• Cwt-y-Bugail slates have a distinctive dark blue/grey colour and attractive riven texture which make them highly sought after.
  • The Cwt-y-Bugail quarry in Ffestiniog, North Wales has been producing slates since the mid 19th century
  • The quarry is renowned worldwide for both its roofing and architectural slate
  • During World War 2, many of Britain’s most valuable paintings were secretly stored in its caverns for safe-keeping!
  • Cwt-y-Bugail slates come in standard sizes in 3 thicknesses:

- Capital grade (5.5mm nominal thickness)

- County grade (7.5mm nominal thickness)

- Celtic grade (9.5mm nominal thickness)

  • BS EN 12326-1: 2014 (W1, S1, T1) certified
  • BS Kitemark certified
  • These slates are generally expected to outlive the life of a building and have a life expectancy measured in centuries
  • Backed by a 100 year guarantee
  • We offer an Accredited CPD Seminar on 'Welsh Slate as a Roofing Material' - Book Now
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Price available on enquiry


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