Independent · UKAS Testing Laboratory No. 7933 · ISO/IEC 17025 Safety by choice, not by chance · 020 8246 5562
Slip Testing Lothian

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Method & accreditation

Two readings, one clear answer

Grip cannot be judged by eye, so we take it two complementary ways — and we are accredited for both.

The pendulum reading

Pendulum Test Value — PTV
0–24High risk
25–35Moderate
36 and aboveLow risk

The texture reading

Surface roughness — Rz, in microns
Under 10High risk
10–20Moderate
Above 20Low risk

The pendulum

Grip is measured first with the pendulum. A weighted arm sweeps a rubber slider across the floor, standing in for a heel that loses its hold, and sets the result down as a Pendulum Test Value. We take it wet as well as dry, in three directions; a reading of 36 or more falls in the low-risk band, which the HSE treats as the line to clear.

Reading the texture

The surface texture is the second measure. Where floors meet rain, spills or grease, the fine roughness — recorded in microns — gives moisture somewhere to go, so the surface keeps its grip. It complements the pendulum rather than replacing it, and over time it reveals a floor wearing smooth before it becomes a hazard.

The standards

  • BS 7976-2 — the operation of the pendulum tester.
  • BS EN 16165 — the current standard for measuring surface slip resistance (it superseded BS EN 13036-4).
  • UKSRG guidelines — how the results are interpreted (we are a member).

Whoever is responsible for a building holds the duty — employers, facilities managers, and in care settings the Care Inspectorate, which expects slip risk to be assessed and managed across Scotland.

Independent, and accredited

Surface Performance fits nothing and sells nothing — no connection to any flooring manufacturer, treatment company or equipment maker, and no commission from anyone. UKAS-accredited (UKAS Testing Laboratory No. 7933, ISO/IEC 17025), and recognised by RoSPA, FIFA, World Rugby, the ITF and FIH for related work. Nothing influences the figure.

UKAS · 7933ISO/IEC 17025RoSPAUKSRG memberFIFAWorld RugbyITFFIHThe FA

Laboratory product testing

Beyond site work, our environmentally controlled laboratory (to ISO 291) examines more than 300 flooring products a year — tile, stone, resin, vinyl and decking — and can issue slip-resistance certification or support product development.

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Surface, rough size, where you are across Edinburgh or the Lothians — that is all we need to send a fixed quote.

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020 8246 5562 · info@surfaceperformance.com