Penrhyn Strike (1900-1903)

Also known as Great Strike of Penrhyn · Penrhyn lock-out · Penrhyn dispute

A three-year strike and lock-out at Penrhyn slate quarry in Wales, often called the longest dispute in British industrial history.

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Cite this entry"Penrhyn Strike (1900-1903)." roof.wiki. https://roof.wiki/penrhyn-strike/ (accessed 2026-11-02).
Began
22 November 1900
Ended
November 1903
Location
Penrhyn Quarry, Bethesda, Wales
Workforce affected
Nearly 3,000 quarrymen

The Penrhyn strike, also known as the Great Strike of Penrhyn, was a dispute between the quarrymen of Penrhyn slate quarry near Bethesda, north-west Wales, and the quarry owner, Lord Penrhyn. It began on 22 November 1900 and lasted three years, ending in November 1903. It is often described as the longest dispute in British industrial history.

head lap Rafter + battens Slates hang in courses from the eave up.Each is nailed (or hooked) to a batten andreaches two courses up, so there are alwaysat least two thicknesses over the roof.
How slates are fixed

Background

At the end of the 19th century Penrhyn was the largest slate quarry in the world, employing nearly 3,000 men. Welsh slate output had peaked in 1898, but the industry was exposed to falling prices and competition. This is described as the second strike at the quarry, indicating earlier conflict between owner and workforce.

The dispute

The conflict is described in some sources as a strike and in others as a lock-out, reflecting disagreement over which side began it. Its three-year length meant prolonged loss of earnings for quarrying families in Bethesda and the surrounding area.

Outcome

The workers returned in November 1903 on terms set by Lord Penrhyn.

Effect on roofing

The dispute disrupted supply of Welsh roofing slate just as builders had growing alternatives, including clay tiles, imported slate and, soon after, cement-based and asphalt products. Historians see it as marking the beginning of the industry's long decline. After 1903 a wider depression brought pay cuts and job losses, and eight Ffestiniog quarries closed between 1908 and 1913.

Pans (concave) are laid first and carry the water.Covers (convex) sit over the joints between them.Each course overlaps the one below up the slope.
How pan and cover tiles shed water

Remembrance

The strike remains an important event in Welsh labour history and is interpreted as part of the Slate Landscape of Northwest Wales World Heritage Site.

Sources

  1. Penrhyn QuarryWikipedia · en.wikipedia.org
  2. Slate industry in WalesWikipedia · en.wikipedia.org