Portmadoc Roof Slates – WELSH

Portmadoc Roof Slates (Welsh)

Killoran Slate Quarry: portmadoc slate

Portmadoc Slate (Welsh)

Portmadoc Welsh grey slates were quarried near Ffestiniog in North Wales. They were shipped from Port Madog hence the name. The slates have a flat surface and are blue/grey colour. Most were sized slates 20×10, 20×12, 22×12, 24×12 and 24×14.

Although producing large quantities, Welsh Portmadoc slates suffered two main disadvantages, compared to Welsh Bangors, as far as the Irish market was concerned. Firstly their blue/grey colour was very close to the Irish quarries producing blue/grey slates such as Binn Dubh, Roscarbery, Cork,  Ahinney at Carrick-on-Suir, Tipperary and Convoy, Donegal. Secondly the port at Portmadogh was not proximate to the Liverpool -Dublin shipping lane in comparison to the port of Bangor on the north coast of Wales.

The picture on the right shows the re-roof of King House in Boyle Co Roscommon which we supplied in the 1980’s.
Another outstanding and beautiful example is the Royal Hospital in Kilmainham Dublin which was re-roofed in the late 1970’s with Greaves Portmadoc slates.

King House, Boyle Co Roscommon.

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