Is porcelain or natural stone better for a patio?

Neither is universally better — it depends on the site and the look you want. Porcelain is denser, almost stain- and frost-proof, near maintenance-free and dimensionally consistent, which makes it ideal for contemporary patios, shaded north-facing gardens and anyone who wants low upkeep. Natural stone (sandstone, limestone, granite) gives a warmer, riven, characterful finish that suits period and rural properties, but it is more porous, usually needs sealing and weathers over time. For a busy family patio in shade, porcelain often wins; for a traditional cottage garden, natural stone usually looks more at home.

How thick should porcelain and natural stone slabs be?

Outdoor porcelain paving is almost always 20 mm thick and calibrated to a consistent thickness, so the bedding stays even. Natural stone is thicker and more variable: calibrated Indian sandstone and limestone are typically around 22 mm, hand-dressed or riven stone can range from 18–35 mm, and granite setts/slabs are often 20–30 mm. Because natural stone varies, you adjust each slab into a full mortar bed to bring the surface to a true level — you can't simply screed a fixed bed depth as you can with calibrated porcelain.

How are porcelain and natural stone jointed differently?

Both are best pointed with a brush-in resin jointing compound, but joint widths differ. Porcelain has crisp, sawn edges so it's laid with tight, consistent 3–5 mm joints. Natural stone has slightly irregular edges and is usually laid with wider 8–12 mm joints to absorb the variation. Use a jointing compound rated for narrow joints on porcelain (many standard compounds need a minimum 5 mm joint and depth), and always prime porcelain's back face with an SBR slurry before bedding — natural stone doesn't need a slurry primer.

How much waste should I allow for each material?

Allow about 10% extra for straightforward stretcher-bond or grid layouts in either material. Natural stone in mixed-size 'patio packs' often needs a touch more planning but a similar 10%. Increase to 12–15% for porcelain laid in diagonal (45°) patterns, lots of curves, circles or small/awkward areas, because porcelain is harder to cut and offcuts are less reusable. Order all of one material in a single batch so colours, thicknesses and shades match, and keep a few spare slabs for future repairs.

Is porcelain harder to cut than natural stone?

Yes. Porcelain is extremely dense and must be cut with a continuous-rim diamond blade, ideally on a wet cutter, and chipped edges show easily, so cuts need care. Natural stone is softer and more forgiving to cut and dress, and small chips blend into the riven texture. Factor the slower cutting into your time (and waste allowance) when planning a porcelain patio with lots of cuts.

Does natural stone need sealing and porcelain not?

Broadly yes. Most natural stone is porous and benefits from sealing to resist staining, algae and salt damage — sandstone and limestone in particular. Porcelain is effectively non-porous (water absorption under 0.5%), so it doesn't need sealing and resists stains, frost and algae with just a wash down. This is a key reason porcelain is popular for shaded, north-facing or low-maintenance patios.

Which is more expensive, porcelain or natural stone?

Premium porcelain and premium natural stone overlap heavily on price. Budget Indian sandstone is usually the cheapest option; mid-range porcelain sits above it; high-end porcelain and granite are at the top. Remember the whole-job cost: porcelain needs an SBR slurry primer and slower cutting, while natural stone often needs sealing and may need more bedding adjustment for varying thickness. Use the patio build-up calculator to compare total material quantities and cost for your exact area.

Porcelain vs Natural Stone Patio — UK Comparison Guide

Porcelain and natural stone are the two most popular patio surfaces in the UK, and the choice changes everything downstream — the bedding, the joint width, how much you cut and waste, and how much maintenance you sign up for. This guide compares them on the things that actually affect the build, then helps you decide which suits your site.

At a glance

Typical thickness

Porcelain: 20 mm, calibrated (consistent)
Stone: 18–35 mm, often ~22 mm calibrated; riven varies

Bedding

Porcelain: Full wet mortar bed + SBR slurry primer
Stone: Full wet mortar bed (no primer)

Joint width

Porcelain: Tight 3–5 mm
Stone: Wider 8–12 mm

Cutting

Porcelain: Hard — wet diamond blade, chips show
Stone: Softer, forgiving, chips blend in

Wastage allowance

Porcelain: 10% (12–15% for diagonal/curves)
Stone: ~10%, plan mixed-size packs

Maintenance

Porcelain: Wash only — no sealing
Stone: Seal against stains/algae; reseal periodically

Porosity / frost

Porcelain: Non-porous (<0.5%), frost-proof
Stone: Porous; quality varies; seal recommended

Look

Porcelain: Crisp, uniform, contemporary
Stone: Riven, characterful, traditional

Best for

Porcelain: Shaded, modern, low-maintenance gardens
Stone: Period/rural homes, natural look

Feature	Porcelain	Natural stone
Typical thickness	20 mm, calibrated (consistent)	18–35 mm, often ~22 mm calibrated; riven varies
Bedding	Full wet mortar bed + SBR slurry primer	Full wet mortar bed (no primer)
Joint width	Tight 3–5 mm	Wider 8–12 mm
Cutting	Hard — wet diamond blade, chips show	Softer, forgiving, chips blend in
Wastage allowance	10% (12–15% for diagonal/curves)	~10%, plan mixed-size packs
Maintenance	Wash only — no sealing	Seal against stains/algae; reseal periodically
Porosity / frost	Non-porous (<0.5%), frost-proof	Porous; quality varies; seal recommended
Look	Crisp, uniform, contemporary	Riven, characterful, traditional
Best for	Shaded, modern, low-maintenance gardens	Period/rural homes, natural look

Thickness & bedding

Outdoor porcelain is almost always 20 mm and calibrated to a tight tolerance, so you can screed a consistent mortar bed and lay quickly. Its dense back face must be coated with an SBR slurry primer before bedding, or the slab won't bond and will eventually lift.

Natural stone is thicker and more variable — calibrated sandstone and limestone are around 22 mm, while riven and hand-dressed stone can range 18–35 mm. Because thickness varies slab to slab, you lay on a full wet mortar bed and adjust each piece down into the bed to a true surface level. Allow a deeper bed and a little more bedding material than you would for porcelain.

Jointing

Porcelain's sawn edges are laid with crisp, tight 3–5 mm joints; natural stone's irregular edges suit wider 8–12 mm joints that absorb the variation. Both are best finished with a brush-in resin jointing compound, but check the product's minimum joint width and depth — many standard compounds need at least a 5 mm joint and won't sit reliably in porcelain's tightest gaps, so choose a narrow-joint grade for porcelain.

Wastage & cutting

Allow ~10% extra on the measured area for both materials in simple grid or stretcher-bond layouts.
Increase porcelain to 12–15% for diagonal (45°) patterns, circles, curves or lots of small cuts — it's hard to cut and offcuts are rarely reusable.
Porcelain needs a continuous-rim diamond blade (ideally a wet cutter); chipped edges show, so allow extra time as well as extra slabs.
Natural stone is softer and more forgiving — small chips blend into the riven texture — but mixed-size 'patio packs' need laying out before you start.
Order each material in a single batch for colour/shade and thickness consistency, and keep a few spare slabs for future repairs.

When porcelain wins

Shaded, north-facing gardens prone to algae and green film
Contemporary homes wanting a crisp, uniform finish
Low-maintenance patios — no sealing, just a wash down
Around pools, kitchens and dining areas where stains matter
Exposed sites where frost resistance is critical

When natural stone wins

Period, cottage and rural properties wanting a traditional look
Warm, riven texture with natural colour variation and grip
Budget Indian sandstone for the lowest material cost
Curved or organic patio shapes that are easier to cut to fit
Where you want the patio to mellow and weather over time

Porcelain, natural stone & jointing — get prices

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Frequently asked questions

How to lay a patio Patio build-up calculator Sub-base specifications guide All guides