Kentdale Ultra is the sister slate to Kentdale Blue Grey. A beautiful mid blue grey slate with a true, non shiney “natural slate” texture which is even more reminiscent of our own indigenous slate from the Lake District.
The reserves which the quarry work are regarded as some of strongest and hardest in the La Bana region of North West Spain. We only use one small area of the Kentdale quarry to produce this option. This area has slightly different splitting and texture characteristics to the rest of the quarry. Over the last few years we have been working exclusively with the quarry to produce a Fixed Length by Random Widths package to meet the demand for a more traditional looking roof. This is now available in 450mm long x random widths. It is produced to a nominal thickness that is in keeping with Cumbrian “Bests” and Welsh “County” grades. The slate is preholed to accommodate headlaps of between 75mm and 100mm, allowing for it to be used on a wide variety of roof pitches.
The raw slate is a true slate which has undergone the metamorphic process of physical and chemical changes within its structure due to the heat and pressure encountered since it was laid down in the Ordovician Period over 400 million years ago. This gives the finished roofing slate the strength and durability to withstand the rigours of protecting us from the elements. It also give the slates the distinctive rugged texture and allows the slating contractor to work with it in a very traditional manner.
The quality of the slate has been recognised by a number of local and special planning authorities around the UK who approve of this slate as a high quality cost effective alternative to traditionally used slates without compromising on the finished aesthetics of the project.
The producers are very quality conscious and the slate is regularly and rigourously tested to the current BSEN12326-1:2004 and attains A1, T1, and S1 certification.
Every crate bears the current testing data along with a production reference which allows for traceability from the quarry face through to delivery to site.