Slip resistance R9 to R13 is the German classification of how slip-resistant a floor is, determined by a ramp test: R9 stands for the lowest and R13 for the highest slip resistance. For workplaces, these slip resistance classes are a key criterion when planning, retrofitting and specifying floors, matting and surface finishes.
This guide gives you an overview of the R9 to R13 slip resistance classes, displacement space and the main German regulations behind them. It does not replace a risk assessment or legal advice, but it will help you ask the right questions and classify suitable products correctly.
Slip resistance R9 to R13: the classes at a glance
The rating is determined using a ramp test on an inclined plane. A test person wearing safety shoes walks on an oiled sample while the angle of the ramp is gradually increased. The angle at which the person starts to feel unsafe determines the slip resistance class.
| Slip resistance class | Angle of inclination (test) | Slip resistance | Examples (extract, no guarantee) |
|---|---|---|---|
| R9 | 6° to 10° | low | Indoor entrance and sales areas, dry corridors |
| R10 | over 10° to 19° | normal | Workshops and stores with little contamination |
| R11 | over 19° to 27° | increased | Areas that are regularly wet, covered loading ramps |
| R12 | over 27° to 35° | high | Commercial kitchens, uncovered ramps |
| R13 | over 35° | very high | Areas with a lot of grease or oil, e.g. food processing |
Extract, no guarantee – the current version of the regulation is authoritative. The examples are heavily simplified. The specific classification of individual rooms and areas is given in Annex 2 of the German workplace rule ASR A1.5.
R13 slip resistance with displacement space
Where large amounts of grease, oil, water or food waste end up on the floor, slip resistance alone is not enough. Displacement space describes the volume below the walking surface that can take up slippery substances. It is specified as V4, V6, V8 or V10, the number being the minimum volume in cm³ per dm². High slip resistance classes are typically combined with a displacement space, for example R13 V10 in areas with heavy grease contamination.
ASR A1.5 slip resistance table
The German Technical Rule for Workplaces ASR A1.5 ‘Floors’ sets out the requirements for floors in workplaces. Its annex contains a table assigning a slip resistance class and, where applicable, a displacement space to work rooms and areas. The former German DGUV Rule 108-003 has been withdrawn; its essential content has been incorporated into ASR A1.5.
Slip resistance to DIN EN 16165
The test standard DIN EN 16165:2023 describes methods for determining the slip resistance of floors. The ramp test on an inclined plane for shod areas is included as one of these methods. Many existing test certificates still refer to the earlier DIN 51130, so always check the underlying standard and the test date on any test report.
Barefoot areas: slip resistance classes A, B and C
Wet barefoot areas such as showers, changing rooms and swimming pools have their own slip resistance classes A, B and C. These cannot be compared with R9 to R13. Find out more under non-slip barefoot and wet areas.
Anti-slip solutions by slip resistance class
Anti-slip floor coatings
A coating with broadcast aggregate increases the slip resistance of large areas. Different slip resistance classes can be achieved depending on grain size and build-up. Details of the specific product can be found under anti-slip floor coatings.
Anti-slip tape and strips
For steps, ramps and walkways, anti-slip tape is a quick retrofit. Tapes differ in grit size and area of use. Versions with test evidence for a specific slip resistance class are available on request.
Outdoor matting
For areas exposed to water and dirt, a non-slip outdoor mat is a good choice. Ask for versions with the corresponding R13 test evidence.
Gratings and chequer plate
Metal surfaces quickly become slippery with oil and water. You will find solutions under anti-slip grating and anti-slip coating for chequer plate.
Slip-resistant flooring
Where a continuous covering makes sense, slip-resistant flooring is an alternative to a coating.
Selection: what matters
Slip resistance: First determine the slip resistance class required for the area. This is based on your risk assessment and on ASR A1.5 with its Annex 2. Higher is not automatically better, as very rough surfaces are harder to clean.
Substrate: Concrete, tiles, steel and timber each need different products. Load-bearing capacity, flatness and residual moisture all affect adhesion.
Cleaning: Slip resistance is only maintained if the floor is cleaned appropriately. Clogged profiles lose their effect, so match the surface and the cleaning method to each other.
Fixing: Coatings are applied over the whole surface, tapes are bonded, and profiles and plates are screwed down. The choice depends on loading, service life and any planned alterations.
How your enquiry works
- You tell us the area, the substrate and, if known, the required slip resistance class.
- We propose suitable products and name the available test evidence.
- You receive a quotation and decide how to proceed.
FAQ: slip resistance R9 to R13
What does slip resistance to DIN EN 16165 mean?
Slip resistance to DIN EN 16165 means that a floor has been tested using one of the methods in this test standard (2023 edition), such as the ramp test on an inclined plane. The standard itself does not specify which slip resistance class an area requires.
Where can I find the ASR A1.5 slip resistance table?
You will find the table in Annex 2 of ASR A1.5, which assigns work areas to slip resistance classes. Always use the current version of the regulation, available for example from the German Federal Institute for Occupational Safety and Health (BAuA).
Which slip resistance is right for an industrial floor?
The right slip resistance for an industrial floor depends on the work area and the slippery substances present. Dry halls can manage with lower classes, while areas with oil, grease or water need higher classes and possibly a displacement space. Your risk assessment is what counts.
When does R13 slip resistance with displacement space make sense?
R13 with displacement space makes sense in areas where large quantities of grease, oil or other slippery substances reach the floor. The displacement space takes up these substances below the walking surface. The specific requirement is set out in the regulations.
The right slip resistance class is the basis for every anti-slip measure. Tell us where the product will be used and we will help you select products with the right slip resistance from R9 to R13.