Quartzite · Landscape Stone
RockDeck 20 is a modular decking system in genuine Norwegian Alta quartzite with hidden fixings — a natural-stone terrace floor built for Nordic climates, with very low maintenance and a long service life. Boards are 20 mm thick and 300 mm wide, in module lengths of 300, 600, 900 and 1200 mm, so every short end lands on a joist at 300 mm centres. They are fixed with concealed mounting clips over a 3–5 mm EPDM interlayer between stone and joist, which adds stability and reduces load on the structure. Alta quartzite has very high strength, low water absorption and very good frost resistance; the surface is the stone's natural cleavage face. Suits terraces, roof terraces, cabins and architectural outdoor spaces. Product data: joists at 300 mm centres · EPDM interlayer 3–5 mm · recommended joint width 4–6 mm · origin Alta, Norway.
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