Outdoor porcelain tiles are 20 mm-thick, frost-proof, anti-slip tiles engineered for UK patios, paths, terraces, pool surrounds and outdoor spaces of every size. Also sold as porcelain paving or patio slabs, they deliver the look of natural stone with near-zero water absorption (under 0.5%) and almost no maintenance. This guide covers everything you need before you buy - sizes, slip ratings, finishes, prices and installation.
What Are Outdoor Porcelain Tiles?
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"Outdoor tiles," "porcelain paving slabs" and "patio slabs" all describe the same product- the name just varies by retailer
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Standard outdoor thickness is 20 mm, double the thickness of indoor tiles
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Indoor tiles (8–12 mm) crack in UK frost and lack proper anti-slip grip - never use them outside
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The vitrified, kiln-fired body carries colour throughout the slab, so it won't fade
Why Choose Porcelain Paving Over Stone, Decking or Concrete?
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Frost-proof and weatherproof for year-round British weather
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Stain, moss and algae resistant - no sealing required
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UV-stable colour that holds year after year
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Suits a wide range of outdoor spaces - from compact courtyards to large dining terraces and driveways
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Built for long term performance in the British climate - no warping, rotting or fading like decking or stone
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Cleans with nothing more than water and mild detergent
Anti-Slip Outdoor Tiles - Understanding R Ratings
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R 11 is the standard safe rating for patios, walkways and pool surrounds
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R 10 suits covered or sheltered areas; R 12 for high-splash zones
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Textured finishes add grip while replicating natural stone
Outdoor Patio Tile Sizes Explained
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600 x 600 mm - ideal for small patios, courtyards and awkward layouts
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900 x 600 mm - the most popular UK size; fewer joints, contemporary scale
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1200 x 600 mm - large-format for premium, seamless indoor-outdoor patios
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Pair with matching indoor tiles for a flush threshold through bifold doors
Finishes & Styles
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Stone-effect (limestone, slate, granite)
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Wood-effect plank porcelain
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Concrete/industrial-effect
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Marble-effect - popular neutrals include grey, ivory-cream and charcoal
How Much Do Outdoor Porcelain Tiles Cost in the UK?
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Typical range: £18–£50 per m² inc VAT, depending on size, finish and supplier
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Porcelain paving slabs are commonly sold in 600 x 600, 900 x 600 and 1200 x 600 formats
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Always convert per-tile prices to price per m² inc VAT plus delivery before comparing
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Budget for adhesive, primer, grout and a 10% cutting/wastage allowance
How to Lay Porcelain Paving
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Build a compacted MOT Type 1 sub-base, then a mortar/screed bed with the correct fall for drainage
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Apply slurry primer to the back of each tile for adhesion
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Cut only with a wet saw and diamond blade - manual cutters chip 20mm porcelain
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Professional installation is recommended to get the base, drainage and joints right
Maintenance & Care
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Sweep regularly; wash with water and a mild detergent
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No sealing needed thanks to the non-porous body
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Naturally resists moss, algae and staining compared with natural stone
Frequently Asked Questions
Q1. Are outdoor porcelain tiles slippery when wet?
No. Quality outdoor porcelain tiles have textured, anti-slip surfaces and are typically R11 rated, giving reliable grip in wet UK conditions on patios, pathways and pool surrounds.
Q2. What thickness of porcelain tile do I need for a patio?
20mm is the standard thickness for outdoor porcelain paving. Indoor tiles at 8–12mm are too thin for mortar-bed installation and can crack in frost, so always choose 20mm outdoor-rated porcelain for patios, paths and driveways.
Q3. Can you lay outdoor porcelain tiles over concrete?
Yes. Outdoor porcelain can be laid over a sound concrete base using a suitable adhesive or mortar bed, as long as there is correct drainage and fall so water doesn't pool on the surface.
Q4. Do outdoor porcelain tiles need sealing?
No. Porcelain is non-porous with water absorption below 0.5%, so the tiles themselves never need sealing. Sealing the grout joints is sometimes recommended for extra protection.
Q5. How much do outdoor porcelain tiles cost in the UK?
Outdoor porcelain paving typically ranges from £18 to £50 per m² including VAT, depending on size, finish and supplier. Always compare prices per m² inclusive of VAT and delivery.
Q6. What is the most popular outdoor porcelain tile size?
900 x 600 mm is the most popular outdoor size in the UK for its contemporary scale and fewer joints. 600 x 600mm suits compact patios, while 1200 x 600mm gives a premium large-format finish.
Q7. Are porcelain tiles better than natural stone or sandstone for a patio?
For most UK gardens, yes. Porcelain is denser, less porous and more resistant to frost, stains and fading than sandstone, and it needs far less upkeep - no annual sealing or jet-washing of ingrained moss.
Q8. Can outdoor and indoor porcelain tiles match?
Yes. Many ranges offer a 20 mm outdoor version and a thinner indoor version in the same design, letting you run a seamless look from kitchen to patio through bifold or sliding doors.
Q9. Do outdoor porcelain tiles offer good long term performance?
Yes. With colour running through the slab, water absorption below 0.5% and frost resistance, outdoor porcelain delivers excellent long term performance - typically lasting decades with minimal upkeep, far outlasting timber decking or untreated natural stone.
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