52 EXTERNAL ENVELOPE
a range of dimensions to create a varied and dynamic finish. It also allowed the impression of stratified rock to provide a further visual cue to the geological nature of the work conducted inside.
A traditional approach
While cladding provides a striking modern use for natural slate, the material remains a popular choice for more traditional building designs and heritage roofs too. In particular, many projects can benefit from the longstanding design choice of laying natural slate in ‘diminishing’ courses. This approach, sometimes referred to as random slating, was originally the result of many Scottish quarries historically producing slates in varying dimensions and thicknesses to maximise the quarry output. This led to the practice of laying the slates with the largest ones at the base of the roof and the smaller ones near the ridge.
Some manufacturers offer options in a random format should the distinctive aesthetic be required. This was the case during a recent renovation of the historic Marine Hotel in Troon, Ayrshir located on the edge of Royal Troon Golf Course. The choice of product closely replicated the
colour and thickness of the original slates while maintaining the diminishing courses used on the original roof. Finally, natural slate can be used to complement other natural materials, textures and colour schemes to create unique architectural designs, as evidenced by a recent new build development in Whitstable. Pitched roofs feature extensive use of dark grey aluminium glazing systems, including rooftop lanterns and large sloping roof windows. The design also included high quality natural timber cladding, sedum green roofing and natural stone blockwork, used alongside natural slate. achieving the desired look and a durable result. While natural slate has a long and established history as a building material, the design possibilities, sustainable credentials and performance benefits for modern construction projects are clear. Manufacturers offer product portfolios of natural solutions which can provide the ideal result for specifiers, whether it is a unique and contemporary project or one looking to maintain traditional aesthetics.
David Cooke is business development manager at Cupa Pizarras
WWW.ARCHITECTSDATAFILE.CO.UK
ADF OCTOBER 2021
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