In Australia, tile and paver slip resistance is rated under AS 4586 using a P-scale (P1–P5) for wet pendulum testing. Outdoor areas require a minimum P3 rating; pool surrounds need P5. The rating is measured on the finished, installed surface, not just the product spec sheet.
What Do P1, P3, and P5 Actually Mean?
If you have ever bought tiles or pavers in Australia and seen P3 or P5 on a product listing, you may have glossed over it. Most homeowners do, until a slip happens, or until a builder asks for a compliant spec. Here is what those numbers mean, in plain terms.
Australian slip resistance is governed by AS 4586:2013 (the Australian Standard for slip resistance classification of new pedestrian surface materials). It uses a Wet Pendulum Test to assign a P-rating to any surface that gets wet underfoot.
| Rating | Slip Risk Level | Typical Application |
| P1 | High slip risk | Not suitable for wet areas |
| P2 | Moderate risk | Dry indoor use only |
| P3 | Low risk (wet) | General outdoor paving, alfresco, paths |
| P4 | Very low risk | Wet outdoor areas, public footpaths |
| P5 | Lowest risk | Pool surrounds, commercial wet areas |
The higher the P-number, the more grip the surface provides underfoot when wet.
Where Each Rating Is Required in Australia
This is where most homeowners get confused. The rating required depends on where the tile or paver is installed, not just what it looks like. Here is a quick guide based on Australian Standards and common building compliance requirements.
- Indoor dry areas (bedrooms, living rooms): P1 or P2 is typically acceptable
- Bathrooms and wet rooms: P3 minimum; P4 recommended for shower floors
- Alfresco, balconies, and outdoor paths: P3 minimum under AS 1428.1
- Pool surrounds and wet deck areas: P5 mandatory for commercial; P5 strongly recommended for residential
- Pool coping: P4 minimum; P5 recommended across Victoria
If you are tiling a space that transitions from indoor to outdoor, a living room flowing to an alfresco, for example, your outdoor material must independently meet the P3 or P4 requirement. The indoor tile spec does not carry over. Read more about how to coordinate materials across that transition in our guide to creating a seamless indoor-outdoor flow.
Natural Stone vs Porcelain: Which Achieves Higher Slip Ratings?
Both natural stone and porcelain can achieve P5, but how they get there is different.
Natural stone (bluestone, travertine, sandstone) achieves slip resistance through its surface texture and finish. A sandblasted, honed, or tumbled finish on bluestone tiles and pavers naturally produces a grip texture that meets P4-P5. Polished stone, however, can drop to P1-P2 when wet, which is why polished marble floors belong indoors, not near pools.
Porcelain achieves slip resistance through the manufacturing process. A P5-rated outdoor porcelain paver has a micro-textured surface applied during firing that maintains grip in wet conditions. Atlas Tile & Stone’s outdoor porcelain pavers carry P5 anti-slip ratings, consistent across the entire batch, unlike natural stone where individual piece variation is normal.
For pool coping specifically, both materials can perform. See our full breakdown in stone vs. porcelain pool coping for Melbourne pools.
3 Things that Can Lower a Tile’s Slip Rating After Installation
This is the part most product guides leave out. A tile’s P-rating is tested on a clean, new surface in controlled conditions. In the real world, these three factors can reduce effective slip resistance over time:
- Incorrect sealing: Applying a surface sealer to a naturally textured stone tile can fill the micro-texture that provides grip, effectively lowering its in-use slip resistance
- Grout flush or overfill: Grout that sits proud of the tile surface changes how water disperses underfoot
- Dirt, algae, or mineral build-up: Particularly on travertine and limestone pavers outdoors, which can develop a biofilm if not cleaned annually
The fix is simple: use the correct sealer type for your material’s finish, keep grout flush with the tile face, and schedule annual cleaning for outdoor stone areas.
Slip Ratings and the R-Scale: What Is the Difference?
You may also see R-ratings (R9-R13) mentioned, particularly on German-made tiles or commercial porcelain products. This comes from a different test (the German DIN 51130 ramp test) and is not the same as the Australian P-scale.
In Australia, P-ratings under AS 4586 are the recognised standard. An R11 tile from a European spec sheet does not automatically equal a P4 or P5 in Australian compliance terms. Always ask your supplier for the AS 4586 rating specifically, not just the R-rating, before purchasing for an outdoor or wet area project.
Visit Our Cheltenham Showroom – We’ll Help You Get it Right
Choosing the right slip-rated tile or paver for your project is not just about ticking a compliance box. It is about finding a surface that performs safely, lasts the Melbourne climate, and looks exactly how you imagined.
Atlas Tile & Stone stocks bluestone, travertine pavers, outdoor porcelain pavers, and pool coping – all rated and selected for Australian outdoor conditions. Our team can advise you on the correct slip rating for every area of your project before you buy.
Visit: 6 Bricker St, Cheltenham VIC 3192 | Call: 03 9191 8756
Frequently Asked Questions
What slip rating do I need for outdoor tiles in Australia?
For general outdoor paving, including alfresco areas, garden paths, and entertaining decks, Australian Standards require a minimum P3 slip rating under AS 4586. For pool surrounds and consistently wet areas, P5 is the recommended standard for residential and mandatory for commercial installations. When in doubt, choosing P4 or P5 gives you a safer margin and better resale compliance. Atlas Tile & Stone clearly lists AS 4586 slip ratings across all outdoor tile and paver products.
Is P5 required for pool surrounds in Victoria?
Under the National Construction Code and Victorian building compliance guidelines, outdoor wet areas including pool surrounds should meet a minimum P4 slip rating, with P5 strongly recommended by builders and pool certifiers across Victoria. All porcelain pool coping at Atlas Tile & Stone carries a P5 anti-slip finish. Natural stone pool coping options including bluestone pool coping are finished to an equivalent P4-P5 standard through sandblasting or rough honing.
Does the finish on natural stone affect its slip rating?
Yes, significantly. The same stone in different finishes can carry very different slip ratings. A polished travertine tile may be P1-P2 when wet, making it unsuitable for outdoor or wet areas. The same travertine in a tumbled or honed finish can achieve P3-P4. For pool areas and outdoor paving, always specify a sandblasted, brushed, or tumbled finish on natural stone and confirm the AS 4586 rating with your supplier before ordering.
Can I use the same slip-rated tile inside and outside?
Not directly; the same tile specification is unlikely to suit both environments. Indoor tiles are typically 10-12mm thick with a smoother finish, while outdoor-rated tiles need 20mm thickness and a minimum P3 slip surface. However, you can use the same material family – for example, a honed limestone tile indoors and a sandblasted limestone paver outside to achieve visual continuity with the correct rating in each zone. Our team at the Cheltenham showroom can help you coordinate both.