Glendyne Natural Slate

Glendyne slate is approved for use in the Snowdonia National Park, home of the Welsh slate industry.

Glendyne natural slate is certified for use in Snowdonia National Park and, because of this, you will find Glendyne slates specified on projects where quality and consistency are key. Glendyne slates present a natural blue/grey hue, very similar to Welsh slates.

Glendyne slates are unaffected by oxidising metallic inclusions, clays, carbonates or weaker seams – Glendyne natural slate are the pinnacle of premium grade slates, at a significantly lower price point than Welsh slate.

To ensure quality standards are met, the Glendyne quarry meticulously sort through all production and select only the best slates from the extracted rock. Due to this fine selection process, the end product is uniform, flat and of the highest quality. Glendyne slate is guaranteed for 75 years.


Glendyne is classified in accordance with BS EN 12326 EN 13501-1 and is deemed to be fire rated, A1 non-combustible

Structurally Similar to Welsh Slate

This high performance, blue/grey Welsh slate is no longer available, but an equivalent alternative is regularly required.

Approved in Snowdonia National Park

A suitable alternative in the home of Welsh Slate, Glendyne is often selected for heritage buildings, monuments and conservation areas.

Guaranteed for 75 Years

Glendyne is categorised as an S1 slate to ASTM C406. With an expected service life in excess of 75 years. Peace of mind on a roof.

Unaffected by pyrite

No rust marks, streaks or discolouration. No premature product failures.


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