Our principle source of material is that of Barnhill Quarry. A 10 hectare site within the Barnhill plantation in Broadwell, Forest of Dean. As the crow flies the quarry is just one mile from our works at Parkend, sitting atop the Cannop Valley.
Forest of Dean sandstone is a Carboniferous Pennant sandstone. It is Blue to Grey / Green through to Brown in colour.
Technical data including performance properties and CE marking is available on our Technical Specification page.
The Quarry is worked on two levels. From the upper beds we extract a mixed colour Pennant sandstone which is naturally Blue with oxide colouration producing Grey/Green and Brown tones. The lower beds are predominantly Blue and it is from these beds that we produce our flame textured product.
Starting at the Free End where the quarry is ‘open’, our team strip along the face. They remove what is termed overburden in order to reach the beds of Pennant sandstone. Once they have identified the bed they start the extraction process, cutting the block out.
We use the Stitch Drilling & Splitting method to extract our stone rather than the more familiar blasting process often associated with quarrying. We do this for a number of reasons; it gives us a cleaner break, it is more environmentally friendly and it’s safer. Blasting can cause micro fractures within the block which increases the chances of it splitting when we cut into it.
Thanks to improvements in technology and investment by our Board of Directors we now extract two blocks every five minutes.
Our bed heights are generally between 600cm – 1m high but they have been known to go as high as 1.2m!
These blocks are split into random sizes weighing 10 tonnes. This is our maximum lifting capacity at the stoneworks.
The colour of the block is random as our beds are not uniform. Some are one solid colour, others are mixed, from blue to grey/green with brown markings. The outer and inner core can often be different colours.