National Maritime Museum, Cornwall, Riverstone, Ultra grade

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Location: National Maritime Museum, Falmouth, Cornwall
Architect: Long & Kentish, London
Slate Used: SSQ Riverstone®, Ultra grade, Grey roofing slate

This project is a fully independent museum, a development of the original FIMI (Falmouth International Maritime Initiative) partnership created in 1992 and the result of collaboration between the National Maritime Museum, Greenwich and the former Cornwall Maritime Museum in Falmouth.

The National Maritime Museum Cornwall, makes a striking impression from its historic waterfront location in Falmouth. The most outstanding feature is the spectacular rhomboidshaped roof. An ambitious architectural statement, the roof features a dramatic false perspective achieved by arranging different sizes of slate in diminishing courses.

With on-site support and advice from SSQ’s Technical Department, this ambitious and complex project was achieved using a total of 14 different sizes of slate with lengths ranging from 350mm x 500mm and widths from 200mm to 375mm. In addition, 8 different batten gauges were used and 9 different hole positions.


Riverstone Projects Roofing Slate Case Studies SSQ Natural Slate Case Studies UK Projects


SSQ’s main aim is to continue to deliver high level of service whilst keeping our team healthy by fully complying with the government’s guidelines.

We are continuing to closely monitor the situation and in the meantime service levels will remain unchanged and we will continue to operate in the coming weeks.

Our phone lines remain open and our technical department is still handling enquiries swiftly. In addition to this, we have started to host weekly webinars on natural slate and phyllite. For more information please check our social media.

We wish you well during these challenging times and we thank you for your continued support!