UNITED KINGDOM ROOFING SLATES
(1) Alfred McAlpine Slate (Wales) incorporating:
Penrhyn Heather/Blue (Bethesda Quarry) - This slate has been quarried at Bethesda for more than 400 years and is produced from the Cambrian slate deposits of Gwynedd, North Wales, acknowledged as one of the finest slate deposits in the world.
Ffestiniog Blue/Grey (Oakeley/Glodfa Ganal Quarry) - the rectangular stones are cleaved from 500 million year old Ordovician slate beds to produce natural roofing slates. The slates have a smooth, extremely fine grained texture and are unfading mid-shade blue/grey in colour.
Ffestiniog Dark Blue/Grey (Cwt-y-Bugail Quarry) - cut from Ordovician slate beds, these slates are extremely fine grained and are of probably the most uniform, unfading dark blue/grey colour available. The finished roofing slate has a natural curvature which facilitates the fixing.
(2) Greaves' Quarry (Welsh Portmadoc)
Mid Blue/Grey - again cut from rock from the Ordovician period, these slates have a smooth, fine grained texture and are unfading mid-shade blue/grey in colour, identical to Oakeley slates as described above.
(3) Burlington Slate Quarries (Cumbria)Producing Burlington Blue/Grey and Westmorland Light Sea Green and Olive Green natural roofing slates
The extraction of slate from Burlington Quarries in the English Lake District dates back over 300 years, evolving from a small independant cottage industry to a combined unit forming the Burlington Slate Quarries.
The slate quarried by Burlington was formed during two Palaezoic eras: blue/grey slate, a metamorphosed sedimentary rock approximately 330 million years old, was formed in the Silurian Period whereas the Westmorland Green slate is the product of metamorphosed volcanic ashes approximately 500 million years old, the green colour created by chlorites.
Available in sized, patterned and random slates, 24" to 12", 8mm to 20mm in thickness, selected and graded into seperate ranges of thickness.
We are also distributors of secondhand Westmorland Green roofing slates.
