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This data sheet describes Westmorland Green Stone which is quarried in the English Lake District. Westmorland Green Stone has been used for generations to provide walling, flooring, roof coverings, cills, copings and landscape products. Architects and Designers around the world have long taken advantage of its natural beauty, durability and adaptability to create classic weather resistant details and surface finishes. The richness of Westmorland Green Stone makes it ideal for traditional or modern design schemes.
Performance characteristics
Density: 2770 kg/m3
Structural and Mechanical: Westmorland Green Stone has high abrasion resistance, compressive strength, flexural strength and modulus of elasticity. Elterwater stone also has good slip resistance making it suitable for flooring and exterior paving.
Fire: Westmorland Green Stone is non-combustible.
Gases and liquids: Westmorland Green Stone has good weather resistance, it passes both the water absorption and the wetting/drying tests described in BS 680: Part 2. It is nonporous and will not delaminate in use, it is also resistant to atmospheric pollution, acid and sea spray and is unaffected by common chemicals.
Biological: Westmorland Green stone will not rot, does not encourage growth of mosses or lichens and is not liable to insect or vermin attack, it is compatible with most other building materials.
Thermal: The thermal conductivity of the material is approx. 2.0 W/mK, it is dimensionally stable, with a thermal coefficient of expansion of 10.4 x 10-6.
Storage: Burlington stone is an inert material and inherently safe if handled with due caution.
- Safe lifting techniques should be used.
- Protective clothing should be word.
- Wear eye protection.
- Dust arising from dry machining contains silica, which can be a long-term health hazard if inhaled in significant quantities for extended periods, use a suitable dust mask.
Maintenance: Burlington Stone is a naturally durable material which requires very little maintenance.
Supply: At current rate of extraction the quarry has reserves in excess of 70 years.
Test Results:
Abrasion resistance*: (Test - C241-85) 13.55
Compressive strength: (Test - BSEN 1926) 113 Mpa
Modulus of rupture: (Test - C120-85) 53.234 Mpa
Modulus of elasticity: (Test - C120-85) 59432.83 Mpa
Flexural Strength: (Test - BS 13161) 45.09 Mpa
*Calculated as the reciprocal of the volume abraded multiplied by ten.
Water absorption (parallel): (Test - BS EN 1925) 0.187 gm2s0.5
Water absorption (normal): (Test - BS EN 1936) 0.218 gm2s0.5
Open porosity: (Test - BS EN 1936) 0.1%
Acid resistance: (Test - C217-85) 0.20 mm
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