Artificial stone For Garden XL-02

What problem the XL-02 solves — wide objects with extensive surrounding infrastructure

Some utility installations are not just wide — they are wide and surrounded by extensive disturbed zones. A large concrete manhole cover (DN800 or larger) sits flush with the lawn, but its concrete frame, apron, and the ring of excavated soil extend far beyond the cover itself. An oversized septic inspection hatch (ø 70–85 cm) with a wide concrete surround creates a large industrial zone in the middle of the garden. A cluster of irrigation main valves, manifolds, and pipe connections spreads across a wide area that no single compact stone can cover.

These wide infrastructure zones create a specific design problem.

The XL-02 resolves this with maximum dimensions on every axis. At 155 × 105 cm and only 26 cm peak height, it lies across the lawn like a massive flat field stone that has always been there. The 1.63 m² base area — the largest in the entire GARTENDEK range — covers not only the utility object itself but its frame, concrete apron, surrounding pipes, the disturbed soil ring, and the zone of disrupted lawn. One stone, one visual solution.

Who needs the XL-02:

• Owners of properties with oversized concrete or cast-iron manhole covers (DN800 and larger) where the cover plus its concrete frame, apron, and disturbed perimeter ring create a wide industrial zone
• Septic tank owners with oversized inspection hatches (ø 70–85 cm) embedded in wide concrete frames
• Properties with wide irrigation valve clusters — multi-zone manifold assemblies, master valve groups, and pipe junction zones spread across ø 80–85 cm
• Underground distribution box installations — telecom, electrical, or gas multi-compartment cabinets at grade level with surrounding excavated zones
• Properties with wide-collar well casings protruding 10–20 cm above grade with surrounding disturbed ground
• Owners wanting to eliminate large cut tree stumps (ø 75–85 cm) with their root plate and disturbed soil ring without grinding or excavation
• Designers seeking the largest possible single landscape-defining boulder accent in the GARTENDEK range — a horizontal centerpiece at lawn-edge or property-boundary scale

Before ordering — verify fit. Measure the widest point (diameter) and tallest point (height above ground, including frames, valve heads, and timer enclosures) of the object you want to conceal. The XL-02 accommodates objects up to ø 90 cm in diameter and ~21–23 cm in effective internal clearance height. If the object width is ≤ ø 80 cm, the more economical XL-01 (€352.94) may suffice. If the object fits within ø 90 cm with minimal surrounding infrastructure, the compact XL-04 (€362.25) is lighter and more affordable. If the object is taller than ~23 cm, no XL model fits — consider the L-series (heights up to 45 cm).

Construction, installation, and technical specification

The XL-02 is a hollow shell with a massive wide profile — 155 × 105 cm at the base, rising from approximately 15 cm at the edges to 26 cm at the central peak. The interior provides a usable coverage diameter of ~90 cm — the maximum in the GARTENDEK range.

Installation

• Two people required for transport and initial placement (23.50 kg, 155 cm length — comfortable handling needs two adults)
• Under 5 minutes from unpacking to final positioning
• No tools, no foundation, no anchoring required in standard residential conditions
• Place directly on grass, soil, gravel, mulch, or paving — the massive 1.63 m² base area provides excellent natural ground contact and stability

Operational mode — the key distinction

• Transport and placement: two people (23.50 kg, 155 cm length)
• Equipment access: one person — lift or tilt the stone in solo mode to inspect or service the concealed installation, then lower it back. This is the critical operational advantage for daily and weekly access scenarios.

Wind consideration — the large flat surface area (1.63 m²) can catch wind from below in exposed locations (open coastal sites, hilltop properties). In such cases, landscape anchoring stakes at the perimeter provide additional security, though this is not mandatory for most residential installations. For standard inland residential conditions, the 23.50 kg weight on 1.63 m² of ground contact is naturally wind-stable.

Seasonal behavior — 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. The stone performs identically in summer heat, autumn rain, and winter frost. It does not need to be removed, covered, or stored during any season.

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. This passive ventilation prevents condensation buildup inside the cavity in normal conditions.

Technical Specifications

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

The XL-02 is constructed from a multi-layer fiberglass composite (GFK) — the same class of material used in boat hull construction, chosen for its strength-to-weight ratio and long-term weather resistance. At 23.50 kg for a 155 × 105 cm slab, the XL-02 demonstrates the strength-to-weight performance that no other material category can match at this scale.

The outer surface is a marble chip and marble powder gelcoat of the ISO/NPG class. The color is not painted, not printed, not applied as a film. Natural stone chips and stone dust of different colors are mixed directly into the gelcoat compound during manufacturing. The color and grain are embedded in the material itself, producing a surface that ages gracefully rather than peeling, flaking, or fading.

The product is handcrafted (In Handarbeit gefertigt) — color and dimensional deviations of 3–5 cm are within normal range and contribute to the natural stone appearance. No two XL-02 units are bit-for-bit identical, just as no two natural field stones are identical.

Why GFK + ISO/NPG matters at XL-02 scale:

• A natural flat field stone of comparable dimensions (155 × 105 × 26 cm) weighs 800–1,500 kg, depending on lithology (granite, basalt, sandstone). The XL-02 achieves the same visual presence at 23.50 kg — a 97–98% weight reduction.
• This eliminates crane delivery, heavy machinery, reinforced foundations, soil compaction studies, and structural permits that a natural stone of this scale would typically require.
• Two people position the XL-02 in under 5 minutes. A natural 800–1,500 kg flat stone requires a crane or heavy-lift equipment, dedicated site access for trucks, and a prepared bearing surface.
• Budget plastic alternatives (HDPE / polyresin) at this scale essentially do not exist — the few products that approach 155 × 105 cm are structurally inadequate, lack the wall thickness for load-bearing, and degrade visibly within 2–3 outdoor seasons.

Comparison with typical alternatives:

The XL-02 occupies a position that neither extreme can reach: far lighter and more practical than a natural flat stone of the same dimensions, far more durable and visually convincing than budget plastic — and uniquely combining a hollow interior with a load-bearing, marine-grade composite shell at a scale that no alternative product offers.

Maintenance is minimal. Clean occasionally with water and a soft brush. No sealing, repainting, or chemical treatment is ever 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 gelcoat matting, minor degradation of the outer layer due to UV exposure);
• exposure to aggressive chemicals;
• use other than intended;
• modifications not agreed with GARTENDEK.

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

Real use scenarios — where the XL-02 is the only viable choice

Scenario 1 — Large manhole cover concealment (DN800+)

The primary XL-02 application. A large concrete or cast-iron manhole cover (DN800 or larger) sits flush with the lawn, but its concrete frame, apron, and the ring of excavated and re-compacted soil extend 30–40 cm beyond the cover itself. The owner has tried repositioning shrubs, planting low groundcover, and laying ornamental gravel — nothing visually integrates the industrial zone with the surrounding lawn. The XL-02's 155 × 105 cm base area hides the cover, frame, apron, surrounding pipes, and the entire ring of disturbed lawn in one gesture. The ø 90 cm interior accommodates the widest residential covers. Sewer service crews lift the stone (two people) once every 5–10 years for inspection. Daily life: the lawn looks intact.

Scenario 2 — Oversized septic hatch with wide concrete frame

An oversized septic tank inspection hatch (ø 70–85 cm) sits at the back of a property with a wide bordering concrete frame assembly that extends 40–50 cm in each direction beyond the hatch itself. Standard septic tank covers are visible from the patio and create a permanent industrial focal point. The XL-02's 1.63 m² footprint hides both the hatch and the entire frame structure, sitting naturally at ground level as if a flat stone has always been embedded there. Septic service requires lifting the stone (two people) once every 1–3 years for emptying.

Scenario 3 — Irrigation valve cluster across a wide zone

A residential or small commercial property has an irrigation main valve box, a 6–8 zone manifold, a master shut-off, and several pipe junction connections spread across a wide area (up to ø 85 cm aggregate). Standard valve box covers are dark green plastic rectangles that scream "utility." A single XL-02 covers the entire utility zone in one stone. Equipment remains accessible at any time — lift the stone in two-person mode for major service, or tilt it in solo mode for routine valve checks.

Scenario 4 — Large underground distribution boxes

Cable, telecom, or gas distribution boxes and multi-compartment junction cabinets at grade level — particularly the larger multi-section variants found in newer residential developments and commercial properties. The 155 × 105 cm footprint covers even large multi-section installations and their surrounding disturbed ground in a single element. Utility crews can access the boxes by lifting the XL-02 (two people) when needed.

Scenario 5 — Wide well casing with concrete collar

A sealed well casing (ø 50–60 cm) with a wide concrete collar protruding 10–20 cm above grade — the casing and collar together create a 70–80 cm wide industrial zone that no smaller stone can fully cover. The XL-02 covers the casing, collar, and surrounding disturbed soil within its 1.63 m² base area. Annual well maintenance requires a single two-person lift.

Scenario 6 — Large tree stump concealment

A cut tree stump (ø 75–85 cm) at near-ground level — perhaps the result of removing a mature tree without paying for stump grinding (which is expensive and disruptive to surrounding root systems). The massive flat XL-02 slab hides the stump, root plate, and the ring of disturbed soil around it, restoring a clean lawn line. The stump decomposes naturally underneath over several years; the XL-02 simply remains in place as a landscape feature.

Scenario 7 — Utility cluster of multiple small elements

A grouping of garden utilities — outdoor electrical outlet box + water tap with backflow preventer + irrigation control valves + low-voltage lighting transformer — spread across a wide zone of perhaps 100 × 80 cm. Instead of using multiple smaller GARTENDEK stones (which would create a cluster of three or four visible boulder shapes), one XL-02 covers the entire cluster as a single unified stone. This produces a calmer, more deliberate visual impression than a multi-stone grouping over the same area.

Scenario 8 — Decorative landscape-defining accent (no concealment)

Many XL-02 owners purchase the stone purely for its landscape-defining presence, with no utility object underneath. The 155 × 105 cm flat slab creates the impression of an enormous embedded glacial erratic — a centerpiece at property boundaries, beside large water features, anchoring an expansive lawn area, or as the dominant focal point in a minimalist Japanese-inspired or Scandinavian-inspired garden. At €552, the XL-02 is far cheaper than commissioning a natural granite slab of equivalent dimensions (€3,000–10,000+) and comes ready to place without crane delivery or foundation preparation.

Position of the XL-02 in the GARTENDEK system

The XL-02 is the flagship model of the XL-series and the largest artificial stone in the entire GARTENDEK range. It holds two absolute records: the largest exterior footprint (155 × 105 cm = ~1.63 m²) and the maximum interior coverage diameter ø 90 cm (shared with XL-04).

The critical comparison within the ø 90 cm class

Both models provide ø 90 cm interior coverage. The selection parameter is total area to conceal:

• XL-04 (1.07 m²) — the object fits within ø 90 cm with minimal surrounding infrastructure. Compact, lighter, more affordable.
• XL-02 (1.63 m²) — the utility zone extends well beyond ø 90 cm: wide frames, concrete aprons, pipe clusters. XL-02 is the only model that covers everything in one piece.

Comparison with smaller coverage diameters

Strategic conclusions:

• The XL-02 is the largest model in the entire GARTENDEK range by footprint area (~1.63 m² vs XL-01 ~1.21 m² vs XL-04 ~1.07 m²). It is also the heaviest (23.50 kg vs XL-01/XL-04 lighter) and the most expensive (€551.89 vs XL-01 €352.94 vs XL-04 €362.25).
• The XL-02 is the only model with the combination of ø 90 cm interior + 1.63 m² footprint — a niche that no other GARTENDEK model occupies. For wide objects with extensive surrounding infrastructure, no alternative within or outside the catalogue can substitute.
• The L:W ratio 1.48:1 gives the XL-02 a distinctly elongated horizontal silhouette, distinguishing it from the more square XL-04 (1.01:1). This shape character — elongated horizontal flat slab — is itself a strong landscape statement, evoking the embedded glacial erratic archetype.
• Peak height 26 cm — slightly taller than XL-01 / XL-04 (both ~23 cm) — gives the XL-02 a more pronounced central rise, reinforcing the natural-boulder reading at viewing distances of 3–5 m.

Choose the XL-02 when:

• The object to conceal exceeds ø 80 cm, requiring the ø 90 cm class
• The surrounding infrastructure zone (frames, aprons, pipes) requires maximum footprint coverage
• You need the largest possible single stone to eliminate all visible utility elements in one piece
• A landscape-defining massive boulder accent is desired

Consider a different model when:

• The object fits within ø 90 cm with minimal surrounding infrastructure → XL-04 (compact, lighter, €362.25 vs €551.89)
• The target object is ≤ ø 80 cm → XL-01 (ø 80 cm, €352.94) is more economical
• The target object is taller than ~21–23 cm → no current XL model covers this; consider the L-series (heights up to 45 cm with L-04, ø up to 80 cm with L-01)

Pricing position in GARTENDEK value scale

XL-02 €551.89 + €170 delivery = €721.89 total to the customer. This positions the XL-02 as the premium flagship of the catalogue: a buyer choosing XL-02 over XL-04 pays ~52% more — but receives 52% more footprint area and the only solution for objects with extensive surrounding infrastructure. Value comes not from base economics (€/kg of coverage area), but from scale monopoly: there is no other product in the catalogue that delivers this combination of dimensions.

The XL-02 works as a standalone landscape centerpiece or as part of a multi-stone arrangement combining massive XL slabs with upright S, M, or L boulders for a varied, natural-looking stone grouping.

Frequently Asked Questions

1. Does the XL-02 look realistic, or will people notice it is artificial?

The surface is formed from real marble chips and marble powder embedded in an ISO/NPG gelcoat — not painted, not printed, not film-applied. The texture and color variation mimic a natural granite field stone. At normal viewing distance (1 m+), the XL-02 is not identifiable as artificial. The massive flat asymmetric form and 155 × 105 cm scale reinforce this — it resembles an enormous field stone naturally embedded in the landscape, the kind of glacial erratic too large to have ever been placed by human hands.

2. How many people are needed for installation?

Two people for transport and initial placement — the stone weighs 23.50 kg and measures 155 cm in length. Installation takes under 5 minutes on any surface, with no tools or foundation. For daily equipment access, one person is sufficient — lift or tilt the stone to inspect or service the concealed installation, then lower it back. This is the key operational distinction: two-person setup, one-person daily operation.

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

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

4. What is the maximum object size the XL-02 can cover?

The interior coverage diameter is approximately 90 cm — the maximum in the GARTENDEK range — with a peak height of 26 cm (effective internal clearance ~21–23 cm). It is designed for the widest ground-level objects: oversized manhole covers (DN800+), large septic hatches with wide frames, irrigation valve clusters, large junction boxes. The 155 × 105 cm footprint (~1.63 m²) also conceals surrounding frames, aprons, and disturbed ground. For narrower objects (≤ ø 80 cm), consider XL-01.

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

Yes. No site preparation is required. The massive base area (1.63 m²) provides excellent natural stability on any surface — grass, soil, gravel, mulch, or paving. In wind-exposed locations (open coastal sites, hilltop properties), landscape anchoring stakes may be considered as an additional precaution, though this is not mandatory for most residential installations.

6. What is the difference between XL-02 and XL-04?

Both provide ø 90 cm interior coverage. XL-02 (155 × 105 cm, 1.63 m², 23.50 kg, €551.89) offers the maximum footprint — ideal when the utility zone extends beyond the object itself (wide frames, aprons, pipes). XL-04 (104 × 103 cm, 1.07 m², 15.50 kg, €362.25) is more compact and affordable — better when the object fits within ø 90 cm with minimal surrounding infrastructure. Choose based on total area to conceal, not coverage diameter alone.

7. Can I step on it accidentally?

Yes. The fiberglass composite shell supports over 100 kg of static load. It tolerates accidental stepping and garden traffic without deformation. Note: it is not a load-bearing structure and is not designed for impact loads, jumping, or active play without prior structural adaptation.

8. Is the XL-02 available in different colors?

Yes — two color variants: Red and Gray. The color is formed by adding different natural stone chips into the gelcoat compound, so each variant has authentic stone-like color variation. Custom colors for B2B / project orders are available via individual customization at minimum order quantities.

9. Can I drill holes for cables or pipes?

Yes. The GFK composite can be drilled with masonry drill bits or hole saws, or cut with a stone-cutting disc on an angle grinder. Walls are typically 10–15 mm thick, so this takes only a few minutes. Note: any modification voids the surface UV warranty in the modified area.

10. What are the maintenance requirements?

Minimal. Clean occasionally with water and a soft brush to remove organic debris (leaves, pollen, bird droppings). No sealing, repainting, or chemical treatment is ever required. Avoid harsh chemicals (acid cleaners, solvents, aggressive degreasers) — these can damage the gelcoat surface and void the warranty.

11. What is the delivery cost and timeline?

Delivery cost is €170 (separate from product price) for standard EU destinations. The XL-02 ships on a custom non-standard pallet (1540 × 1100 × 380 mm) via specialized freight carriers. Standard EU delivery timelines are 7–14 business days after stock confirmation. For destinations outside the EU, contact GARTENDEK directly at gartendek.com for individual quotation.

12. Is the XL-02 suitable for commercial / B2B applications?

Yes. The XL-02 is used in public parks, educational campuses, hotel grounds, commercial landscaping, 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 processes

Contact GARTENDEK directly for B2B project inquiries.