Adelaide summers get all the attention, but it is winter that tests an outdoor tiled area. Cold nights, frost in the Hills and weeks of wet weather will find any weakness in the tile choice, the drainage or the installation. Get those right and your patio, alfresco or pool surround shrugs off winter for decades.
This guide explains how to winter-proof outdoor tiling, and it is part of our complete outdoor, pool and splashback tiling guide.
Start with a frost-resistant tile
The single biggest factor is the tile itself. Outdoor tiles have to cope with water getting into and onto them, then the temperature dropping. If a tile absorbs water and that water freezes, it expands and can crack or spall the tile from the inside.
The answer is a tile with very low water absorption, which is why dense external-grade porcelain is the go-to for Adelaide outdoor areas. Cheap or indoor-rated tiles used outside are a false economy, and no amount of sealing makes them suitable. Our guide to the best tiles for Adelaide's climate covers what to look for.
Water absorption and frost resistance
When you are choosing outdoor tiles, two things matter for winter:
- Water absorption: the lower the better. Frost-resistant porcelain typically sits under 0.5%, meaning there is very little water to freeze and expand.
- Frost rating: look for tiles specifically rated as frost resistant if the area sees genuinely cold nights, which is common in the Adelaide Hills and the higher, cooler suburbs.
These ratings are exactly the kind of thing a good tiler checks before quoting, so the tile suits the spot it is going.
Drainage: never let water pool
Winter-proofing is as much about water management as it is about the tile. Water that pools on a surface, sits in low spots or has nowhere to drain is what causes the damage. A well-laid outdoor area is set with a slight fall so water runs off to a drain or garden edge rather than sitting on the tiles or soaking into the joints.
Poor falls are one of the most common outdoor tiling faults, and they only show up when the weather turns. It is worth getting right the first time.
Movement joints stop cracking
Outdoor tiling moves far more than indoor tiling because the temperature swing is so much bigger, from a hot afternoon to a frosty night. Without somewhere to absorb that movement, tiles push against each other and eventually tent, lift or crack.
Movement joints, placed correctly through the field and at the edges, give the surface room to expand and contract. They are easy to overlook and expensive to retrofit, so they belong in the original job. If you have seen tiles peak or lift over a season, movement is usually the cause.
Slip safety matters more in winter
Wet, cold tiles are slippery tiles. A surface that is fine in summer can become a hazard when it is covered in winter rain, so slip rating is part of winter-proofing too. Steps, pool surrounds and shaded areas that stay damp need a higher slip rating. Our guide to slip-rated tiles and R ratings explains how to match the rating to the spot.
Sealing natural stone
If you have chosen natural stone rather than porcelain, sealing becomes important before winter. Stone is more porous, so a good sealer helps it shed water and resist staining through the wet months. See sealing outdoor and natural stone tiles for how and when to do it. Remember, though, that sealing supports a suitable stone, it does not make an unsuitable tile frost proof.
Get it right before winter
Winter-proofing is not one thing, it is the right tile, proper drainage, movement joints, slip safety and, for stone, sealing, all working together. Miss one and winter will find it.
If you are planning an outdoor area or worried an existing one will not last the season, tell us about the job and we will connect you with vetted Adelaide outdoor and pool tilers who build for the local climate. Comparing a couple of free quotes is the easiest way to get it done properly.