Technical Data
Grinshill stone has been tested for compressive strength and bulk density, as well as
being subjected to the appropriate durability tests stated in BRE Report 141
(Durability Tests for Building Stone). However, no test method has been found to
match the test of time and Grinshill stone has proved itself durable over many
centuries.
PERFORMANCE |
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Sandstone: |
'White' |
'Red' |
Compression strength: |
27 N/mm2 |
24 N/mm2 |
Acid immersion test: |
Passed |
Passed |
Porosity: |
18.5% |
18.5% |
Saturation coefficient: |
0.81 |
0.89 |
Thermal conductivity: |
0.0? W/mK * |
0.0? W/mK* |
Acoustic value: |
1 92.7 kg/m2* |
1 92.9 kg/m2* |
Durability
As natural waters in the stone dissipate
through evaporation or capillary action to the surface, they precipitate the siliceous content as a crystallised outer cover. The stone develops this outer patina over a period of time and is considered 'seasoned' after several years. This sealing of the surface skin adds to the inherent durability of the stone.
* Based on a 100mm thick block
customers to the quarries at Grinshill to see the stone in its natural state and discuss specific projects.
