Not all natural slates are the same. Besides its beautiful appearance, Heavy 3 can last over a hundred years, making it a very cost-effective roofing material!

The best choice for Scottish roofs

Its extra thickness of 7-8 mm gives it the perfect strength to withstand Scottish weather while boosting the value of any property.

heavy 3 roofing slate

A poor quality roof needs constant repair and maintenance, but when good quality slate is used, not only the cost of re-roofing can be effectively discounted, but the repair and maintenance expenses during its lifetime are extremely low.

The use of Heavy 3 slates results in a low life cost.

Previous slide
Next slide
If you have any questions, our experienced team on slate is at your disposal

Why choose Heavy 3 slate

Reasons to choose the perfect roofing slate:

A true Heavy

Produced at an extra thickness suited for inclement weather.

icon no re-roofing

No re-roofing

No Heavy 3 roof has ever been replaced or repaired.

Reputation confirmed

More than 125 years of production.

Peace of mind

100 years warranty on Heavy 3 slates.

icon help

Want more information on Heavy 3 for your project?
Complete this form and we’ll be in touch as soon as possible.

The value of Heavy 3 lies in its properties

Heavy 3 is more cost effective than concrete or ceramic tiles, which typically last approximately 50 years.

impermeable icon

Impermeable to water

Its extra thickness gives it strength to combat dampness, high wind speeds and driving rains common throughout Scotland.
weather resistan icon

Weather and UV resistant

Unchanged properties over time without the need for maintenance.
chemical resistant icon

Chemical resistant

Not affected by chemicals or pollutants (acid or alkali) exterior.
a house with heavy 3 slate roof
scottish slate roof

Other characteristics of slate, such as strength and impermeability, are also superior to those of concrete and ceramics.

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!

damaged icon

Not damaged

By fungi, moss, insects, animals or birds.
strong icon


While weighing substantially less than man-made roofing tiles.
non-combustible icon


Natural slate is a material that does not ignite.

Would you like to see a sample? Please complete the form to receive your slate sample


For technical information; declarations of performance, certifications and installation, please visit our resource centre.

heavy 3 slate brochure

Heavy 3 Brochure

For further details about Heavy 3 slate, please download our product brochure.

Contact Form

You can contact us through this form. Our team of experts will answer all of your queries.

* Required fields

Contact information

Other resources are available to you to contact us:

UK Office

telephone: +44 (0) 20 3318 4455

Press Agency

CIB Comms
telephone: +44 (0) 1372 371 80

Communications Manager

Hannah Wall
telephone: +44 (0) 20 3904 3001