Short answer
In Australia, floor tiles are tested for slip resistance and given a P rating from P0 (lowest) to P5 (highest). Outdoor areas that get wet, such as alfresco areas, porches and paths, generally need a higher rating than indoor floors, and pool surrounds and ramps higher again. Choose an outdoor-rated porcelain or natural stone, check its test certificate, and lay it with falls away from the house.
How P ratings work
Slip resistance of pedestrian surfaces is classified under AS 4586, using a wet pendulum test. The results are grouped into classes from P0 to P5. Standards Australia's handbook on selecting slip-resistant surfaces gives guidance on which classes suit which locations.
For most outdoor entertaining areas and paths in Melbourne, tiles rated P4 or P5 are the usual recommendation. Always ask for the product's slip test certificate rather than relying on a label that just says "outdoor".
Porcelain, natural stone or pavers?
- Outdoor porcelain: very low water absorption, hard-wearing and easy to clean. Many ranges come in a matching indoor finish for a seamless indoor-to-outdoor look.
- Natural stone such as bluestone or travertine: a classic Melbourne choice with a natural texture. Needs sealing and periodic re-sealing.
- Concrete and clay pavers: suit driveways, paths and larger areas, and are straightforward to repair.
Getting outdoor tiling to last
- A sound, well-prepared base with falls so water drains away from the house.
- Waterproofing under balconies and any tiled area above a room.
- Movement joints, because outdoor surfaces expand and contract with temperature changes.
- Exterior-grade adhesive and grout, and sealing for natural stone.
- Care in shaded, damp areas, which stay wet longer and can grow moss or algae.
Need this done properly?
ASA Tiling is based in Dandenong and works across Melbourne within 100 km. Call for a site visit and written quote.