In Germany, how slip-resistant a floor is is described by the slip resistance ratings R9 to R13. R9 stands for the lowest and R13 for the highest slip resistance. For workplaces, the ratings are a key criterion when planning, retrofitting and procuring floors, mats and coverings.
This guide gives you an overview of the ratings, the displacement volume and the most important regulations. It does not replace a risk assessment or legal advice. But it will help you ask the right questions and classify suitable products.
The ratings at a glance
Classification is based on a walking test on an inclined ramp. A test person wearing safety shoes walks on the oiled sample while its inclination is gradually increased. The angle at which the person becomes unsteady determines the rating.
| Rating | Angle of inclination (test) | Slip resistance | Examples (extract, without guarantee) |
|---|---|---|---|
| R9 | 6° to 10° | low | Indoor entrance and sales areas, dry corridors |
| R10 | over 10° to 19° | normal | Workshops and warehouses with little contamination |
| R11 | over 19° to 27° | increased | Areas with regular wetness, covered loading docks |
| 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. in food processing |
Extract, without guarantee – the current version of the rule is authoritative. The examples are highly simplified. The specific classification of individual rooms and areas can be found in Annex 2 of ASR A1.5.
Slip resistance R13 with displacement volume
Where a lot of grease, oil, water or food residue gets onto the floor, slip resistance alone is not enough. The displacement volume describes the volume below the walking surface that can hold slippery substances. It is specified as V4, V6, V8 and V10, the number standing for the minimum volume in cm³ per dm². High ratings are typically combined with a displacement volume, e.g. R13 V10 in areas with heavy grease contamination.
ASR A1.5 slip resistance table
The German Technical Rule for Workplaces ASR A1.5 “Floors” specifies the requirements for floors in workplaces. Its annex contains a table that assigns a slip resistance rating and, where applicable, a displacement volume to work rooms and areas. The former DGUV Rule 108-003 (German Social Accident Insurance) has been withdrawn; its essential content has been incorporated into ASR A1.5.
Slip resistance according to DIN EN 16165
The test standard DIN EN 16165:2023 (German edition of European standard EN 16165) describes methods for determining the slip resistance of floors. The inclined ramp walking test for shod areas is included as one of these methods. Many existing test certificates still refer to the former German standard DIN 51130. When checking test certificates, therefore, pay attention to the underlying standard and the test date.
Barefoot areas: classes A, B and C
Wet barefoot areas such as showers, changing rooms and swimming pools have their own classes A, B and C. They are not comparable with R9 to R13. Find out more under Slip-resistant barefoot and wet areas.
Suitable solutions by slip resistance
Floor coatings
A coating with scattered granulate increases the slip resistance of large areas. Depending on the grit and build-up, different ratings can be achieved. Details of the specific product can be found under anti-slip floor coatings.
Anti-slip tapes and strips
For steps, ramps and walkways, anti-slip tapes are a quick retrofit. They differ in grit and area of use. Versions with test certificates for the rating are available on request.
Outdoor mats
For areas with wet and dirt, an outdoor anti-slip mat is suitable. Ask about versions with corresponding R13 test certificates.
Gratings and chequer plates
Metal surfaces quickly become slippery with oil and moisture. Solutions can be found under slip-resistant gratings and anti-slip coating for chequer plate.
Non-slip floor covering
Where a continuous covering makes sense, a Non-slip floor covering offers an alternative to coating.
Selection: what matters
Slip resistance First determine the required rating for the area. The basis is the risk assessment and 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 wood need different products. Load-bearing capacity, evenness and residual moisture affect adhesion.
Cleaning: Slip resistance is only maintained if the floor is cleaned appropriately. Contaminated profiles lose their effect. Match the surface and cleaning method to each other.
Fixing: Coatings are applied over the full surface, tapes are bonded, profiles and sheets are screw-fixed. The choice depends on the load, service life and conversion plans.
How your enquiry works
- You tell us the area, the substrate and, if known, the required rating.
- We suggest suitable products and specify the available test certificates.
- You receive a quotation and decide on implementation.
Frequently asked questions about slip resistance R9 to R13
What does slip resistance according to DIN EN 16165 mean?
DIN EN 16165:2023 is a test standard. It describes methods used to determine the slip resistance of a floor, including the inclined ramp walking test. It does not regulate which rating an area requires.
Where can I find the ASR A1.5 slip resistance table?
The assignment of work areas to ratings is set out in the annex to ASR A1.5. Always use the current version of the rule, for example via the Federal Institute for Occupational Safety and Health (BAuA).
Which slip resistance is right for industrial floors?
That depends on the work area and the slippery substances. Dry halls can manage with lower ratings. Areas with oil, grease or wet need higher ratings and possibly a displacement volume. Your risk assessment is decisive.
When does slip resistance R13 with displacement volume make sense?
In areas where large quantities of grease, oil or other slippery substances get onto the floor. The displacement volume holds these substances below the walking surface. The specific requirement can be found in the regulations.
The right rating is the basis for every anti-slip measure. Tell us your area of use. We will help you choose products with the right slip resistance from R9 to R13.