What our Customers say…”FloorSlip is one of the best sources for information and services on Floor Safety and Floor Testing …and the Expert Witness reports for Slip Injury Lawyers are clear and unequivocal to assist in winning cases”


Cheap Floor Tests for Businesses and Lawyers available in In all Major UK Cities and nearby Towns including  Floor Testing  in Scotland – Aberdeen, Glasgow, Edinburgh, Perth, Stirling, Inverness and fife / Floor Safety Risk Assessments in North East England – Middlesborough, South Shields, Newcastle, Stockton on Tees, Darlington / Floor Pendulum Testing in North West England – Manchester, Lancaster, Liverpool, Runcorn, Preston, Blackpool, Blackburn Bury, Bolton, Warrington, Widnes, St.Helens (Cheshire) Birkenhead, Ellesmere Port, Chester, Crewe, Oldham, Stockport, Trafford Park. Rochdale, Congleton, Sandbach Macclesfield, / Floor Pendulum Tests in Wales in Cardiff, Newport, Swansea, Colwyn, Rhyl, Bangor / Pendulum Floor Slip Tests in Northern Central England – Sheffield, Leeds, Bradford (Yorkshire), Rotherham, Wakefield, / Slip Resistance Testing in East England in Hull, Humberside and Lincoln / BS7976-2 Pendulum Tests in the Midlands in– Nottingham, Derby, Rugby, Stoke, Stafford, Birmingham, Wolverhampton, Worcester, / Pendulum Flooring Tests in Central England – Northampton, Rugby, Derby, Oxford, Cambridge, Peterborough / HSE and BS7976 Approved Floor Testing in London and Home Counties – Watford, Milton Keynes, St.Albans, Cambridge, Newbury, Reading, Andover, Heathrow / Slip Injury Floor Tests in South England – Portsmouth, Brighton, Eastbourne, Southampton, Bournemouth, Salisbury, Isle of Man /  Floor Testing in Slip Accident Claims in South West England – Swindon, Bristol, Bath, Plymouth, Exeter, Falmouth, Cheltenham, Gloucester, Taunton, Warwick / Cheap Floor Testing in South East England – Dover, Margate, Rochester, Folkestone, Hastings, Tunbridge Wells,

FloorSlip Ltd – Head Office - Preston UK - Registered Limited Company 07757686

UK Specialists in H&S Approved Floor Pendulum Testing for Businesses and Expert Witness Services for Slip Injury Lawyers


Phone or Text    UK North  07774  32 32 67       UK South  07506  55 99 52 Email: - Info@floorslip.co.uk

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Members of the UKSRGUK Slip Resistance Group

News - BS 7976 is to be replaced by BS-EN 16165 - circa 2022

News - BS 7976 is to be replaced by BS-EN 16165 - circa 2022

The Floor Surface Roughness Test saves you money by monitoring changes in Floor Surface Roughness to help you avoid Slip Injury Claims


Floor Surface Roughness Test EquipmentThe Surface Roughness Test is a Health & Safety Executive approved method of monitoring changes in floor wear ONLY and an ‘indication’* of how slippery a Floor is in everyday circumstances. It is conducted using equipment like the Surtronic Duo, a hand held floor testing equipment, which determine floor surface roughness or ‘micro roughness’ (Rz) from which an approximation* of floor slipperiness can be established. The floor is measured in microns (1 Micron = 1 millionth of 1 metre and 1 human scalp hair is approximately 100 microns)

floor micro roughness testingIMPORTANT NOTE - The Surface Roughness Test can NOT be used to give accurate Floor Slip Resistance values - ONLY Floor Pendulum Testing gives an accurate reading of whether a floor is liable to cause a slip accident; particularly in the wet or when contaminated as this is when 90% of slip injury accidents occur .

Latest version of the Surtronic Duo (2018) available in the UK through Taylor Hobson

PO Box 36 , 2 New Star Road , Leicester , Leicestershire , LE4 9JQ , United Kingdom. Tel:  0116 276 3771 /  0116 246 3016

Email:  taylor-hobson.sales@ametek

Product shown available at


FloorSlip don’t just test floors for Surface Roughness - we also test engineering products from 1 - to  200 microns - contact FloorSlip today

About the Floor Surface Roughness Tester

This floor test equipment:


- Gives a good indication** of the grip potential of a floor surface or floor coatings

- Can be used to study local variations in a floor

- Is useful to check areas inaccessible to larger floor testing equipment

- Provides a means to monitor changes in a floor surface over a period of time

- Offers a good complementary floor measurement* to the pendulum slip test

- Can also be used to test surface roughness of engineering products such as steel

**Overall, though admirable in its abilities, the floor surface roughness tester should only be used as part of the overall assessment of a floor and not to measure floor slip resistance itself and could not be used to provide supporting evidence for or against a personal injury claim. Only the Pendulum Test and its results (PTV or Pendulum Test Values) are accepted for the purpose of providing a true reading of floor slip resistance in a court of law. You can also have a lot of floors checked by the Pendulum Test (A few hundred pounds) in comparison to the cost of the surface roughness tester (Thousands of pounds)..  

Method of Use of the Surface Roughness Tester

The lower section of the 2 part floor tester is placed on the flooring surface and a diamond stylus (needle) is motored across a small section of the floor. The stylus movement is automatically and remotely recorded on the top section of the floor roughness tester as the stylus travels up and down the tiny peaks and valleys of the floor surface and a number of samples are taken sequentially - normally 10 samples are taken and the average (mean) of the 10 measurements of Rz values gives an indication of surface roughness at that specific location.

Pictorial View of a Floor Surface through a Microscope

The Surface Roughness or ‘Rz’  = average of 10 samples   Z1 + Z2 + Z3c…..

Surface Roughness Measurement ‘R’ Parameters

The Surtronic Duo measures 5 different Roughness (R) parameters

Ra - Average Best Fit Line

Rz - Peak To Valley Average Sampling

Rt - Max in Peak to Valley sampling

Rp - Max Peak in sampling

Rv - Max Valley in sampling

Information courtesy of Taylor Hobson. For further information contact  Taylor Hobson -


UK 0116 276 3771 (Switchboard)

UK 0116 246 3016 (Direct)

email : taylor-hobson.sales@ametek.com

Floor Surface Roughness for a given floor contaminant (Source HSE) - i.e. the further down the list you work, the more ‘slippery’ the contaminant

The following table gives an idea of the surface roughness readings you might find for a given floor contaminant. It is possible to build up a clear picture for your own office, workshop, factory or reception etc

Floor Surface Roughness in wet floor scenarios (Source HSE)

More than 90% of floor slip accidents occur on wet floors and normally on relatively smooth floor surfaces. - (Source - UK Health and Safety Executive)

The advisory table below of the floor slip risk potential indicates the slip resistance of flooring materials under water-wet conditions. Note - The information does not define a ‘floor safety status’ of any floor or flooring material but simply gives an indication of a floor state. It is always recommended a Pendulum Test is conducted to give accurate slip resistance readings; the results of which can be used as evidence in court in the event of a personal slip injury claim.  

Slips Assessment Tool (SAT) Floor Slip Assessment Software

To aid you further, the Health & safety Executive has devised a software tool known as the Slips Assessment Tool (SAT), which correlates the Rz readings found in conjunction with local flooring conditions to give the user a good indication of the slip potential of floor surfaces; further information can be found at http://www.hse.gov.uk/lau/lacs/77-1.htm

Read More on the Slips Assessment Tool

Surtronic Duo Surface Roughness Meter - Calibration and Setup Guide of Previous Version

For Interest for You - The Earlier version of the Surtronic Duo is also known as the ‘Kenny’ as it has the same shape as the character in South Park!

Calibrating the Surtronic Duo - This image is available to download as a PDF

The PDF image should be of a size that will fit into the Surtronic Duo case when folded

Minimum Floor Surface Roughness (Rz) in Microns*

Floor Contaminant

20 microns

Clean Water, Coffee, Soft Drinks

45 microns

Soap Solution, Milk

60 microns

Milk Cooking Stock

70 microns

Motor Oil, Olive Oil

Above 70 microns

Gear Oil, Margarine

For further information read http://www.hse.gov.uk/research/hsl_pdf/2005/hsl0526.pdf

Floor Surface Roughness in Microns*

Floor Slip Potential Risk

Below 10 microns


Between 10 and 20 microns


Above 20 and up to 30 microns


Above 30 microns

Extremely Low

For further information read http://www.hse.gov.uk/research/hsl_pdf/2005/hsl0526.pdf

Kenny aka floor surface rougness tester