The thickness and heavily riven surfaces of the Stoneleaf Celtic Grey Roofing Slate results in a roof finish that has texture, depth, and character. Hand split from premium quality Grade 'A' rock, formed 400 million years ago during the Ordovician period, the same time as Ffestiniog Welsh Slate.
 
Increasingly the preferred choice of specifiers, developers, private homeowners and conservation officers, the Celtic Grey adds character and charm to the most prestigious properties.
 
At approximately 54 kg/m2 when laid, it is far heavier than many other roof slate finishes, making it less liable to wind damage.