Pendulum Slip Testing in Bristol & the South West

How the Pendulum Test Works

A weighted pendulum arm is released from a fixed height. As it swings, a rubber slider strikes the floor surface, and friction reduces the swing's onward travel. The test produces a Pendulum Test Value (PTV) — a single number describing the slip resistance of the surface.

Each test location is assessed in three directions, and both wet and dry conditions are measured as standard. We use TRL-pattern equipment certified to BS EN 16165:2021 (Annex C) with sliders that are conditioned to current standard between every set of swings.

PTV Score Interpretation

The HSE classifies slip risk using PTV bands:

• 0 to 24: High slip potential
• 25 to 35: Moderate slip potential
• 36 and above: Low slip potential

Most commercial floors are expected to achieve 36+ in the conditions they are most likely to encounter. A floor that scores well dry but fails wet is still a problem in any environment where water, drinks, cleaning fluids or condensation are foreseeable.

When Pendulum Testing is Required

• Following a slip accident, to evidence the conditions of the floor
• Pre-handover compliance under BS 8204
• Insurance-mandated testing of retail, hospitality and leisure premises
• Pre-purchase due diligence on commercial property
• Routine periodic testing as part of an HSE-aligned slip management programme
• Specification verification when flooring claims are challenged

What You Receive

Every test produces a UKAS-accredited report containing the test conditions, the equipment calibration record, all individual test results (each direction, wet and dry), the PTV score per location, photographs, and a clear interpretation against HSE guidance. Reports are typically delivered within five working days, with faster turnaround available on request.