WELSH SLATE

PENRHYN QUARRY
BETHESDA
BANGOR
GWYNEDD LL57 4YG

Tel: 01248 600656
Fax: 01248 601171

Company Logo

Suppliers of: Roofing slates, Slate cladding, Slate paving, Walling, Sills and copings, Landscaping, Aggregates, Slate tiles for flooring, Fire surrounds/hearths, worktops/counters

Welsh Slate is the world’s leading supplier of high quality slate and supplies the UK construction market with highly durable roofing slates, facade cladding, slate paving, walling, sills and copings.  For internal projects, Welsh Slate manufacture and supply slate tiles for flooring, fire surrounds, bespoke kitchen worktops and counters.

COVID-19 UPDATE: We are open for business as usual and look forward to receiving your enquiries.

Environmentally Responsible

Welsh Slate’s Penrhyn quarry has been supplying slate worldwide since the 13th Century and has a long tradition of being specified by architects, and our client base also includes leading developers and interior designers. As a result of our work we are committed to conducting our business in an environmentally responsible manner by minimising the environmental impact and promoting sustainable development within its operations and services.

CPD Seminar

This seminar is designed to help architect and specifiers to understand the manufacturing process and the potential applications of Welsh Slate as a building material. It will explain the advantages and problems with slate and clarify the difference between differnent slates from around the world. The presentation will inform delegates of the variety of applications for Welsh Slate and provide information on the standards, accreditations, classifications and fixing methods.

CPD Factory Tour

The two hour tour will demonstrate the current slate quarrying and production processes while in addition giving you some hands on experience of working with a natural product. For enquiries or to arrange a CPD please telephone our sales office on the telephone number above or alternatively click here and fill out an enquiry form.

Our wide range of products include:

Roofing Slate

Welsh slate is proven to out last any other roofing material and is guaranteed to have a productive life in excess of 100 years. Colour variants are available and can be supplied up to 1.2 meters wide.

External Slate Paving

Welsh slate is available in a range of thicknesses from 30mm to 100mm and a variety of colours and textures to suit any application. Slate paving is frost-resistant and slip resistant certified to BS EN1341:2001

Welsh slate is weather and waterproof, unaffected by atmospheric pollution, sea air and organic growth and is colour-fast and non-fading, even in UV light. Certified and tested to BS EN 12326 - 1:2004

Welsh Slate Flooring

Welsh slate is a hard wearing natural floor tile for use in both domestic and commercial applications. The material is highly durable and easily maintained. As an unpolished floor tile Welsh slate is slip resistant to BS EN 1341:2001.

Facade Cladding & Masonry

Welsh slate facade cladding is ideal for use on either internal or external cladding products and is an ideal material for use on ventilated rainscreen cladding. Welsh slate masonry units are available in course heights of up to 180mm and to random or specified lengths with pillared or sawn face.

Our facade cladding is supplied to bespoke sizes and has been installed in diverse applications such as public buildings and churches to industrial and commercial developments and residential properties.

Stone Walling

Welsh slate makes an ideal walling product and is available as either quarried rustic walling with a naturally exposed face or as a smooth faced pillared walling face.

Sills & Copings

Welsh Slate can supply bespoke slate sills and copings for both refurbished and new-build commercial and residential properties and are available from stock and to order.

Aggregates and Landscaping

Slate aggregate has many outstanding technical properties. Welsh slate is available as a decorative aggregate in three colours. Our slate aggregate is also supplied for use in precast and ready-mixed concrete, road building and civil engineering.  Slate granules are used to produce bituminous roofing felts and artificial slate roofing tiles. We also supply Slate feature landscaping stones and monoliths.

Slate Fire Surrounds and Hearths

Welsh slate is the ideal stone for fire surrounds and hearths for solid fuel and wood burning stoves as well as open fires. Bespoke to your specific requirements, these fittings can be supplied in a range of colours, finishes and edge detail.

Slate Kitchen Worktops & Counters

Welsh Slate makes a beautiful and practical material for worktops and counters, combining very low liquid absorption levels with a luxurious warm feel to the hand.  The material is supplied as a completed wipe-clean slate worktop to consumers and contractors’ projects or as unfinished or polished scant to worktop manufacturers.

Further technical information, image galleries and product specifications are available through the Welsh Slate website or via the BPi Download Library.

ACCESS FLOORING Slate .
AGGREGATES Landscaping .
AGGREGATES Slate .
ARCHITECTURAL Stone Slate
CILLS Slate .
CILLS Slate Welsh Slate
CLADDING TILES Stone Slate
CLADDINGS and FACINGS See CLADDINGS EXTERNAL: .
CLADDINGS EXTERNAL Cut Facing Stone Slate
CLADDINGS EXTERNAL Fire Proof Non Combustible
CLADDINGS EXTERNAL Fire Resistant .
CLADDINGS EXTERNAL Fire Resistant EN 13501-1 .
CLADDINGS EXTERNAL Fire Retardant BS476 Class 0
CLADDINGS EXTERNAL Riven Slate Surface .
CLADDINGS EXTERNAL Slate .
CLADDINGS INTERNAL Riven Slate .
CLADDINGS INTERNAL Slate .
COPINGS Slate .
COPINGS Slate Welsh Slate
CRAZY PAVING Slate .
DRY STONE WALLING Slate .
FABRICATIONS Slate .
FIRE SURROUNDS . .
FIRE SURROUNDS Natural Stone Welsh Slate
FLAGSTONES Slate .
FLOORING Natural Stone Flooring .
FLOORING Natural Stone Flooring BS EN 12058 CE Marked
FLOORING Riven Slate .
FLOORING Slate Flooring .
GARDEN Aggregates Gravels, Slate
HEARTHS AND BACK PANELS Welsh Slate Hearths .
KITCHEN WORKTOPS . .
KITCHEN WORKTOPS Curved Worksurfaces .
KITCHEN WORKTOPS Natural Stone .
KITCHEN WORKTOPS Slate Welsh Slate
LANDSCAPING Aggregates .
LANDSCAPING Paving .
PAVING SLABS Patio Natural Slate .
PAVING SLABS Riven Slate .
PAVING TILES Welsh Slate .
RAINSCREEN SYSTEMS Slate .
ROCKERY STONE Slate .
ROOF VENTILATORS Flush Slate .
ROOF VENTILATORS Welsh Slate Bat Access Units
ROOFING Slate .
ROOFING SLATES . .
ROOFING SLATES BS EN 12326 CE Marked
ROOFING SLATES Natural Stone .
ROOFING SLATES Natural Stone ASTM S1 Classified
ROOFING SLATES Natural Stone BS 5534
ROOFING SLATES Natural Stone BS EN 12326-1 CE Marked
ROOFING SLATES Natural Stone BS EN 12326-1:2004 A1-S1-T1
ROOFING SLATES Natural Stone Heavy Slate
ROOFING SLATES Natural Stone Heritage and Conservation Applications
ROOFING SLATES Natural Stone Heritage and Conservation Applications England
ROOFING SLATES Natural Stone Heritage and Conservation Applications Scotland
ROOFING SLATES Natural Stone Heritage and Conservation Applications Wales
ROOFING SLATES Natural Stone Low Pitch Roofs
ROOFING SLATES Natural Stone Welsh Slate
ROOFING SLATES Roof Weathering Slates .
ROOFING SLATES Strip Slates .
ROOFING SLATES Ventilator .
SLATE Flooring .
SLATE Paving .
SLATE Rustic .
STONE FLOORING See Also FLOORING: Natural Stone Flooring .
TILES, FLOOR Riven Slate .
TILES, FLOOR Slate .
TILES, WALL Slate .
WALLING Riven Face .
WALLING Sawn Face .
WALLING Slate .
WALLING Slate Pillared Slate
WALLING Slate Welsh Slate
WINDOW SILLS See Also CILLS: .
WORKTOPS Welsh Slate .

Welsh Slate Weighbridge Christmas 2020 Opening Hours

December 2020

WEIGHBRIDGE CHRISTMAS 2020 OPENING HOURS
Posted December 2, 2020 by Julie

PENRHYN

Final roofing & architectural collections 18 December, 4:00pm

Final aggregates collections 21 December, 4:30pm

FFESTINIOG

Final aggregates collections 21 December, 4:30pm

Final minerals collections 18 December, 4:30pm

WELSH SLATE CUSTOMER SAYS SMALL = BEAUTIFUL

December 2020

Posted November 27, 2020 by Julie

Walter Verhoeven BV celebrates 140 years in business.

Dutch roofing company Walter Verhoeven BV has worked with Welsh Slate for all its 140 years, but it was only this year that contractor’s employees got to see the manufacturer in action.

Managing director Wim Verhoeven flew his brother Thom and 21 other colleagues over in February for a 140th anniversary two-day trip to the UK, one of which was spent visiting Welsh Slate’s main Penrhyn Quarry in North Wales.

Here they witnessed the full production process, from rock face, through sawing, splitting and dressing. Some even tried their hand at splitting the premium Penrhyn Heather Blue slate themselves.

The visit brought home the differences between the slate sector in the UK and The Netherlands where roofing slates are typically almost half the size of British slates – 300mm x 200mm (12” x 8”) or approximately 45/m2, and seldom longer than 350mm/14”, compared to 500mm by 250mm (20” x 10”) or approximately 20/m2.

The reason for this is twofold. Firstly, slate production in the north-east of Belgium and Northern Europe was predominately in small sizes, due to the material’s inferior quality. So, the architectural style developed to accommodate these small slates which could be incorporated into complex roof designs not feasible with the larger slates sold in the UK. Hence the proliferance of steep roofs and mansards on the North European mainland.

Secondly, small slates were produced in Wales as a by-product of the manufacture of the more familiar, larger slates, so were both readily available and sold at a comparatively low price, as there was no market for them in the UK.

The small size of slates used in The Netherlands also impacts their fixing method. This relies on hooks rather than double-nailing each slate, a process that is approximately 10% quicker, at five to 10 minutes/m2, than the UK process.

Walter Verhoeven is a family business and now run by Wim and Thom, the fourth generation. But Welsh Slates have been shipped to the low countries of Europe since the 13th Century.

The big growth in sales to these areas, due to the durability of the superior Welsh Slate product, corresponded with the massive growth of the Welsh Slate industry from the end of the 18th Century to its height in the late Victorian period of the 1880s.

Their team of up to 18 craftsmen has used hook fixings on small Welsh slates on more than a thousand buildings in The Netherlands.

Now specialists in slate, and zinc, lead and copper roofing, 90 to 95% of their work comprises the re-roofing of heritage buildings such as chateaux, churches, cathedrals, castles, monasteries and civic buildings (which the Dutch Government pays grants towards), with new-build houses, shopping centres and business premises making up the remaining five to 10%.

To work on heritage buildings in Holland, there is a preference for roofing contractors who are certified for disciplines like slate and metal roofing and Walter Verhoeven BV is proud to have had all these certificates since they were introduced.

While their employees do not have to complete a seven-year apprenticeship to become a Master Slater, such as in Germany, the company takes such pride in its own heritage expertise that it will turn down contracts where the brief is not for a quality job.

Currently, Walter Verhoeven is re-roofing a villa that was only built 11 years ago but where the Chinese slate roof has already failed due to poor materials and workmanship.

Poor-quality projects are increasingly the case, with many heritage buildings such as churches being forced to close due to lack of visitors and therefore income. These are then being converted into apartments or commercial/retail units by developers who not always want to invest in a re-roof or are happy to only pay for a cheap, and therefore sometimes inferior job.

Two heavily-detailed projects Walter Verhoeven is particularly proud of was the re-roofing, with 400m2 of Welsh Slate’s Penrhyn Heather Blue slates, of a castle with 16th Century origins in Berlicum which was being converted into a private home, and the re-roofing, with 700m2 of Cwt-Y-Bugail slates, of an enormous 100-year-old villa in Helmond.

Wim said: “We like to work with Welsh Slate as it is the best quality and easily lends itself to the complex roof structures we work on. The colours and structure of the Welsh slate are very nice and they have proven their quality over the years.”

This work ethic is already apparent in potentially the fifth generation – Thom’s 19-year-old son who already has metal roofing qualifications and is now into his second year working with slates, alongside a colleague who has worked for the company for 32 years.

It’s all a far cry from the early days when the business was set up by the brothers’ great-grandparents. Wim and Thom’s parents combined roofing with the installation of gas, water and plumbing in houses but that side of the business was divested almost 20 years ago when it could not compete against the growing number of sole traders. Then, slate comprised 40% of the business. Now it is almost 80%.

Looking to the future, Walter Verhoeven employs two apprentices who were looking to start college just before the country went into lockdown, on a training scheme that had been restored after it shut down during the 2008 recession. Now they hope to start this month (November), COVID permitting.

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