1 in every 3 roof slates supplied around the world is a CUPA PIZARRAS slate. Our commitment to quality and innovation has earned us the trust of thousands of architects, roofers and customers, reaffirming our world leadership in the natural slate sector. Our 16 quarries and 22 processing plants enable us to offer any kind of natural slate for roof tiles or facades, making our range the most complete on the market.


Independent slates supplies are specialists in the import and distribution of high quality, competitively priced natural sills, flooring and roofing slate. With over 30 years’ experience of sourcing and importing you can be confident that our range of slate offer’s outstanding quality at competitive prices, to cover all requirements. ISS boasts one of the largest stock levels of around 4-5 million slates at any one time, offering un-paralleled purchasing power, which is passed to the end user through fantastic value for money. All our slate’s come with a declaration of performance (DOP’s) which means they have been tested to, and surpass the top UK tests for water absorption, thermal cycle resistance and sulphur dioxide exposure. In addition, all our slates have been CE marked meaning they conform to EU regulations. ISS offers a beautiful and consistent range of natural slate, ideally suited to any, and all construction projects. Slate is superbly durable product that is unaffected by normal extremes of temperature and is highly resistant to acids, alkalis and other chemicals. It retains its colour, even in UV light and is impermeable to water, in addition slate is non-combustible and is compatible with all other building materials making it look fantastic in situ. These characteristics make it ideal as a building material, and more specifically as a covering for roofs and walls, sills and flooring.

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