White Outdoor Porcelain Paving: The R11 Patio Upgrade Guide
White Outdoor Porcelain Paving: Laying and Buying Guide to Roca & Rastone R11
White outdoor porcelain paving has become the standard choice for UK patios and terraces over the last few years, largely because 2cm porcelain slabs handle rain, frost and UV exposure in a way that older concrete and natural stone paving simply can’t match without regular sealing. This guide compares the Roca and Rastone R11 ranges and walks through how a typical outdoor installation is actually put together.
For this reason, white outdoor porcelain paving is a practical choice for homeowners who want a bright patio without a demanding maintenance routine. Its non-porous surface makes everyday cleaning straightforward, while the matt finish helps reduce the appearance of minor marks between deeper cleans.
Why 2cm Porcelain Replaced Traditional Paving
Standard indoor porcelain is typically 9–10mm thick, which is nowhere near strong enough to sit outdoors under its own weight without a full mortar bed and rigid support. Outdoor porcelain paving is manufactured at 2cm thickness specifically so it can be laid using looser, more flexible methods sand, gravel, grass or raised pedestals while still bearing foot traffic, garden furniture and occasional vehicle loads on driveways.
Because porcelain has extremely low water absorption, it also resists the freeze-thaw cracking that affects some natural stone and older concrete paving in a typical UK winter, where water trapped in a porous surface expands as it freezes and gradually breaks the material apart.
Roca vs Rastone: Comparing the Two Ranges
Both ranges share the same core specification white, matt, R11-rated, 2cm thick but differ in format and finish character. Scroll the table below to compare them directly.
| Range | Formats available | Thickness | Slip rating | Character |
|---|---|---|---|---|
| Roca White Matt | 60x90cm | 2cm | R11 | Larger rectangular slab, fewer joints across a big patio |
| Rastone White Matt | 60x90cm, 60x60cm | 2cm | R11 | Available in a square format too, useful for smaller or irregular areas |
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The Roca White Matt R11 Porcelain Outdoor Floor Tile 60x90x2cm is a strong default for a large, open patio, since the rectangular format covers more ground per slab and reduces the total number of joints. The Rastone White Matt R11 Porcelain Outdoor Floor Tile 60x90x2cm matches that same format, while the Rastone White Matt R11 Porcelain Outdoor Tile 60x60x2cm gives a square alternative that’s often easier to plan around an awkward garden shape, steps or a narrow side passage.
How R11 Outdoor Slabs Are Typically Installed
Unlike indoor tiling, outdoor porcelain paving is usually laid using one of three approaches, chosen mainly by budget, drainage needs and whether the paving sits directly on soil or over an existing hard surface.
| Method | Best for | Key requirement |
|---|---|---|
| Full mortar bed | Driveways, high-traffic patios | Compacted sub-base and full adhesive coverage |
| Sand or grit bed | Garden patios, informal paths | Consistent fall for drainage, edge restraints |
| Raised pedestal system | Roof terraces, balconies, decking over drainage | Level structural base, adjustable pedestal heights |
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Whichever method is used, a slight fall usually around 1–2% away from the house is essential so that rainwater drains off the surface rather than pooling against a doorway or wall. Joint width also matters more outdoors than in: a joint of roughly 5–10mm, filled with a suitable outdoor jointing compound, lets water pass through rather than sitting on the surface.
Matching R11 to Different Outdoor Areas
R11 is the slip rating most UK suppliers recommend for genuinely exposed outdoor surfaces, since it offers meaningfully more grip in the rain than an indoor-rated R9 or R10 tile. That said, not every outdoor area carries the same level of risk, and it’s worth thinking through where the paving will actually sit.
- Open patio or terrace regular rain exposure, R11 recommended as standard.
- Pool surround frequent standing water and bare feet, R11 with a textured finish is the safer specification.
- Covered outdoor kitchen or pergola area less direct rain exposure, but R11 still gives a comfortable margin of safety.
- Garden path or step landing particularly important given the consequence of a slip on a step; R11 is the sensible minimum here.
The Health and Safety Executive notes that wet conditions are one of the most common contributing factors in slip incidents, which is exactly why outdoor paving specifications tend to sit a rating higher than the equivalent indoor product.
Colour and Design Continuity From Kitchen to Garden
One of the reasons white outdoor porcelain has become so popular is how naturally it extends an indoor white floor out through bi-fold or sliding doors. Choosing a Roca or Rastone R11 slab in a tone close to an indoor white porcelain floor creates a visual “flow” between kitchen and garden that architects and designers frequently point to as one of the details that makes an extension or renovation feel considered rather than simply functional.
The Royal Institute of British Architects (RIBA) publishes general guidance on indoor-outdoor living design for UK homes, much of which touches on exactly this kind of material continuity between adjoining internal and external floor levels.
- Confirm R11 rating for any genuinely exposed outdoor area.
- Choose 60x90cm for larger, open patios; 60x60cm for smaller or irregular spaces.
- Plan a 1–2% fall away from the house for drainage.
- Agree the installation method (mortar, sand or pedestal) before ordering.
- Order 10% extra for cuts around edges and steps.
- Match tone to an adjoining indoor floor for visual continuity.
Maintaining Outdoor Porcelain Paving
Outdoor porcelain needs very little upkeep compared with natural stone or concrete paving. Because the surface doesn’t absorb water, algae and moss tend to sit on top rather than embed into the material, which makes them noticeably easier to remove with a stiff brush and a mild outdoor cleaner. A pressure washer on a moderate setting is generally safe for periodic deeper cleans, though jointing material should always be checked afterwards and topped up if it’s been disturbed.
Unlike timber decking or painted paving, there’s no resealing or recoating cycle to plan for the surface that’s installed on day one is, in practical terms, the surface you’ll still have in ten years, provided the joints are kept in reasonable condition.
Frequently Asked Questions
Can I lay 2cm porcelain slabs directly onto grass or soil?
Yes, using a compacted sub-base system designed for grass or gravel installations, but the ground still needs proper preparation and a stable base beneath the slabs rather than being laid straight onto untouched soil.
What size joint should I leave between outdoor slabs?
A joint of roughly 5–10mm is typical for outdoor porcelain, filled with a suitable outdoor jointing compound that allows water to drain through rather than pool on the surface.
Is Roca or Rastone better for a large patio?
Both share the same R11 specification. Roca’s 60x90cm format and Rastone’s matching 60x90cm option both reduce joint count on a large patio; Rastone additionally offers a 60x60cm size for tighter or irregular areas.
Do outdoor porcelain slabs need sealing?
No. Porcelain’s very low water absorption means it does not require sealing, unlike some natural stone paving which needs periodic resealing to resist staining and frost damage.
Can these tiles be used on a raised roof terrace?
Yes, 2cm outdoor porcelain is commonly used with raised pedestal systems on roof terraces and balconies, which also allow drainage to run freely beneath the paving.
