Natural Slate Production Process in 7 Steps

29 February 2016
Comments Comments Off on Natural Slate Production Process in 7 Steps
29 February 2016, Comments Comments Off on Natural Slate Production Process in 7 Steps

Natural Slate Production Process in 7 Steps

Ever wonder where your ‪‎slate‬ ‪‎roof‬ tiles come from? From the quarry to your home, natural slate goes a long way. It is a 100% natural product, and its production process is handcrafted, probably much more you have ever imagined. Take a look at our beautiful Natural Slate Roofing by CUPA PIZARRAS. We give FREE Estimates – (847)  827-1605

1.)  Before quarrying, there is unusable fragmented material layer that needs to be removed. Sometimes this overburden is hundreds of feet thick!

2.) After that, the expert geologists must carry out several surveys and sample testing in order to study the best areas to extract. Extraction begins only when the quality and purity of the slate rock has been verified. There are two exploitation systems: open quarries and underground mines, but the quarrying process remains very similar.

3.) Quarrying. The slate is then sawn from the quarry face in large flat slabs using a diamond beaded steel cable. After that, slabs are carefully cut into smaller natural slate blocks, loaded into trucks and transported to the factories next to the quarry. The transformation process begins.

4.) Factory sawing. The slate blocks are selected in accordance with their quality and potential by the production team, and sawn into different sizes.

5.) The next step is shaping. These smaller blocks are then hand split one by one by skilled craftsmen into slates of the finished thickness. This step is probably much more handcrafted than you could ever imagine!

6.) Then, the corners of each item are beveled by a machine in order to give them the traditional chamfered edge and exact finished size.

7.) Once the processing process has finished, the natural slates undergo final inspection and are sorted based on their quality. After classification the slates are counted and packaged on wooden pallets for storage and subsequent delivery.

A label is placed on each pallet with a description of the slate (quarry and plant of origin, format, thickness…)
But CUPA PIZARRAS, the world leader in natural slate, goes beyond the regular slate production process. Their exhaustive control of the whole process enables them to offer a range of natural slates that exceed all the international quality standards.

On the same day the pallets are packaged, they are sent to CUPA PIZARRAS´s central warehouse where they are given another label with a bar code to guarantee the traceability of each item from the place of origin to the final destination.
Unlike other brands, CUPA PIZARRAS produces and transforms its natural slate in its own quarries and units, enabling them to control product quality from source.


Slate is subject only to extraction and working processes and does not need any additional treatment. The simplicity of its production process, without chemical products, makes it one of the most sustainable product for any project.

Throughout the process involving the extraction and processing of the slate, water is used as a coolant and base material for removing rubble. Nevertheless, this water is recycled and purified in a closed circuit to prevent such a precious resource from being wasted.

Moreover, CUPA PIZARRAS are leaders in their initiatives to restore quarries: once the reserves of slate have been exhausted, the quarry can be restored by hydroseeding native plants, ensuring natural recovery of the local flora and fauna.