Scottish granite, sandstone, slate, and imported natural stone all face distinctive slip testing considerations. Historic buildings, hotel lobbies, distillery visitor centres, and public paving frequently depend on natural stone PTV evidence.
Natural stone polishes under foot traffic. A floor reading PTV 38 in its first year may drop to PTV 22 over a decade — often invisibly. For Scottish heritage and hospitality properties, periodic UKAS-accredited re-testing captures this degradation before it becomes an incident.
We test natural stone products both in our UKAS ISO 17025 accredited laboratory (Schedule 7933) and in situ across Scottish commercial premises. Laboratory pre-testing is typically the most cost-effective approach for specification; in-situ testing is used for post-installation verification, annual compliance monitoring, and forensic post-incident evidence.
Typical turnaround: 48 hours from sample receipt (laboratory) or 48 hours from site attendance (in-situ). All testing issues a full UKAS-accredited certificate suitable for Scottish specification, tender, building-control, insurance, and litigation purposes.
Yes. Dumfries red sandstone, Caithness flagstone, and most Scottish sandstones all polish under foot traffic over years and decades. The polishing is often invisible to the eye but dramatic in PTV terms.
Yes. The pendulum test is entirely non-destructive. We work routinely with conservation officers on Category A, B, and C listed Scottish buildings.
Variable. Polished granite has excellent dry PTV but wet PTV can fall below 20. Testing is essential before specification, especially given Scottish wet-weather entrance conditions.
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UKAS ISO 17025 · No. 7933