Natural slate

Why is Heavy 3 the best choice for Scottish roofs?

roofing slate heavy3 projects

Slate has been used as a roofing material throughout Scotland since the middle ages, but when Scottish quarries closed between 1955 and the 1960s, Heavy 3 became the perfect choice for slate roofs.

Its close similarity to the traditional highland slate from Ballachulish (no longer produced) has made it the best choice for repair and replacement of traditional roofs in Scotland.

But why should you choose Heavy 3 slates for your roof? Find here the best reasons!


  1. No re-roofing of any Heavy 3 slate roof

    A poor quality roof needs constant repair and maintenance, but when good quality slate is used, those expenses during its lifetime are extremely low.

    Since CUPA PIZARRAS’ slate started to be used in Scotland more than 20 years ago, there have been no cases of Heavy 3 roofs being replaced or repaired.

  2. Quarry’s reputation confirmed: 125 years of production

    The slate characteristics depend on where it has been extracted. That is why it is imperative to validate the reputation from both the quarry and the company which produces it.

    Heavy 3 slate is quarried from the CUPA PIZARRAS No 3 quarry in San Pedro de Trones (León) in northern Spain. This quarry has been in operation since 1892 and produces around 25,000 tons each year!

    heavy 3 slate projects

  3. Heavy 3 is a true heavy

    Heavy 3 is produced at a thickness of 7-8 mm. This extra thickness gives it strength to combat dampness, high wind speeds and driving rains common throughout Scotland.

    Performance is a key point to take into consideration when choosing a roofing material, and Heavy 3 will out-perform better than other roofing materials.

  4. 100 years warranty

    Choosing a CUPA PIZARRAS product means opting for peace of mind. The quality of our slates is guaranteed by meticulous control throughout the whole production process.

    Actually, our resolute commitment to quality has led us to offer a 100 years warranty on Heavy 3 slates.

    Thousands of architects, roofers and individuals around the world have already trusted us. What are you waiting for?

    heavy 3 slate properties

For further details about Heavy 3 slate, download the brochure here.