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Slip Resistance Ratings Explained & Suitable Applications

Ramp Testing for (R) Ratings – DIN51130 & DIN51097

The most commonly understood method of testing the slip resistance of a tile is the ramp test which generates an R-Value ranging from R9 – R13. This method is used by all of European tile manufacturers meaning that slip resistance information will always be available for you.

DIN 51130

R9

R10

R11

R12

R13

Slip Angle

6-10 deg

10-19 deg

19-27 deg

27-35 deg

35 deg

Wet Slip Risk

High Risk

Moderate

Moderate

Low Risk

Low Risk

Suitable for

Dry Areas

Areas kept mostly dry

Can be occasionally wet

Commercial Wet areas

Very wet commercial areas

 

The above table summarises a German National Standard test method; DIN51130. This test is a shod foot test where an individual walks on a wet surface wearing cleated safety boots whilst being held by a harness. The angle of the ramp is adjusted and whilst doing so the degree at which the individual slips, generates an R-Value.

DIN 51097

Uses

A

Dry barefoot areas (domestic use, kitchen, living rooms, bathroom)

B

Pool surrounds & showers

C

Commercial pools, jacuzzi’s & gym showers

 

Tile ranges can also be subject to an additional layer of ramp testing - DIN 51097. This tests the tile in wet & barefoot conditions, similarly repeating the differentiation in angles. This secondary line of classification is based upon barefoot use, so should only be considered when the tiles are being used in swimming pools, wetrooms or any other place where no footwear would be worn.

The above table has been extracted from a manufacturers technical data sheet and illustrates the ratings definition of use. Many ranges we provide have a natural or matt finish that is commonly classed as an R10 based on the DIN51130 ramp test. An additional classification of Class A, B & C can be attributed to the barefoot DIN51097 ramp test. 

A 'Grip' finish is a consideration for some domestic applications; this finish is classed as an R11. This will be recommended for wet areas such as a shower floor or perhaps a garden patio. As technology improves, the 'grip' finishes become more subtle meaning the difference in texture between interior & exterior tiles becomes less and less. This is a real benefit for those looking for those seamless transitions.

Pendulum Testing

The Pendulum CoF test is designed to replicate the motion of a slipping foot and the tiles response to that motion. The value generated is called the Pendulum Test Value (PTV). It’s a different way of testing the slip resistance; however, its values can be directly compared to the results of the two tests we’ve just gone through.

R-Value (Shod Foot)

PTV

R9

11-18

R10

18-34

R11

34-51

R12

51-70

R13

70+

ABC-Value (Bare Foot)

PTV

A

21-31

B

32-42

C

45+

 

Over recent years, it appears that the PTV test is preferred method of testing when it comes to tile ranges and their suitability for specific applications. Architects & designers will look for a PTV 36+ for a lot of commercial projects such as restaurants etc. Domestically, this is the sweet spot for wetroom & external tiling.
 

What does all of this mean for your application?

All these statistics and methods may all seem unbelievably mundane and a tad confusing; however, they paint an important picture for us as suppliers to depict for you. It’s vital to understand that the different ratings and values are not black and white for domestic clients- they can be interpreted to suit your specific application or setting. The following applications would be specific to domestic renovations:

Setting #1 – Wetroom Floor Application

With the growing popularity of modern wetroom designs, it is necessary to select a suitable surface that will be safe to stand on with bare feet in wet & soapy conditions. We can collate the data from all three test values to generate the prime slip rating value that would be sufficient for a wetroom. We recommend, where possible, to go for an R11 or PTV 36+.  With many ranges being produced with this classification, it is becoming less of a compromise in aesthetic than it once was.

Our Kuro collection is a perfect example of a tile that has an R11 finish within the range. Feel free to seek the advice of one our Sales Consultants to establish a suitable surface for this application.

Setting #2 – Indoor-to-Outdoor Continuation

The concept of having the same tile flowing from the Kitchen/Living space through to the exterior garden, appeals to many of our clients in the midst of a renovation. Many of our ranges now come with a natural finish (suitable for interior use) and an anti-slip finish (exterior use). Farmhouse is a wonderful new reclaimed limestone effect range with an interior finish (R10A) that has a matching exterior tile (R11A+B).

What was once a near impossible task of finding a large tile in an R11 texture, our manufacturer is now producing the grip finishes in very large formats. We have a new range that is now produced in large formats - 90x90cm & 120x120cm.  Check out our Detroit collection for a range that has a sleek industrial feel, neutral colours and the two finishes that make your internal-to-external transition seamless.

As is the case with many things in our lives, we are lucky enough to have an ever-improving choice of products & materials. As technology improves, so does our selection of porcelain stoneware. Our knowledgeable staff are on hand to advise you on the necessary surfaces required for your project.


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