Artificial stone For Garden M-04

What problem M-04 solves

Gardens and outdoor spaces contain tall, narrow utility elements at ground level: well casings with above-ground risers, vertical pressure tanks, tall standpipes with fittings, backflow preventer assemblies on vertical risers, upright pump shafts, and elevated junction boxes. These objects are too tall for any other GARTENDEK model — the next tallest is M-03 at 32 cm, leaving a +10 cm gap that only M-04 fills.

Simultaneously, these objects are often not very wide — ø 15–50 cm — so they don't need the massive footprint of M-01 (109 × 89 cm) or M-03 (85 × 83 cm).

Traditional solutions fall short. Natural stone is visually ideal but weighs 200–350 kg, cannot be hollowed to shelter equipment, and costs €800–3,000+. Budget plastic covers are lightweight but their painted surfaces fade, crack, and chalk within two to three outdoor seasons.

The M-04 resolves this as the tall-narrow specialist: 42 cm height + ø 51 cm coverage in the smallest M-series body (68 × 62 cm). It is the only GARTENDEK model with enough vertical clearance for objects above 32 cm.

A note on fit before you order. The dimensions above are interior guidelines, not a fit guarantee. Before ordering, we strongly recommend contacting the GARTENDEK team with the exact measurements of your equipment — we will confirm whether this stone fits your installation and, if needed, recommend a different model or a customised version.

How the product works

The M-04 is a hollow shell with a tall, angular, blocky boulder shape — steep near-vertical sides, sharp fracture-like edges, and an asymmetric peak (≈38–42 cm). The interior provides a usable coverage diameter of ~51 cm, accommodating standard EU well casings (ø 125–160 mm) with significant clearance. The vertical volume is sufficient for equipment up to ≈38–39 cm tall (accounting for wall thickness at the crown).

Installation is immediate. Place the stone directly over the target object on any surface: grass, soil, gravel, paving. No anchoring, no foundation, no tools. Total setup time: under 2 minutes. To access the equipment underneath, lift the stone. At 11.50 kg, the M-04 is fully manageable by one person.

Stability comes from the stone's own weight and its base footprint (68 × 62 cm). For exposed or windy locations, landscape anchoring stakes around the base can be used.

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. 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.

Safety and load limitations — the product supports 100+ kg of static load under normal conditions. It is not a load-bearing structure, is not designed for impact loads, and is not intended for jumping or active play without prior structural adaptation of the product. Use in children's and public zones is possible with a pre-agreed usage scenario, engineering adaptation of the structure, and coordination of safety requirements.

Material and durability philosophy

The M-04 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.

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

Handcrafted production (In Handarbeit gefertigt) — color and dimensional deviations of 3–5 cm are within normal range. At 1 metre viewing distance, the M-04 is not identifiable as artificial.

GARTENDEK M-04 vs Alternatives

The M-04 occupies a deliberate middle position: lighter than stone, far more durable and realistic than budget plastic, and uniquely combining a hollow interior with a load-bearing, marine-grade composite shell that doubles as a garden seat.

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

Composition logic. The M-04 is the M-size member of the chopped rocky trilogy (S-04 + M-04 + L-04). In a multi-stone garden composition, its natural companions are S-04 and L-04 of the same colour — placed together, the three stones read as one broken outcrop at three scales. In a single-stone role, the M-04 works as a standalone vertical accent or as a Sitzstein in a garden relaxation zone. Mixing M-04 in a tight group with round-boulder models (S-03, S-06, M-01, L-02, XL-04) or with sharp-ridge models (S-01, M-02, L-01) is not recommended — the shape languages do not blend. When using multiple stones of the same colour in a close group, expect natural tonal variation of the marble-chip gelcoat.

Equipment concealment. Cover a well casing with above-ground riser — submersible pump discharge pipes extending 30–40 cm above grade (standard EU ø 125–160 mm casings fit with clearance). Conceal a vertical pressure tank / membrane expansion vessel for home water supply (ø 35–50 cm). Hide a backflow preventer assembly on a vertical irrigation riser (assembly height 35–42 cm). Cover a tall standpipe or garden water tap on a high riser (30–40 cm above grade). Conceal an upright sump pump discharge column, a gas meter riser, a tall pond filter or UV clarifier, or a tall electrical distribution box for garden lighting or robotic lawnmowers.

Decorative seating stone (Sitzstein). The M-04 is the only GARTENDEK model positioned as a "Sitzstein" — a decorative garden seat at natural chair height (42 cm). The stone can simultaneously conceal equipment below and serve as a seating element in a garden relaxation zone. The 100+ kg load capacity supports functional sitting.

Vertical landscape accent. The tall angular blocky silhouette — 42 cm height — makes M-04 effective as a vertical stone accent in rock gardens, pond edges, flower beds, and areas with elevation changes. Unlike flat-profile models (M-01/M-02), the M-04 does not disappear in tall grass or summer foliage.

Tight-space installations. The M-04 has the most compact footprint in the M-series (68 × 62 cm) — ideal for narrow garden strips, areas near fences and hedges, and compact courtyards where larger M-series models would not fit.

Position inside the GARTENDEK system

The M-04 is the tallest model in the entire GARTENDEK range: 42 cm height (10 cm more than the next tallest M-03 at 32 cm). At the same time, it has the smallest diameter (ø 51 cm) and lowest price (€335.71) in the M-series — making it both the height specialist and the entry-price M-series model. At 11.50 kg (tied with M-02), it is the lightest M-series stone and the only one manageable by one person.

Choose M-04 when:

• the object to conceal is taller than 32 cm and fits within ø 51 cm;
• you need a decorative garden seat (Sitzstein) at natural chair height;
• available space is compact — the smallest M-series footprint (68 × 62 cm);
• you want M-series quality at the lowest M-series price (€335.71).

Consider a different model when:

• the target object exceeds ø 51 cm but is under 23 cm tall — M-02 (ø 73 cm, 89 × 79 cm, €337.48);
• the target object exceeds ø 73 cm — M-03 (ø 80 cm, 32 cm height, €378.24);
• you want the largest possible footprint — M-01 (109 × 89 cm, 27 cm, €377.74);
• the target object fits within ø 49 cm and is ≤ 46 cm tall — S-series (S-03 for height up to 46 cm, S-05 for width up to ø 49 cm).

Shape-family positioning

Beyond dimensions, M-04 has a dedicated role in the GARTENDEK shape taxonomy: it is the M-size member of the chopped rocky trilogy (S-04 + M-04 + L-04). Unlike M-01 (universal round-boulder), M-02 (sharp-ridge pair with S-01 and L-01) or M-03 (cubic solo statement piece), M-04 is defined by its trilogy: the three stones share one angular, fractured, near-vertical form language and are designed to be placed together as one weathered outcrop at three scales. M-04 does not mix well with round-boulder models (S-03, S-06, M-01, L-02, XL-04) or with sharp-ridge models (S-01, M-02, L-01) in a tight composition. Choose M-04 when the shape language of an angular fragmented boulder fits the scene — or when you are building the full S-04 + M-04 + L-04 trilogy.

M-series overview

Will the M-04 fit my specific equipment?

The dimensions listed above are interior guidelines, not a fit guarantee. Before ordering, contact the GARTENDEK team with the exact measurements of your installation (height above ground, diameter, clearance around the object). We will confirm compatibility and, if needed, recommend a different model or a customised version.

Can I place two M-04 stones next to each other, or mix M-04 with other models?

The M-04 is the M-size member of the «chopped rocky» trilogy — S-04 (small) + M-04 (medium) + L-04 (large). Its best multi-stone companions are S-04 and L-04 of the same colour: placed together, the three stones read as one weathered outcrop at three scales. Two M-04 stones side by side work only at clear visual distance — they are too similar to read as a natural pair. Mixing M-04 in a tight group with round-boulder models (S-03, S-06, M-01, L-02, XL-04) or with sharp-ridge models (S-01, M-02, L-01) is not recommended — the shape languages do not blend. For a close group, keep the colour consistent — grey with grey, red with red — and expect natural tonal variation in the marble-chip gelcoat.

Does the M-04 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. The texture and color variation mimic a natural angular granite boulder. At normal viewing distance (1 m+), the M-04 is not identifiable as artificial. Handcrafted production ensures unique natural color variation on each stone.

What is the tallest object the M-04 can cover?

The exterior height is 42 cm. Accounting for wall thickness at the crown, the interior clearance is approximately 38–39 cm. Objects up to ≈38 cm tall fit comfortably. This makes M-04 purpose-built for well casings with risers, vertical pressure tanks, and tall standpipes.

Can I use M-04 as a garden seat (Sitzstein)?

Yes. The M-04 is the only GARTENDEK model positioned as a "Sitzstein" (seating stone). The 42 cm height matches standard chair seat height (40–46 cm), and the 100+ kg static load capacity supports functional sitting. The stone can simultaneously conceal equipment below.

How does M-04 compare to M-02?

M-04 and M-02 are nearly identical in price (€336 vs €337) but completely opposite in purpose. M-02 is the flat, wide cover (ø 73 cm, 23 cm tall). M-04 is the tall, narrow cover (ø 51 cm, 42 cm tall). Choose M-02 for wide, low objects; choose M-04 for tall, narrow objects.

How does M-04 compare to S-03?

S-03 is 4 cm taller (46 cm vs 42 cm) but has a smaller coverage diameter (ø 45 cm vs 51 cm) and a significantly smaller footprint (63 × 50 cm vs 68 × 62 cm). If your object is ≤ ø 45 cm and needs maximum height, S-03 may work. If your object is 46–51 cm wide and needs 42 cm height, M-04 is the only option.

Can one person install the M-04?

Yes. The M-04 weighs 11.50 kg and requires no tools, no foundation, and no anchoring. Place it over the target object on any surface. Installation time: under 2 minutes.

Is the M-04 frost-proof?

Yes. The GFK composite with ISO/NPG gelcoat is frost-proof to −30 °C and UV-stable to +60 °C. Designed for year-round permanent outdoor placement without any seasonal maintenance.

What colors are available?

Two color variants: Gray (Grau) and Red (Rot). Color is formed by adding natural stone chips of different hues directly into the gelcoat compound — it is part of the material, not a coating.

Where is the M-04 manufactured?

Manufactured in Italy and dispatched from Slovenia (EU) by VSDN d.o.o., the company behind the GARTENDEK brand.