Portland limestone Perryfield shelly whitbed
Perryfield shelly has a slightly open texture and is described as a shelly stone. It does not have the openness of Roach.
Exceptionally durable due to the high shell content and as such can be used in more exposed areas. The high shell content increases its durability but reduces its suitability for heavily detailed or carved work. Instead the Portland stone is used for ashlar, paving and copings.
We have sufficient extracted stock for most projects.
Sizes Available: – Maximum Typical Range
Bed Height: 600mm to 1,100mm
Length: 800mm to 2,300mm
Technical data
Perryfield shelly whitbed exhibits a low saturation coefficient, good strength and good resistance to salt. Test results indicate that it is capable of a service life in excess of 60 years providing that exposure conditions are not subject to severe frosts or high concentrations of sulphur dioxide and that good stone detailing methods are employed to give best protection from water ingress.
It is estimated that the likely weathering rate of this stone would lie between 1mm to 3mm per 100 years in normal exposure conditions.
Variation
Please note that limestone is a natural material and is subject to variations in colour, pattern and texture. It is therefore essential that you visit our quarries to select the range required. Only full bed height samples, each numbered and acknowledged by all parties involved, could be considered contractual.