Charley’s Greenhouses and other specialist hobby greenhouse suppliers note that for cold climate installations, the foundation must always reach below the local frost line depth — a requirement that ground screws satisfy by design, while the alternative ground anchor spike systems commonly supplied with hobby greenhouse kits are typically too short to reach frost-line depth in most cold-climate locations, resulting in heave-damaged frames after the first winter.

Commercial Horticulture Facilities

Commercial horticultural greenhouses — venlo glasshouses, Keder houses, multi-span polytunnels, and insulated growing tunnels used for year-round vegetable, herb, flower, and soft fruit production — require foundation systems that can support large structural spans, resist severe wind uplift, maintain precise dimensional tolerances for glazing and cladding systems, and be installed rapidly to minimize the delay between site preparation and crop planting. Ground screws meet all of these requirements, and VersaPile’s commercial greenhouse case study documentation confirms that helical piles are specifically selected for commercial greenhouse projects because of their ability to resist high uplift forces from frost even when lightly loaded — a performance characteristic that concrete foundations in frost-susceptible agricultural soils frequently fail to match.

For large commercial glasshouse complexes — heated glass production facilities of 2,000–10,000 m² used for tomato, cucumber, and pepper production — the precision and speed of ground screw installation on a large perimeter foundation scope can compress the civil works phase from several weeks to a few days, meaningfully shortening the time to first harvest and improving the project’s financial return. The structural engineering support needed for commercial-scale greenhouse foundation specifications — including screw size selection, installation depth and torque criteria, and corrosion class designation based on soil analysis — is a core competency of Solar Earth Screw’s engineering service.

Agricultural Agrivoltaic Systems

Agrivoltaic systems — which combine solar power generation with active crop production under or between panel rows — represent an emerging application where greenhouse and solar technologies converge. In some advanced agrivoltaic designs, translucent or bifacial solar panels are mounted on elevated racking above growing tunnels, allowing diffused light to reach crops while generating electricity. In others, greenhouse structures and solar ground-mount arrays are co-located on the same site, sharing infrastructure, water harvesting systems, and foundation networks. Ground screws are the only foundation system that can serve both the greenhouse base frame and the adjacent solar racking from the same product family — simplifying procurement, enabling unified installation planning, and providing a consistent structural interface between the two systems.

For solar-based agricultural systems and agrivoltaic installations, see solar ground mount foundation →

How deep should greenhouse ground screws be installed?

The minimum installation depth for a greenhouse ground screw depends on soil type, wind uplift design load, and local frost line depth. As a practical starting point, the helical anchor should be placed at least 300 mm below the natural subsoil horizon (below the cultivation layer) for structural bearing, and at least 150–300 mm below the local frost line depth for frost protection in cold climates. In temperate UK and northern European climates with frost lines of 450–600 mm, screw shaft lengths of 800–1,000 mm are typical for hobby greenhouse applications and 1,000–1,200 mm for commercial polytunnels. In colder continental climates — Canada, northern Scandinavia, central Europe — frost lines of 900–1,500 mm require shaft lengths of 1,200–1,800 mm to maintain frost-protected anchor placement. Always check the local building code frost depth requirement for your specific project location before selecting screw shaft length.

Can ground screws be used in sandy agricultural soil?

Yes — ground screws perform well in sandy agricultural soils when specified with the appropriate diameter and depth for the soil’s lower cohesion characteristics. The American Galvanizers Association’s soil research confirms that hot-dip galvanized steel performs particularly favorably in sandy soils from a corrosion perspective, because the larger soil particles drain moisture away from the buried steel surface more rapidly than in clay soils. From a structural perspective, sandy soils require deeper screw installation and potentially larger helix diameters to develop pull-out resistance equivalent to that achieved in cohesive clay soils, but this is readily managed through appropriate specification. Performance in sandy soil is discussed in detail within the soil condition engineering guide →

How many screws are required for a 500 m² greenhouse?

A 500 m² commercial polytunnel — for example, a 25 m × 20 m single-span structure — would typically have a perimeter of approximately 90 m. With a standard anchor spacing of 1.5–2.0 m along the perimeter, this gives 45–60 perimeter foundation screws. Additional screws may be required at end wall posts, ridge support points for multi-bay structures, and any internal equipment mounting points. For large multi-span glasshouse complexes, the total screw count will be higher due to internal structural support requirements. The exact quantity depends on the specific greenhouse manufacturer’s base frame design, the span dimensions, and the design wind uplift load for the site location. Required quantities depend on structural load calculations. Review load calculation basics →

Are greenhouse ground screws removable and reusable?

Yes — this is one of the most commercially important properties of ground screws for agricultural greenhouse applications. Ground screws are fully extractable using the same drive equipment used for installation, running in reverse rotation to unscrew the anchor from the soil. GoliathTech explicitly documents that unlike traditional concrete foundations, screw piles are reusable and removable, meaning they can be moved to other parts of your property — a property that Postech and other agricultural pile specialists similarly confirm. The extraction process is clean, rapid, and generates no construction waste. Extracted screws retain their structural integrity and galvanizing condition and can be reinstalled at a new site, sold, or returned for credit. For leased agricultural land, this extractability is the decisive advantage that makes ground screws the only fully compliant foundation choice for greenhouses subject to a decommissioning obligation at lease end.

Request Agricultural Foundation Advice

Tell us about your greenhouse project — structure type and size, site location and soil conditions, local frost depth, and any specific engineering or planning requirements — and our team will recommend the right screw specification, anchor spacing, installation depth, and corrosion class for your application. We provide practical technical support for greenhouse foundation projects of all scales, from a single hobby greenhouse to a multi-hectare commercial growing operation.

Request Agricultural Foundation Advice →

Get a Greenhouse Project Quote

Once you have confirmed your greenhouse layout, anchor spacing, and ground screw specification, our team can provide a fully itemized project quote including screws, leveling adapters, base frame fixings, and any additional installation hardware required for your greenhouse system. For commercial horticulture projects requiring structural engineering documentation to support building consent applications or agricultural grant submissions, we can provide a comprehensive technical package including load tables, installation specifications, corrosion class certification, and a project-specific foundation design note.

Get a Greenhouse Project Quote →