Dunhouse Blue
Fine grained blue/grey sandstone. Excellent for paving/steps and areas of severe exposure.
Extracted in Lancashire this blue/grey sandstone has a very fine grain and is extremely durable due to its high strength and low porosity.
Dunhouse Blue is therefore an excellent material for paving, steps, plats, copings etc, or in fact any stone in an exposed position.
It was the ideal choice for Historic Scotland when choosing a stone for the spitters for the restoration of the Great Hall Stirling Castle as these stones are exposed to the weather and are designed to carry rainwater without a lead flashing to protect them.
Dunhouse Blue can also be used as ashlar and can carry a highly polished finish.
Applications:
Ashlar walling
Thin cladding Fischer type system
30mm min
Dressed / Carved stone
Rock faced walling
Rubble walling
Rockery stone
External flooring / Paving
External steps / Platts
Excellent
Internal flooring (requires sealant)
Specification:
Density (kg/m3)
2572
Compressive Strength (N/mm3)
145
Absorbtion (%)
1.13
Saturation Coefficient
0.87
Porosity (%)
3.33
Acid Immersion test
pass
Salt Crystallisation (%)
+0.04
Flexural Strength (dry/perp)(N/mm2)
n/a