What is sintered stone?
Sintered stone is an innovative material obtained through a complex high-temperature sintering process (above 1200°C), where a mixture of natural minerals is compacted without the use of resins or chemical additives. The result is an extremely hard, uniform slab with superior resistance to wear, freeze-thaw cycles, UV rays and chemical agents. Unlike natural stone, it does not require protective treatments or sealing, offering minimal maintenance and consistent long-term performance, without colour changes or damage caused by weather conditions.
What is L'ALTRA PIETRA?
L'ALTRA PIETRA is the most complete and exclusive range of thick (2 cm) sintered stone, designed for outdoor applications. Manufactured in Italy, these products stand out for their faithful reproduction of natural stone aesthetics: veins, imperfections and subtle tonal variations – all reproduced with remarkable precision. This collection represents a benchmark in contemporary design for premium outdoor spaces, combining natural elegance with absolute technical performance.
The Colosseo Grigioni look
The Colosseo Grigioni model faithfully reproduces an exclusive Swiss granite, Onsernone. The surface reflects the specific texture of granite, with medium grey tones and discreet veining, offering an authentic, refined and versatile appearance. It is an ideal choice for modern, minimalist or elegant designs seeking a balance between natural beauty and technological precision.
2 cm thickness – recommended uses
Slabs with a 2 cm thickness are specially designed for high-demand outdoor applications:
- Outdoor paving: terraces, walkways, yards, sidewalks, garden pavilions.
- Commercial or public areas: urban pavements, squares, HoReCa spaces.
- Pool edges or wet zones: thanks to their water resistance and anti-slip properties.
- Installation on fixed substrate, gravel, sand or raised systems (adjustable pedestals).
The 2 cm thickness ensures excellent mechanical stability, making it suitable even for heavy traffic or projects requiring extended durability.
R11 finish – Anti-slip
The R11 finish indicates a high level of slip resistance, ideal for outdoor areas exposed to moisture or weather. The subtly textured surface ensures safe movement even in rain, snow or high humidity. Thus, Colosseo Grigioni becomes a safe and aesthetic choice for premium residential and commercial spaces.
Advantages of sintered stone compared to natural stone
- Exceptional resistance to scratches, traffic, thermal shock, chemical agents and UV radiation.
- Waterproof: does not absorb water, does not stain and does not develop mold.
- No sealing required: no waxing, sealing or periodic maintenance necessary.
- Dimensional and colour stability over time – it does not change its appearance.
- Sustainability: eco-friendly material, 100% recyclable, with no volatile emissions.
Recommended installation
For optimal performance and maximum durability, the following installation methods are recommended:
- On flexible adhesive:
- Recommended adhesive: Weber Stone or Weber Col Flex
- The substrate must be flat, clean, dry and stable.
- Apply expansion joints of at least 3 mm.
- On gravel or sand (dry-lay system):
- Ideal for removable terraces or pathways.
- The slabs are laid directly on a compacted support layer.
- On adjustable pedestals (raised installation):
- Recommended for ventilated terraces or technical spaces.
- Allows efficient drainage and easy access underneath the flooring.
Waterproofing is mandatory in areas directly exposed to weather.
Maintenance
Sintered stone does not require sealing or protective treatments. Its dense and non-porous surface prevents dirt from penetrating, and cleaning is done simply with neutral detergents and water. It is resistant to stains, mold, algae and common cleaning agents, ensuring quick and cost-free maintenance.
Conclusion
L'ALTRA PIETRA Colosseo Grigioni 60x60x2 cm R11 represents the perfect synthesis between natural aesthetics and advanced technology. A high-performance sintered stone, ideal for durable, safe and sophisticated outdoor designs where every detail matters.
Sintered stone can be used for raised installations with pedestals.
If you need help calculating the number of pedestals required for the chosen slab size and your specific project: click here Bera Planner
