• The Cwt-y-Bugail slate quarry in Ffestiniog, North Wales has been producing slates from 1840, and is currently the highest industrial site in the UK
  • Cwt-y-Bugail is now an open cast quarry although originally the quarry was mined
  • During World War 2, many of Britain’s most valuable paintings were secretly stored in its caverns for safe-keeping!
  • Cwt-y-Bugail roofing slates are a blue/grey colour and have a distinctive texture which makes them highly sought after, and also popular as an architectural material
  • Cwt-y-Bugail roofing slates come in standard sizes of 50x25cm (other sizes are available on request), and in 3 thicknesses:
    • Capital grade (5.5mm nominal thickness)
    • County grade (7.5mm nominal thickness)
    • Celtic grade (9.5mm nominal thickness)
  • Cwt-y-Bugail slates conform to BS EN 12326-1: 2014 (W1, S1, T1), hold BS Kitemark accreditation and are generally expected to outlive the life of a building
  • These slates have a lifespan measured in centuries and include a 100 year guarantee

Product Detail

Kinsale Signal Tower Cwt Y Bugail Slate

Welsh Cwt-y-Bugail Slate Cladding

This is one of the most unusual and visually striking Irish building restorations that LBS have supplied. The Old Head of Kinsale Signal House on the Cork coast has, in 2015, been reborn as a Museum a…

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Colour and Finish Blue Grey
Available in Sizes 500 x 300mm (Other Sizes on request)
Available in Grades Celtic, County and Capital
Nominal Thickness Celtic 9.5mm, County 7.5mm, Capital 5.5mm
Minimum PItch 22.5 deg for standard 100mm h/lap *normal exposure only*(for pitches below 22.5 deg please consult LBS Technical Dept)
Maximum Headlap All LBS slates are holed for 100mm head-lap
Alternative Headlaps For availability and advice please contact LBS
Gauge 200mm for slate pre-holed for 100mm head-lap
Batten Size Please refer to BS 5534 or SR 82:2017
Nails Copper, Aluminium or Silicon Bronze
Slate Dimensions/ Grade 500x300mm Celtic Grade 500x300mm County Grade 500x300mm Capital Grade
Weight per sqm Laid (kg) 53.62 46.98 37.01
Slates per sqm at 100mm h/lap 16.6 16.6 16.6