Grey Limestone Hearth Slab | 1200×380×20mm

Direct-from-quarry Grey Limestone (1200 x 380 x 20 mm). Engineered with a calibrated 20–24 mm nominal thickness, a tactile fine-textured surface, and crisp, machine-sawn edges. Sophisticated mid-to-light grey tones with subtle natural variation and character. Part of our Grey Limestone range and our Limestone Hearths range. This front hearth section pairs with a matching chamber section — see 900×450mm or 900×600mm.

Highlights

• Calibrated 20–24 mm Nominal Thickness: Precision-calibrated to ensure a flat, consistent bed height for quick, seamless installation and level bedding.
• Textured Sawn Finish (Tactile Orange Peel Feel): Smooth natural texture with a modern straight-cut, sawn edge profile.
• Machine-Sawn Edges: Precision-cut 4-side sawn edges provide crisp, clean lines for seamless jointing and a sharp, architectural frame around your stove or insert fire.
• 14-Day Crack Guarantee: If your slab cracks within 14 days of delivery (provided it is installed within that same 14-day window), we'll replace it completely free.
• Free Photo Service: Every premium-grade order includes a free dispatch photo of your exact slab sent straight to you before delivery. Standard-grade slabs also include this service whenever a custom cutting or finishing service is added.
• Order a sample: Choose up to 2 free samples for a flat £5 delivery fee. See the texture and quality in person before committing to a full slab. Order your sample

Engineered with a calibrated 20–24 mm nominal thickness, a distinctive fine-textured surface, and machine-sawn edges, this high-grade grey limestone delivers exceptional structural density and thermal performance. Purpose-designed as the front hearth section of a T-shape hearth set, or as a standalone hearth in its own right, for luxury fireplace hearths, stove pads, window sills, and interior architectural steps where you need clean geometry and reliable durability. Available nationwide as single slabs, bespoke cut-to-size pieces, or full wholesale crates for trade buyers across the UK.

• Dimensions: 1200 x 380 mm (+/- 2mm)
• Thickness: 20–24 mm nominal (Calibrated)
• Weight: Approx. 26 kg per slab
• Surface Finish: Tactile, matte fine-textured ("orange peel" feel)
• Edge Finish: 4-side machine sawn cut
• Colour Profile: Sophisticated mid-to-light grey tones with subtle natural variation and character
• Flexural Strength: 24.69 MPa (56 Freeze-Thaw Cycles)
• Water Absorption: 0.04% (Ultra-Low Porosity & Exceptional Frost Resistance)
• Slip Resistance: PTV 73 (Dry) / PTV 57 (Wet)

If your slab cracks within 14 days of delivery (provided it is installed within that same 14-day window), we'll replace it completely free.

Every premium-grade order includes a free dispatch photo of your exact slab sent straight to you before delivery. Standard-grade slabs also include this service whenever a custom cutting or finishing service is added.

Need custom cutouts, tailored edge profiles, or surface pre-treatments? See how our cutting, finishing, and sealing services work for slate and limestone.

• Flexible Quantities: Buy individual slabs for precise cut-to-size hearth work, or full crates for trade project savings across the UK.
• Nationwide Logistics: Direct-to-site delivery via 3rd-party nationwide pallet networks. Offloaded by tail lift and delivered kerbside.
• Customer Quotes: Call 01908 46 46 56 or email drawings to sales@blueskystone.com