Patio materials compared: natural stone, porcelain and block paving

Natural stone

Natural stone, such as sandstone, limestone, slate or granite, varies in colour and texture from slab to slab, so no two patios look quite the same. It ages and weathers naturally, which many people prefer.

Stones differ in how porous they are. Some benefit from sealing, and all outdoor paving can grow algae in damp shade, so expect to clean it. Slabs can be uneven in thickness, so laying takes skill.

Porcelain

Porcelain paving is dense and absorbs very little water, so it resists staining, and its look is consistent from slab to slab. It is available in finishes that imitate stone or timber, or in plain modern colours.

It is hard to cut and needs correct bedding, often with a specific primer or adhesive, so it suits installers who know the material. Outdoor porcelain is often around 20 millimetres thick.

Block paving

Block paving uses small concrete or clay blocks laid on a sand bed and locked together with jointing sand. It suits paths, driveways and curved areas, and a damaged block can be lifted and replaced.

It relies on a sound base and edge restraint, as a weak base lets it settle. Weeds can grow in the joints, and permeable block paving is available when drainage is a concern.

Side by side

A quick comparison of the three:

• Look: stone is varied and natural, porcelain is uniform and crisp, block paving is patterned and traditional.
• Upkeep: stone may need sealing and cleaning, porcelain is the lowest-maintenance, block paving may need re-sanding of joints and weeding.
• Repairs: block paving is the easiest to repair in small sections.
• Best for: stone for character, porcelain for a clean modern terrace, block for paths and driveways.

What matters more than the material

A patio is only as good as what lies beneath it. A compacted base, correct levels and a slight fall so water runs away from the house matter more to how it lasts than the paving you choose.

Think about drainage, shade, how much you will use the space and what the neighbouring house and garden look like. Ask for a written quote that names the material and the base so you can compare like with like.

Do you need permission for a patio?

Planning Portal says that away from the front garden there are no restrictions on the area of land you can cover with hard surfaces at or near ground level, though significant embanking or terracing may need a planning application. Front gardens have their own rules, and listed buildings need consent for significant works.