Perryfield Basebed
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Description
Perryfield basebed is a tightly grained stone with very little shell content, similar in looks to the Whitbed, but with a slightly more buff colour.
It is suitable for most applications as a general building stone, but not recommended in exposed areas such as paving and copings.
Carvers regard this Portland stone due to the low shell content and is used primarily as a monumental stone.
Basebed is frequently being used internally for paving in both high quality office developments and private residences.
Unlike all the other Portland quarries where beds of 1 metre high or more are the norm, the bed heights for basebed are 550mm high maximum.
We have extensive stocks of this stone with blocks typically from 1 tonne upwards to 8 tonnes.
Petrography
Portland Oolitic Limestone
Principally formed from micritic ooids in a sparse micritic matrix, the stone contains many shell fragments in the size range 1mm to 5mm. Some compaction of the ooids is present but the matrix exhibits moderate intergranular porosity with interlinking of pores. No clay or other minerals are apparent.
Durability & Weathering
Perryfield Whitbed is known to be a durable building stone and has been used extensively within the United Kingdom and in Belgium. It exhibits a low saturation coefficient, good strength and resistance to salt.
Historic use indicates that it is capable of service life well 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 surface 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.
Physical Characteristics
Colour: Buff/White Texture: Medium to Fine Grained
Sizes Available:- Maximum Typical Range
Bed Height: 600mm 400mm – 550mm
Length: 1400mm 500mm – 1200mm
Block Size: 4.0 m3 0.40 m3 – 3.5 m3
Please note that limestone is a natural material and is subject to variations in colour, pattern and/or texture.
Only full bed height samples each numbered and acknowledged by all parties involved could be considered contractual.
To that end it is essential that a visit to our quarries to select the range required is advised.