Slip Ratings Explained

There’s a decent chance that somewhere in your home you’ll have tiled flooring, but do you know if the tiles you installed are as safe as they could be?

Whilst it’s understandable that people choose the tiles they want to lay in their kitchens, bathrooms, or even gardens, by aesthetics alone it’s important to realise that most floor tiles are assigned a slip rating and that you should select tiles with a slip rating suitable for where the tiles are to be be installed.

As mentioned, not all floor tiles have slip ratings (although the ones that don’t will be graded to a specific minimum standard regardless) but those designated as anti-slip floor tiles will be assigned what is known as an ‘R’ value. These values span a scale from R9 (not tested but manufactured to a minimum standard), right through to R13 (the highest slip resistance). It might all sound a bit confusing but fear not as we’ve created this handy graphic that explains it all:

The tile industry uses the draft informative index (ISO 10545) classification of Ceramic Tiles according to their slip resistance. This classification is determined by testing tiles in both wet and dry conditions prior to installation. An understanding of the measurement of the coefficient of friction and the importance of slip resistance for different types of Anti-Slip Tiles is essential to avoid and reduce the risk of slip related incidents.

The Two Classes Within The ISO Standard:

CLASS 1 <0.4 dynamic Coefficient of Friction

CLASS 2 >0.4 dynamic Coefficient of Friction

Below is a rundown of how the ‘R’ ratings covered in the graphic fit into the COF classification

R9 <0.2 COF:

Mainly smooth glazed tiles which will record this low value when wet. These tiles should only be used in dry areas and should be excluded from wet environments.

R10 >0.2 COF<0.4 COF:

Generally glazed tiles which show these values only when wet, although it is possible for unglazed tiles to fall into this classification too. Thes tiles may be considered for domestic areas such as kitchens, and other dry areas.

R11 + R12 >0.4 COF<0.7COF:

Tiles falling into this classification will include some glazed tiles and most unglazed tiles. If a tile has this CoF as a minimum, dry and wet, it may be regarded as safe for installations including bathrooms, kitchens, porches, hallways, cloakrooms, utility rooms and living rooms. They may also be suitable for installation in public areas such as WCs, communal showers, swimming pools, cloakrooms, and expansive areas such as shopping centres, airports, and hotel foyers.

So, if you’re looking to tile your bathroom or kitchen then you want to opt for floor tiles with an R11 rating such as Super White Polished, Madeira Titanium or Lounge Ivory. For multi-use areas such as living spaces that flow into dining areas, R9 rated tiles will suffice but you might want to plump for some R10 rated tiles like our Roma Light Grey, Doblo Matt Light Grey, or Hammered Slate.

For those of you out there who are business owners about to kit out a commercial premises you might want to take a look at our Doblo Rock, and Dunsen ranges  – they’re R11 rated and will not only ensure slips are avoided but are also incredibly stylish and durable too!

If outdoor tiles are more your thing then our Portico range of large format porcelain tiles all have slip ratings of R11 and above, making them ideal for patios, verandas, outdoor kitchens, and even poolside areas.

If you require any further information about slip ratings or advice on which tiles to choose for your project, give our friendly customer services team a call on 01782 223822 and they’ll be happy to help.

Dean heads up the content team here at Tile Mountain, commissioning, editing and sometimes even writing some of the incredibly useful and entertaining content we bring to you on a regular basis. With a background in consumer journalism and a raft of content marketing experience gained from working with huge brands spanning mobile tech and automotive, right through to professional sports and lifestyle sectors, he knows a thing or two about creating content that people love to engage with. Dean also holds the mantle of being our resident grammar pedant, but when he’s not getting angry about dangling participles he spends his spare time going to gigs, watching his beloved Stoke City FC, and adding to his collection of deadstock adidas trainers.

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