Artificial stone For Garden XXXL-01

What problem it solves

Large residential and commercial properties contain utility infrastructure that exceeds the coverage capability of any XL model: commercial septic tank covers with hatches ø 100–135 cm, DN1000/DN1200 concrete manhole shafts with frame diameters ø 110–135 cm, ground-level transformer cabinet housings ø 100–130 cm, large pump station access covers, tall well casings, and above-grade utility clusters. These objects require both extreme diameter (> ø 90 cm) and significant height clearance (> 26 cm) — conditions no XL model can satisfy.

XXXL-01 resolves this with the absolute maximum parameters in the GARTENDEK system: ø 140 cm interior coverage, 175 × 150 cm footprint, and ≈50–55 cm effective internal height at the peak. It is the only model capable of covering objects wider than ø 90 cm or taller than ≈20 cm.

The height advantage is critical. XL models (23–26 cm) are flat slabs concealing only low-profile objects. XXXL-01's 60 cm peak height — the absolute lineup record — accommodates equipment up to ≈50 cm tall: tall pump housings, above-grade transformer cabins, protruding well casings, and stumps extending well above ground level. This is a fundamentally different class of concealment task.

Beyond concealment, XXXL-01 serves as a landscape design anchor at property scale — a defining 175 × 150 × 60 cm boulder that replicates a large naturally embedded glacial erratic in parks, hotel gardens, commercial campuses, and residential estates. At this scale, the stone becomes an architectural element rather than merely a utility cover.

Natural boulders of comparable dimensions weigh 3,000–4,000 kg and require a crane. Budget plastic covers are not structurally viable at 175 cm span. In the EU segment "ready-made decorative hollow stone ø ≥ 130 cm, EU production" — there are no direct competitors. XXXL-01 occupies a monopoly position.

How the product works

The XXXL-01 is a massive hollow shell with an asymmetric multi-peaked boulder profile — 175 × 150 cm at the base (ratio 1.17:1), rising from approximately 35 cm at the lowest edge through ≈50 cm at the intermediate zone to 60 cm at the central peak. The interior provides a usable coverage diameter of ≈140 cm — the absolute maximum in the GARTENDEK range — with ≈50–55 cm effective internal clearance at the highest point.

Installation takes 15–30 minutes (including unpacking, site assessment, and placement). Place the stone directly over the target object on any surface. No anchoring required, no foundation, no tools. No permanent changes to the site.

Transport and placement: minimum two people, three recommended — at 46.50 kg and 175 cm length, a minimum of two adults is required; three is strongly recommended for controlled, precision placement. Equipment access: one person is sufficient — the stone can be tilted or one edge lifted by a single person for brief maintenance or inspection, then lowered back. This is the key operational distinction for daily use.

Wind anchoring is recommended — the 2.63 m² footprint at 60 cm height creates a significant wind-exposed surface area. Landscape anchoring stakes at the perimeter are recommended in exposed locations. However, the 46.50 kg mass provides substantial inherent resistance.

Delivery: large freight shipment — at 83.50 kg gross weight in a 1600 × 1770 × 680 mm crate, XXXL-01 ships as palletised freight, not a standard parcel delivery. Forklift or pallet truck access at the delivery point is strongly recommended. Delivery cost: €250.

Seasonal behavior is neutral. The fiberglass composite structure does not absorb water, does not expand or contract meaningfully with temperature changes, and tolerates a continuous operating range from −30 °C to +60 °C.

Base contact — the stone has a non-sealed base and rests directly on the ground surface. It is not hermetically sealed; natural micro air exchange between the interior cavity and the surrounding environment is possible through the ground contact zone.

Material and durability philosophy — why GFK + ISO/NPG marble gelcoat at this scale

XXXL-01 is built from a multi-layer fiberglass composite (GFK) — the same material class used in marine-grade boat hull construction, chosen for its strength-to-weight ratio and long-term outdoor durability. At 46.50 kg net for a stone measuring 175 × 150 × 60 cm, XXXL-01 demonstrates strength-to-weight characteristics that no other material category in this size range can match.

The exterior surface is an ISO/NPG-grade gelcoat with embedded natural marble chips and marble powder. The colour is not painted, not printed, not applied as a film. Natural stone chips and stone powder in varying colours are mixed directly into the gelcoat composition during manufacture. Colour and grain are built into the material itself, producing a surface that ages gracefully rather than peeling, cracking, or fading.

The product is handcrafted (In Handarbeit gefertigt) — colour and dimensional deviations of 3–5 cm are normal and contribute to the natural-stone appearance. No two XXXL-01 units are bit-for-bit identical, just as no two natural glacial erratics are identical.

Why GFK + ISO/NPG matters at the XXXL-01 scale:

• A natural granite boulder of comparable dimensions (175 × 150 × 60 cm) weighs 3,000–4,000 kg, depending on lithology. XXXL-01 achieves the same visual presence at 46.50 kg — a 98.4–98.8% weight reduction.
• This eliminates the crane delivery, heavy-equipment site access, reinforced foundation, soil compaction studies, and structural permits that natural stone of this size would invariably require.
• Two people position XXXL-01 in 15–30 minutes (three recommended for ergonomic comfort). A natural 3,000–4,000 kg granite boulder requires truck-mounted crane delivery, concrete foundation engineering, and dedicated heavy-equipment site access — typical project costs in the €5,000–15,000+ range before the stone itself.
• Cheap plastic alternatives (HDPE / polyester resin) are simply not manufactured at ø ≥ 140 cm. The format does not exist on the consumer market in any meaningful production volume. XXXL-01 occupies a category where no commercial alternative exists at this dimension class.

Comparison with the only viable alternatives at this scale:

XXXL-01 occupies a position that no other product on the European market replicates: the only ready-made, in-stock, hollow decorative boulder at ø ≥ 140 cm manufactured to marine-grade standards within the EU. There is no direct catalogue competitor in this dimension class. The closest alternatives are custom one-off GRP fabrications (4× the price, 16-week lead time, variable quality) or natural granite boulders (10–25× the project cost, requires crane infrastructure).

Maintenance is minimal. Clean occasionally with water and a soft brush. Sealing, repainting, or chemical treatment are never required.

Warranty

The GARTENDEK warranty on artificial stones is 5 years from the date of delivery.

The warranty does not cover:

• mechanical damage;
• cosmetic changes (natural matting of the gelcoat, minor degradation of the outer layer caused by UV exposure);
• exposure to aggressive chemicals;
• use beyond the intended purpose;
• modifications not pre-approved by GARTENDEK.

The warranty applies in addition to the consumer's statutory rights under applicable EU legislation.

Real-world use scenarios — where XXXL-01 is the only viable choice

Scenario 1 — Commercial septic / cesspool inspection hatches (ø 100–135 cm)

Large commercial or multi-unit residential properties (hotels, restaurants, apartment complexes, agritourism estates, campsites) frequently have oversized septic system inspection hatches in the ø 100–135 cm range, set in concrete frames extending 20–30 cm beyond the hatch itself. Standard masking solutions (smaller decorative stones, planter boxes, gravel rings) cannot cover the full installation zone. XXXL-01's ø 140 cm internal coverage and ~2.63 m² footprint conceal the hatch, the concrete frame, and the surrounding disturbed-soil ring in a single boulder. Maintenance crews lift the stone (two people, three recommended) once every 1–3 years for tank servicing. Daily impression: an integrated landscape boulder where the property owner once had a visible industrial focal point.

Scenario 2 — DN1000 / DN1200 manhole shaft frames (ø 110–135 cm)

Municipal and large-private-development manhole shafts use DN1000 or DN1200 standardised frame systems with concrete collars extending the surface footprint to ø 110–135 cm. These frames mark sewer access, stormwater inspection points, district heating service shafts, and telecom main distribution chambers. On commercial properties, hospitality grounds, and high-end residential developments, the visible industrial appearance is incompatible with the surrounding landscape design. XXXL-01 is the only ready-made decorative concealment product on the EU market capable of covering DN1200 frames in a single piece. Service access is preserved — utility crews coordinate with the property manager to lift the stone during scheduled maintenance.

Scenario 3 — Ground-level transformer cabins and electrical substations (ø 100–130 cm)

Compact ground-level transformer cabins and small substations on commercial properties, hotel grounds, and high-end residential developments occupy a footprint of approximately ø 100–130 cm. These installations are essential infrastructure but visually disruptive — bright green or grey metal cabinets that signal "industrial zone" in any landscape context. XXXL-01 conceals the entire cabin within its ø 140 cm coverage envelope while preserving full ventilation (open-bottom design) and unrestricted utility access. Critical: verify electrical clearance and ventilation requirements with the local utility provider before installation. For utilities requiring active cooling, consult GARTENDEK directly for engineered ventilation modifications.

Scenario 4 — Large pump stations and water meter chambers (ø 100–120 cm)

Commercial and large-residential pump stations (irrigation main pumps, fire suppression boost pumps, well system distribution) and oversized water meter chambers occupy ø 100–120 cm at ground level, often with associated valve clusters and pipe penetrations extending the footprint further. XXXL-01's ~2.63 m² base area conceals the chamber, surrounding piping, valve assemblies, and disturbed soil zone in a single placement. Daily impression: an organic landscape feature where the property previously had a visible utility installation.

Scenario 5 — Very large tree stumps (ø 100–135 cm)

Removal of mature trees (mature oaks, beeches, planes, chestnuts) leaves stumps in the ø 100–135 cm range at near-ground level. Stump grinding for stumps of this size is expensive (€800–2,500 depending on access) and destructive to surrounding root systems and adjacent landscape features. XXXL-01's massive flat-to-domed slab profile conceals the stump, the root plate, and the surrounding disturbed soil ring, restoring a clean lawn line. The stump decomposes naturally beneath the stone over 5–10 years; XXXL-01 simply remains in place as a permanent landscape feature.

Scenario 6 — Large water-feature infrastructure

Major garden water features (reflection pools, koi ponds, large fountains) require substantial infrastructure: filtration systems, UV clarifiers, biological filters, pump housings, electrical control panels — frequently grouped in installation zones of ø 100–130 cm. XXXL-01 conceals the entire equipment cluster while preserving ventilation, electrical access, and serviceability. The hollow boulder integrates visually with the water feature itself, transforming a utilitarian equipment cluster into a complementary landscape element.

Scenario 7 — Landscape-defining focal boulder (no concealment function)

Many XXXL-01 buyers acquire the stone purely for its landscape-defining presence, with no concealment object beneath. The 175 × 150 × 60 cm massive multi-peaked boulder profile creates the impression of an enormous embedded glacial erratic — a centrepiece on a property boundary, beside a major water feature, anchoring a large lawn area, or as the dominant focal point in a minimalist Japanese-inspired or Scandinavian-inspired garden design. At €907.35, XXXL-01 is dramatically less expensive than commissioning a natural granite boulder of equivalent dimensions (€10,000–25,000+ delivered and installed) and arrives ready to position without crane delivery or foundation preparation.

Scenario 8 — Municipal utility concealment in public landscape design

Municipal authorities, public park designers, and infrastructure planners increasingly seek ways to integrate utility infrastructure (manhole shafts, transformer cabins, pump stations) into public landscape design without compromising service access. XXXL-01 is the only ready-made product on the EU market enabling this integration at ø ≥ 140 cm coverage. Public deployment scenarios include riverside park landscaping, urban plaza utility concealment, hotel and hospitality grounds, university campus landscapes, and corporate headquarters grounds.

Scenario 9 — Commercial property landscaping (hotels, restaurants, retail)

Commercial property managers responsible for hospitality and retail grounds frequently inherit infrastructure installations (HVAC ground units, generator pads, oversized utility chambers) that disrupt the landscape impression critical to guest and customer experience. XXXL-01 enables single-stone concealment of installations up to ø 140 cm coverage, transforming visible operational infrastructure into integrated landscape features. The 5-year warranty and 10+ year service life align with commercial property capital planning cycles.

XXXL-01's position in the GARTENDEK system

XXXL-01 is the absolute flagship of the entire GARTENDEK lineup — the only model in the XXXL series and the largest, tallest, heaviest, and most expensive artificial stone in the catalogue. It holds three absolute records: largest internal coverage diameter (ø 140 cm), largest external footprint (~2.63 m²), and greatest peak height (60 cm).

Critical comparison: XXXL-01 vs. XL-02 (the next-largest model)

Strategic implications:

• XXXL-01 is not an incremental upgrade — it is a category leap. The transition from XL-02 to XXXL-01 represents a 2× weight class, a 2.3× height class, and a 2.4× internal clearance class. XXXL-01 is the only model in the catalogue that conceals truly large infrastructure (DN1000–DN1200 manhole frames, oversized septic hatches in the ø 100–135 cm class, ground-level transformer cabins).
• XXXL-01 occupies a monopoly position in the EU market for ready-made hollow decorative boulders at ø ≥ 130 cm. There is no direct catalogue competitor at this dimension class. The only alternatives are custom one-off GRP fabrications (4× the price, 16-week lead time) or natural granite boulders (10–25× the project cost, requires crane infrastructure).
• The 60 cm peak height fundamentally redefines what XXXL-01 can conceal. While XL-02 is limited to ground-level installations ≤ ~21–23 cm tall, XXXL-01's 50–55 cm effective internal clearance accommodates vertical infrastructure: ground-level transformer cabins, large pump stations, water meter chambers with raised access frames, and tree stumps that extend 20–40 cm above ground level.
• Form character differs fundamentally. XL-02 is a flat elongated slab evoking a partially buried glacial erratic. XXXL-01 is a multi-peaked 3D boulder with substantial vertical presence — visually closer to a freestanding natural glacial erratic boulder positioned as a landscape monument.
• Delivery infrastructure differs. XL-02 ships on a custom palette via standard freight. XXXL-01 ships on a custom 1600 × 1770 × 680 mm crate via palletised freight — not a standard parcel network. Delivery scheduling and site access requirements should be confirmed before order placement.

Choose XXXL-01 when:

• Object to conceal exceeds ø 90 cm (the maximum coverage of any XL model)
• Object exceeds ~21–23 cm in height (the maximum internal clearance of any XL model)
• You are concealing DN1000 / DN1200 manhole infrastructure, ground-level transformer cabins, oversized septic hatches (ø 100–135 cm), large pump stations, or very large tree stumps (ø 100–135 cm)
• You require a landscape-defining focal boulder at the largest available scale
• Project context is commercial / B2B / municipal where the unique scale and EU manufacturing pedigree are decision-critical

Choose a smaller model when:

• Object fits within ø 90 cm and ~23 cm height → XL-02 (€551.89) or XL-04 (€362.25) are appropriate at substantially lower cost
• Object fits within ø 80 cm → XL-01 (€352.94) or L-series models
• Site access does not accommodate palletised freight delivery (1600 × 1770 mm crate footprint, requires forklift or 2–3 people for unloading)

Price positioning in the GARTENDEK value scale

XXXL-01 €907.35 + €250 freight = €1,157.35 total to the customer. This positions XXXL-01 as the premium absolute flagship of the catalogue. The buyer choosing XXXL-01 over XL-02 pays ~64% more — but receives the only product in the EU market capable of concealing infrastructure at ø ≥ 130 cm in a single ready-made stone. The value does not derive from base economics (€/m² of coverage area) but from the monopoly position in dimension class: there is no other product in the catalogue, and effectively no other product on the European market, that delivers this scale combination.

XXXL-01 functions as a standalone landscape centrepiece, as the dominant element in a multi-stone arrangement combining the XXXL flagship with smaller XL, L, M, or S boulders for varied, naturally appearing stone groupings, or as a single-piece infrastructure concealment solution for commercial and municipal applications where no alternative product exists.

Frequently Asked Questions

1. Does XXXL-01 look realistic, or will people notice it's artificial?

The surface is moulded with real marble chips and marble powder embedded in ISO/NPG gelcoat — not painted, not printed, not applied as a film. Texture and colour variation mimic natural granite glacial erratic boulders. At normal viewing distances (1 m+), XXXL-01 is not identifiable as artificial. The massive multi-peaked 3D form and the 175 × 150 × 60 cm scale reinforce this — it resembles a colossal natural boulder that has been part of the landscape for centuries, the kind of glacial erratic that would be far too large to have been positioned by human hand.

2. How many people are required for installation?

Two people minimum for transport and initial positioning; three people recommended for ergonomic comfort. The stone weighs 46.50 kg net (83.50 kg gross with crate) and measures 175 × 150 × 60 cm. Initial installation takes 15–30 minutes. Once positioned, one person can tilt the edge to access the concealed equipment for routine inspection or service. This is the critical operational distinction: 2–3 people for setup, single-person edge access for routine operation.

3. Will it fade or crack after years of outdoor use?

No. UV stability is engineered into the ISO/NPG gelcoat — the same grade used in marine applications. Colour is integral to the material, not a surface coating. The declared service life is 10+ years of continuous outdoor exposure without fading, cracking, or delamination. The official warranty is 5 years.

4. What is the maximum size of object XXXL-01 can conceal?

Internal coverage diameter is approximately ø 140 cm — the absolute maximum in the GARTENDEK lineup — with a peak height of 60 cm (effective internal clearance ~50–55 cm at the peak, tapering to ~25 cm near the edges). It is engineered for the largest ground-level installations: DN1000 / DN1200 manhole frames, commercial septic hatches (ø 100–135 cm), ground-level transformer cabins (ø 100–130 cm), large pump stations, very large tree stumps (ø 100–135 cm). The ~2.63 m² footprint also conceals surrounding rings, foundations, and disturbed soil. This is the only ready-made hollow decorative stone in the EU market at ø ≥ 130 cm.

5. Can I place it directly on grass or soil?

Yes. No site preparation is required. The massive ~2.63 m² footprint provides excellent natural stability on any surface — grass, soil, gravel, mulch, or paving. Wind anchoring is recommended in exposed locations (open coastal sites, hilltop properties, large open lawn areas), particularly given the 60 cm peak height and the resulting wind profile. Landscape ground anchors or strategic ballasting inside the hollow can be deployed as a precaution. For most enclosed garden installations, the stone's own footprint and weight provide sufficient stability without anchoring.

6. What is the difference between XXXL-01 and XL-02?

XXXL-01 is fundamentally a different category of product, not an incremental upgrade. XL-02 (155 × 105 × 26 cm, 23.50 kg, ø 90 cm coverage, €551.89) is a flat elongated slab for ground-level installations ≤ ~21–23 cm tall, with a maximum coverage of ø 90 cm. XXXL-01 (175 × 150 × 60 cm, 46.50 kg, ø 140 cm coverage, €907.35) is a multi-peaked 3D boulder with ~50–55 cm internal clearance, capable of concealing vertical infrastructure (transformer cabins, pump stations, large tree stumps) and oversized installations (DN1000–DN1200 manhole frames). Choose based on both the coverage diameter required and the height of the object to be concealed.

7. Can I accidentally step on it?

Yes. The fiberglass composite shell withstands 100+ kg of static load (tested to 150 kg). It tolerates accidental footfall and garden traffic without deformation. Note: this is not a structural / load-bearing surface and is not engineered for impact loads, jumping, or active play without prior structural adaptation. For deployments in public spaces or play areas, consult GARTENDEK directly for engineered safety modifications.

8. Is XXXL-01 available in different colours?

Yes — two colour variants: Red and Grey. The colour is moulded by adding different natural stone chips to the gelcoat composition, so each variant has authentic, stone-like colour variation. Custom colours for B2B / project orders are available through individual customisation at minimum order quantities.

9. Can I drill holes for cables or pipes?

Yes. The GFK composite can be drilled with masonry bits or hole saws, or cut with a stone disc on an angle grinder. Wall thickness is typically 10–15 mm, so it takes only a few minutes. Note: any modifications void the surface UV warranty in the modified area. For B2B projects requiring custom cable / pipe penetrations, consult GARTENDEK directly for pre-engineered modifications during manufacture.

10. What are the maintenance requirements?

Minimal. Clean occasionally with water and a soft brush to remove organic deposits (leaves, pollen, bird droppings). Sealing, repainting, or chemical treatment are never required. Avoid aggressive chemicals (acidic cleaners, solvents, harsh degreasers) — they can damage the gelcoat surface and void the warranty.

11. What are the delivery costs and timelines?

Delivery cost is €250 (separate from product price) for standard EU destinations. XXXL-01 ships on a custom-engineered 1600 × 1770 × 680 mm crate via palletised freight — not standard parcel courier. Site access for the delivery vehicle and unloading equipment (forklift or 2–3 people) should be confirmed before order placement. Standard EU delivery timelines are 7–21 working days after stock confirmation. For destinations outside the EU, contact GARTENDEK directly at gartendek.com for individual quotation.

12. Is XXXL-01 suitable for commercial / B2B applications?

Yes — XXXL-01 is positioned as a B2B-first product while remaining accessible to high-end residential buyers. It is deployed in public parks, hotel grounds, hospitality estates, corporate headquarters landscaping, university campuses, and municipal infrastructure concealment projects. For B2B orders, GARTENDEK / VSDN d.o.o. offers:

• Project-specific engineering consultation
• Custom structural adaptation for safety compliance (children's zones, public spaces)
• Volume pricing
• Dedicated project management
• Documentation for public procurement and tender procedures
• Coordination with utility providers for transformer cabin and substation concealment projects

Contact GARTENDEK directly at gartendek.com for B2B project enquiries.