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The Stoneleaf Maenofferen slate is quarried
in the home of natural slate, at Blaenau Ffestiniog.

The Stoneleaf Maenofferen is a blue grey natural roof slate with a textured surface, often with characteristic transverse bedding lines. Historically the slates were mined underground in an extensive system of tunnels and chambers, however following extensive development works at the quarry they are now quarried by the open cast method.

Sizes produced range from 10"x6" up to 24"x14", however production is very much determined by the size of block that is available, and this does vary. Generally production is geared towards 20"x 10" and smaller, however larger sizes can be produced in very limited numbers. Random diminishing slates can also be made.


Maenofferen Quarry, Blaenau Ffestiniog, North Wales
Approx Thickness:
Blue Grey
Textured with occasional transverse lines
Bests and Seconds
Slates are supplied pre-holed to customers' specification
Slate and a Half:
Available un-holed
Approx Weight:
38kg/m2 based on 20"x 10"mm laid to 75mm lap

Guarantee: 100 year site specific guarantee available upon request

BS EN 12326-1:1:2004 Test Results: Water Absorption A1, Thermal Cycle T1, Sulphur Dioxide Exposure S1

Interested? 01277 841 555 |