{"product_id":"hammer-stone-grey-paving-slabs","title":"Hammer Stone Grey Porcelain Paving Slabs 900x600x20 mm (21.6 SQM, 40 Slabs Per Pack)","description":"\u003cscript type=\"application\/ld+json\"\u003e\n[\n  {\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Are Hammer Stone Grey porcelain paving slabs suitable for UK weather?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. These slabs are frost resistant and specifically designed to perform in the UK climate. Their exceptionally low water absorption prevents structural moisture damage and splitting during severe winter freezing temperatures.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Are these paving slabs slip resistant?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. Hammer Stone Grey porcelain slabs feature a certified R11 slip resistant surface, providing highly reliable underfoot safety for patios, garden pathways, and outdoor living zones during wet weather.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Do porcelain paving slabs require sealing?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"No. Vitrified porcelain paving is inherently non-porous and does not require liquid sealants or ongoing protective surface treatments to retain its performance, color, or stain resistance.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"What size are Hammer Stone Grey porcelain paving slabs?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"These paving slabs are supplied in a popular large-format 900x600mm size with a calibrated 20mm thickness, engineered specifically for long-lasting external structural paving.\"\n        }\n      },\n      {\n        \"@type\": \"Question\",\n        \"name\": \"Are porcelain paving slabs easy to maintain?\",\n        \"acceptedAnswer\": {\n          \"@type\": \"Answer\",\n          \"text\": \"Yes. Porcelain slabs require minimal maintenance. Because mud, moss, and garden soot cannot sink into the vitrified surface layer, an occasional sweep and clean with water is all that is required.\"\n        }\n      }\n    ]\n  }\n]\n\u003c\/script\u003e\n\n\u003ch1\u003eHammer Stone Grey Porcelain Paving Slabs 900x600x20 MM\u003c\/h1\u003e\n\n\u003cp\u003eTransform your outdoor living footprint with the elegant profile of \u003cstrong\u003eHammer Stone Grey Porcelain Paving Slabs\u003c\/strong\u003e, brought to you by \u003cstrong\u003ePaving and Slabs Ltd\u003c\/strong\u003e. Striking the ideal balance between contemporary aesthetics and heavy-duty wear, these premium flags deliver a sophisticated, \u003cstrong\u003eneutral grey stone appearance\u003c\/strong\u003e. The popular 900x600mm layout scales up patio footprints seamlessly, reducing joint frequency to maximize visual flow across modern landscapes and garden terraces.\u003c\/p\u003e\n\n\u003cp\u003eCrafted using cutting-edge \u003cstrong\u003evitrified porcelain technology\u003c\/strong\u003e, these dense 20mm outdoor-calibrated flagstones are engineered to withstand the volatile British climate. The dense composition yields an ultra-low porosity level that denies moisture entry entirely, removing the risks of winter frost splitting, deep organic discoloration, and surface algae colonization without ongoing upkeep.\u003c\/p\u003e\n\n\u003cdiv style=\"background-color: #fafafa; padding: 20px; border-radius: 8px; margin: 20px 0; border: 1px solid #e3e3e3;\"\u003e\n    \u003ch3 style=\"margin-top: 0; color: #111;\"\u003eHammer Stone Grey Performance Highlights\u003c\/h3\u003e\n    \u003cul style=\"column-count: 2; list-style-position: inside; margin-bottom: 0;\"\u003e\n        \u003cli\u003e\n\u003cstrong\u003eR11 Slip Resistance:\u003c\/strong\u003e High-friction safety texture ensures reliable grip in wet seasons.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eNeutral Grey Palette:\u003c\/strong\u003e Provides consistent tones without natural stone stone variations.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eVitrified Frost Protection:\u003c\/strong\u003e Rejects water penetration to protect against seasonal frost cracks.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eLow Upkeep Surface:\u003c\/strong\u003e Naturally deters mud, leaf tannins, and moss growth over time.\u003c\/li\u003e\n    \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eVersatile Architectural Landscaping Potential\u003c\/h2\u003e\n\u003cp\u003eUnlike traditional concrete paving or raw quarried stones that display vast dimensional variations and fade over time, Hammer Stone Grey flags provide exceptional manufacturing precision. This allows contractors and DIY specialists to lay highly uniform, clean spacing borders. Its clean, adaptable mid-toned grey landscape coordinates naturally with timber decking elements, white rendered partitions, lawns, and modern outdoor kitchen configurations.\u003c\/p\u003e\n\n\u003cp\u003ePlanning a garden renovation or designing an entertaining space? Discover trending layout systems by checking out our marketplace breakdown of the \u003ca href=\"https:\/\/pavingandslabs.co.uk\/blogs\/latest-news\/best-paving-slabs-for-patios-and-gardens-in-2025-stylish-yet-affordable-choices\"\u003ebest paving slabs for patios and gardens\u003c\/a\u003e. For property planners calculating lifecycle value targets, our comparative guide on \u003ca href=\"https:\/\/pavingandslabs.co.uk\/blogs\/latest-news\/break-even-patio-options-in-the-uk-paving-slabs-vs-gravel-vs-decking\"\u003ebreak-even patio options in the UK (slabs vs gravel vs decking)\u003c\/a\u003e provides clarity on budget durability.\u003c\/p\u003e\n\n\u003ch2\u003eCreative Design Pairings \u0026amp; Border Accents\u003c\/h2\u003e\n\u003cp\u003eThe highly adaptable canvas of Hammer Stone Grey serves as a brilliant architectural base that integrates effortlessly with several design options across our shop collection:\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBold Monochromatic Contrast:\u003c\/strong\u003e Interlock or border your neutral layout using our deep \u003ca href=\"https:\/\/pavingandslabs.co.uk\/products\/anthracite-dark-paving-slabs\"\u003eAnthracite Dark Paving Slabs\u003c\/a\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSoft Natural Gradations:\u003c\/strong\u003e Build a layered tone-on-tone landscape effect by introducing \u003ca href=\"https:\/\/pavingandslabs.co.uk\/products\/kandla-grey-porcelain-paving-slabs\"\u003eKandla Grey Paving Slabs\u003c\/a\u003e.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-Contrast Definition:\u003c\/strong\u003e Pair your grey layout zone alongside pristine, light tiles like our \u003ca href=\"https:\/\/pavingandslabs.co.uk\/products\/quartz-white-paving-slabs\"\u003eQuartz White Porcelain Slabs\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eView our entire inventory selection by dipping into our main \u003ca href=\"https:\/\/pavingandslabs.co.uk\/collections\/porcelain-paving\"\u003ePorcelain Paving Collection UK\u003c\/a\u003e, comprehensive \u003ca href=\"https:\/\/pavingandslabs.co.uk\/collections\/patio-slabs\"\u003ePatio Slabs UK\u003c\/a\u003e, and organic \u003ca href=\"https:\/\/pavingandslabs.co.uk\/collections\/indian-sandstone\"\u003eIndian Sandstone UK\u003c\/a\u003e catalogs.\u003c\/p\u003e\n\n\u003ch2\u003eProfessional Installation Parameters \u0026amp; Maintenance\u003c\/h2\u003e\n\u003cp\u003eTo establish a flawless, lifelong installation, Hammer Stone Grey porcelain flags must be laid over a well-compacted MOT Type 1 aggregate core upon a \u003cstrong\u003efull continuous wet mortar bed\u003c\/strong\u003e. Never utilize spot-bedding methods; leaving empty structural hollows beneath the stone tiles invites moisture collecting and causes pressure crack points under foot traffic. A professional porcelain bonding slurry primer must be brushed across the reverse side of every slab immediately prior to seating onto the bed to form an unbreakable bond.\u003c\/p\u003e\n\n\u003cp\u003eKeep a uniform 3 to 5mm joint spacing gap and set up a drainage slope profile of 1 in 80 away from building structural walls. Maintenance is remarkably simple—since dirt and leaf stains sit loosely on top of the vitrified glaze layer rather than soaking into it, simple brushing and an annual pressure wash keep the area pristine. Review our master guide on \u003ca href=\"https:\/\/pavingandslabs.co.uk\/blogs\/latest-news\/how-to-clean-and-maintain-paving-slabs-long-lasting-patio-tips\"\u003ehow to clean and maintain paving slabs\u003c\/a\u003e for advanced seasonal care techniques.\u003c\/p\u003e\n\n\u003cdiv style=\"border-top: 1px solid #ddd; margin-top: 30px; padding-top: 20px;\"\u003e\n    \u003ch3\u003eTechnical Data Matrix \u0026amp; Structural Specs\u003c\/h3\u003e\n    \u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n        \u003ctbody\u003e\n            \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n                \u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa; width: 30%;\"\u003eProduct Format\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003eLarge-Format Rectilinear Single Paving Flag\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n                \u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003eDimensional Size\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003e900mm x 600mm\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n                \u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003eThickness Calibration\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003e20mm Calibrated External Profile (Heavy-Duty Pedestrian Grade)\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr style=\"border-bottom: 1px solid #eee;\"\u003e\n                \u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003eSafety Traction Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003eCertified R11 Anti-Slip Surface Texture\u003c\/td\u003e\n            \u003c\/tr\u003e\n            \u003ctr\u003e\n                \u003ctd style=\"padding: 10px; font-weight: bold; background-color: #fafafa;\"\u003eMaterial Profile\u003c\/td\u003e\n\u003ctd style=\"padding: 10px;\"\u003eHammer Stone Grey Vitrified Stoneware Matrix\u003c\/td\u003e\n            \u003c\/tr\u003e\n        \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"faq-section\"\u003e\n    \u003ch4\u003eAre Hammer Stone Grey porcelain paving slabs suitable for UK weather?\u003c\/h4\u003e\n    \u003cp\u003eYes. These slabs are frost resistant and designed to perform well in the UK climate. Their low water absorption prevents moisture damage during freezing temperatures.\u003c\/p\u003e\n    \n    \u003ch4\u003eAre these paving slabs slip resistant?\u003c\/h4\u003e\n    \u003cp\u003eYes. Hammer Stone Grey porcelain slabs feature an R11 slip resistant surface, making them suitable for patios, garden pathways, and outdoor living areas where safety is important.\u003c\/p\u003e\n\n    \u003ch4\u003eDo porcelain paving slabs require sealing?\u003c\/h4\u003e\n    \u003cp\u003eNo. Porcelain paving is non porous and does not require sealing. This makes it easier to maintain compared with many natural stone paving materials.\u003c\/p\u003e\n\n    \u003ch4\u003eWhat size are Hammer Stone Grey porcelain paving slabs?\u003c\/h4\u003e\n    \u003cp\u003eThese paving slabs are supplied in a 900x600mm format, which is one of the most widely used slab sizes for modern patio installations.\u003c\/p\u003e\n\n    \u003ch4\u003eAre porcelain paving slabs easy to maintain?\u003c\/h4\u003e\n    \u003cp\u003eYes. Porcelain slabs require minimal maintenance. Occasional cleaning with water and brushing is usually sufficient to keep the patio surface clean.\u003c\/p\u003e\n\n    \u003ch4\u003eWhere can Hammer Stone Grey porcelain paving be used?\u003c\/h4\u003e\n    \u003cp\u003eThese slabs are ideal for patios, garden seating areas, walkways, terraces, and landscaped outdoor spaces in both residential and commercial environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Paving and Slabs","offers":[{"title":"Default Title","offer_id":47670240149758,"sku":"PS-HSG","price":479.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0752\/3647\/5134\/files\/HS_Grey_Paving.jpg_202606041553.jpg?v=1780576367","url":"https:\/\/pavingandslabs.co.uk\/products\/hammer-stone-grey-paving-slabs","provider":"Paving and Slabs","version":"1.0","type":"link"}