Roofing specialist Cembrit is now offering a 75-year durability guarantee for its Glendyne natural slate range.
Glendyne is a high-quality slate that combines performance with the beauty of natural slate. Available exclusively from Cembrit in the UK, Glendyne is a distinctive blue-grey colour.
Ged Ferris, Marketing Manager for Cembrit, commented: “Free from oxidising metallic inclusions, clays, carbonates or weaker seams, the natural strength of Glendyne is enhanced by selection techniques that choose the best quality rock to produce the finest, most durable roofing slates.
“Amongst the test regimes that Glendyne slates are submitted to is the north American ASTM C406, which classifies roofing slates into three grades: S1, S2 and S3. Slate grades are intended as a prediction of the slates expected service life: Grade S1 slate has an expected service life of more than 75 years. The combination of such laboratory test results and practical experience of using Glendyne slates for a couple of decades, gives us the confidence to guarantee Glendyne slates for 75 years.”
The Glendyne quarry operates a quality management system based on EN ISO 9001, which is externally audited. This standard is adhered to rigidly, as are all quality standard procedures required by each regional market the quarry supplies. Glendyne is tested to BS EN European standard, BS EN 12326-1:2014 which requires many of the laboratory tests (‘type testing’) to be performed at least annually and the factory production control (FPC) performed and recorded as a matter of routine by the producer.
Cembrit offers its Glendyne natural slates in four sizes, having recently added two new imperial sized slates to provide roofers with more versatility when working on lower pitched roofs. The larger sized slates – 610 by 305mm and 508 by 305mm – can be pitched at a minimum of 25° and 20° in moderate exposure zones and 30° and 22.5° in severe exposure zones respectively. The 508 by 305mm slates exceed the common 2:1 length width ratio, allowing for specification on a greater range of roof pitches. The range offers a quality alternative to Welsh Slate and is readily available. Cembrit also has the facility to examine individual cases and offer specific advice on minimum pitch per project outside the parameters of BS 5534.