Pendulum testing
across Greater London.

Why Greater London needs real PTV data.

Greater London's professional services and financial district is dense with polished-stone atriums, revolving door mats and multi-storey stairwells. These exact surfaces generate a disproportionate share of premises liability claims — and each one turns on a single question in court: what was the PTV?

The UK's largest commercial estate, where polished stone atriums and revolving-door lobbies generate a disproportionate share of slip claims.

Pendulum testing. Not opinion.

The pendulum method — defined in BS 7976 and BS EN 16165, and referenced throughout HSE guidance — is the only test HSE considers reliable on wet or contaminated floors. A rubber slider swings from a fixed height and drags across the test surface for exactly 127mm; energy lost to friction is recorded as a Pendulum Test Value (PTV) on a scale of 0 to 150.

HSE classifies any PTV below 25 as a high slip potential. 25–35 is moderate. A PTV of 36 or above, measured wet and dry with the correct reference slider, is the benchmark for a floor considered safe under normal use. Every report we produce in Greater London is issued under our UKAS ISO/IEC 17025 accreditation (Lab 7933) — the method, the technician and the equipment are all independently audited.