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Stair Nosing Slip Resistance Values

The SRV's or Slip Resistance Values determine the slip resistance classification between High, Moderate and Low Slip Potential.

Slip Resistance Values (SRV's)

CAT stair nosing infills and treads have been independently tested for slip resistance values (SRV). For use in dry conditions, all our stair nosing's and infill test results show a low risk of slip, contributing to the overall safety aspect of interior staircase installations.


CAT also manufactures a range of purposely designed stair nosing's for use in external or wet areas. The values published are for the normal direction of travel when installed on stairs, i.e., ascending and descending. It must be noted that many factors will contribute to the safety of stairs, not solely the floor covering or the stair nosing fitted.


Footwear worn, poor maintenance, obstructions, surface contaminants, hurrying, distraction and the influence of alcohol and drugs all have a significant impact on stair safety. End users and facilities managers should consider regular inspection of stair installations and act to minimise the risks within their control. Please get in touch with our sales office for more information and advice.

Test Method

The independent test method used is the Pendulum 4S in conjunction with the guidelines recommended by the UK Slip Resistance Group. UK Slip Resistance Group classified the degree of slip resistance as shown below.

SRV Slip Resistance Value



High Slip Potential

Moderate Slip Potential

Low Slip Potential

PTV Pendulum Test Value

0 - 24 PTV

25 - 35 PTV

36 +

Castellated PVC Infill - Standard Supply

SRV    PTV Dry 85 --- PTV Wet 76

SRV's Castellated PVC Nosing

ATI 49.5 & BTI 49.5 Tread Inserts

SRV    PTV Dry 82 --- PTV Wet 54

SRV's ATI Nosing

Ribbed Treads - Brass & Aluminium

SRV    PTV Dry 73--- PTV Wet 45

SRV's Ribbed Brass Nosing

Smooth Textured PVC Infill

SRV    PTV Dry 65 --- PTV Wet 56

SRV's Smooth Textured Nosing

Olympic Carborundum

SRV    PTV Dry 92 --- PTV Wet 86

SRV's Olympic Carborundum Nosing

Castellated Treads - Aluminium

SRV    PTV Dry 82 --- PTV Wet 54

SRV's Castellated Nosing


Colours are shown for guidance only. Please request a sample for accurate referencing.

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