Tile Slip Ratings Explained: R-Ratings, P-Ratings and Where Each One Belongs

A tile can look perfect and still be the wrong choice if it turns into a skating rink when it is wet. Slip resistance is measured, rated and worth understanding, especially around pools and in bathrooms. Here is what the ratings actually mean, in plain English.

Two rating systems, one goal

In Australia you will run into two systems, and they test slightly different things:

• P ratings, P0 to P5. From the wet pendulum test, this is the one specified for most projects here. Higher is grippier. P3 suits general and covered outdoor areas; P4 and P5 are for wet, sloped and barefoot-heavy zones like pool surrounds.
• R ratings, R9 to R13. From a German ramp test done in boots. R10 is a safe all-rounder for indoor wet areas; R11 and up is the outdoor and commercial end. You will see R ratings quoted on a lot of imported ranges.

Both are trying to answer the same question: how much grip does this tile give when it is wet and someone is moving across it?

Which rating for which zone

A simple way to think about it, zone by zone:

• Bathroom and ensuite floors: aim for P3 to P4, around R10. Grippy underfoot when wet, still comfortable barefoot.
• Shower bases: small-format or textured tiles, since more grout lines mean more grip.
• Laundries and internal wet areas: P3 or better.
• Covered alfresco and patios: P3 to P4.
• Pool surrounds and coping: P4 to P5, and ideally a barefoot-friendly finish that grips without shredding wet feet.
• Ramps and steep external paths: the highest you can get, up around P5 or R12 to R13.

The barefoot catch

Here is the thing the ratings do not fully capture: a heavily textured tile can grip brilliantly but feel like sandpaper on bare feet, and it will trap dirt in every groove. Around a pool you want the sweet spot, enough grip to be safe when wet, smooth enough to walk on, and easy to hose clean. That balance is exactly what a purpose-made grip or in-out porcelain is built for.

Grip does not mean giving up the look

You no longer have to choose between safe and beautiful. Plenty of ranges now come in a smooth inside version and a matched grippy in-out or grip version of the same colour, so you can carry one look from the living room to the pool without a jarring change in tile. Run the smooth face inside and the grippy face where it gets wet.

Not sure? Bring it to us

Slip ratings are easy to get wrong on paper. Tell us the zone, whether that is pool coping, a shower floor or a shaded alfresco, and we will point you to a finish that is safe and still looks the part. For the bigger outdoor picture, our Sunshine Coast outdoor tiles guide is a good next read, or just browse the range.