Patios & Paving Questions

Sinking or shifting paving almost always points to a failed sub-base. If the hardcore layer beneath the slabs or blocks was too shallow, poorly compacted, or laid over unstable soil, it breaks down under load and foot traffic. Clay-heavy ground that swells and shrinks with moisture makes this worse. Proper excavation and a compacted MOT Type 1 sub-base are what prevent it.

A correctly laid patio is given a fall of at least 1:80 away from the house, so surface water runs clear rather than pooling. If your existing patio holds water, the fall is either absent or the wrong direction. Permeable jointing or a drainage channel at the edge can also help on plots where water naturally collects. Drainage groundwork can be assessed separately.

Clay ground expands when wet and shrinks when dry, which pushes and pulls at the sub-base over time. A patio can stay level on clay if the excavation goes deep enough, a geotextile membrane separates the clay from the hardcore, and the sub-base is well compacted. Adding a drainage channel or soakaway at the edge reduces moisture movement in the clay beneath. Drainage groundwork is often worth addressing at the same time.

Groundwork elements are quoted separately, so if excavation reveals unexpected issues, deep soft spots, buried rubble, or drainage problems, those are scoped and priced before extra work proceeds. You are not committed to unquoted costs. Drainage work, for example, is quoted as its own item rather than absorbed into the paving price.

Area size, material choice, and sub-base depth are the main factors. Porcelain and natural stone cost more per square metre than concrete slabs or standard block paving. Ground conditions matter too, soft or clay-heavy soil needs deeper excavation and more hardcore. Access, pattern complexity, and any drainage work are each quoted as separate items.

Concrete slabs are generally cheaper per square metre than block paving when you factor in both materials and labour. Block paving takes longer to lay because of the smaller units and pattern work, which adds to the labour cost. Natural stone slabs sit at the higher end regardless of format. The gap narrows on smaller areas where material cost dominates.

Yes, block paving works well on a patio, particularly if you want a traditional or herringbone pattern, or if the area doubles as off-road parking. It does require more regular weeding of joints and occasional re-sanding. For a purely decorative garden patio, large-format slabs often need less upkeep and give a more contemporary look.

Porcelain slabs are frost-proof, low-maintenance, and suit modern gardens. Natural stone such as sandstone or limestone suits traditional or cottage-style plots but needs sealing. Concrete slabs are cost-effective for larger areas. Block paving in clay or concrete suits driveways and period properties. The right choice depends on your house style, budget, and how the space will be used.

Contemporary homes generally suit large-format porcelain or smooth concrete slabs in grey or charcoal tones. Older or brick-built properties often look better with tumbled sandstone, buff concrete, or clay block paving. The garden’s planting style matters too, a cottage garden pairs better with warm-toned natural stone than with stark grey porcelain.

Most paving materials work across all three uses, but the sub-base depth and bedding method change. A driveway needs a deeper MOT sub-base and thicker blocks or slabs rated for vehicle load. A path needs a stable but shallower base. A patio sits between the two. The right specification is confirmed once the intended use and ground conditions are assessed.

Porcelain slabs need the least upkeep, a brush and occasional jet wash keeps them clean. Natural stone needs sealing every few years to resist staining. Block paving needs joint sand topped up periodically and weeding of joints. All paving benefits from clearing moss and algae before it builds up, particularly in shaded or damp spots.

Slabs suit most domestic patios: they lay faster, cost less per square metre, and give a clean, low-maintenance finish. Block paving is better where you want a traditional or intricate pattern, or where the surface will take vehicle weight. For a straightforward garden patio, large-format slabs in porcelain or natural stone are usually the more practical choice.

Slabs are large, flat units, typically 600x600mm or bigger, bedded on mortar or a sand-cement mix. Block paving uses smaller, thicker units (usually 200x100mm) laid on compacted sharp sand and kiln-dried sand-jointed. Blocks interlock and can flex slightly, making them better for driveways. Slabs are quicker to lay and suit patios and paths.

Paving looks straightforward but fails quickly without correct sub-base depth, compaction, and falls. A handyman or DIY approach often skips the 100-150mm compacted hardcore layer that prevents sinking. Poorly set falls cause pooling. Fixing sunken or flooded paving costs more than getting it right first time, because the whole surface has to come up.

Permeable paving helps on a wet plot by letting surface water pass through rather than run off, but it only works if the ground beneath can absorb it. On a low-lying plot with a high water table or heavy clay, the water has nowhere to go and the sub-base can become saturated. A drainage channel or soakaway alongside the paving is usually more effective than relying on permeability alone.

The ground is assessed during the initial site visit. Soft spots, high clay content, tree roots, or a history of waterlogging all signal that deeper excavation or a geotextile membrane is needed before any sub-base goes down. Skipping this step is the single most common reason paving fails within a few years.

Check the ground conditions first, clay, soft soil, or poor drainage will affect the sub-base needed. Measure the area accurately and note any falls or slopes. Confirm whether the surface will take vehicle weight. Then consider the house style, maintenance preference, and budget before selecting a material and finish.

A standard patio up to around 30 square metres typically takes two to four days, including excavation, sub-base, and laying. Larger areas, complex patterns, or ground that needs extra preparation will take longer. Mortar-bedded slabs need 24-48 hours to cure before the surface is walked on.

Excavation produces spoil that is removed from site, and materials are stored as compactly as possible. Dust and debris are kept to the working area. At the end of each day the site is left safe and reasonably clear. Final clean-up, including removing cement residue and brushing joints, happens once the paving is fully set.

Frost-resistant materials matter most, porcelain rated R11 or above and engineering-quality concrete slabs handle freeze-thaw cycles without cracking. Natural stone should be sealed to prevent water ingress. Laying should not happen when ground temperature is below 3°C, as mortar will not cure correctly. A well-compacted sub-base also reduces frost heave by limiting moisture retention beneath the slabs.

Slabs give a larger, flatter look with fewer joints. Block paving uses smaller units and allows more pattern options. Block paving is also easier to lift in sections if access to pipes or inspection chambers is needed later. The right choice depends on the look, the space, and how much maintenance you want.

Cracked or uneven slabs let water into the base layer. Over time the sub-base erodes further, the area of movement grows, and the eventual repair scope, and cost, increases. A small sunken section left through winter on clay ground typically worsens significantly by spring.

Most domestic patio installations do not need planning permission. However, if the work affects how surface water drains, particularly on front gardens, permitted development rules apply. The landscaper will flag this during the survey before work begins.

Consider the intended use, slab thickness, frost resistance, and how much maintenance you are prepared to do. Porcelain needs little upkeep; sandstone needs sealing. Also check whether the ground conditions require a deeper build-up, which affects the overall cost regardless of material chosen.

For a front driveway over 5 square metres, permitted development rules require the surface to drain naturally, either permeable paving or drainage directed to a lawn or border. If it drains to the road or a soakaway, planning permission is needed. Rear patios and garden areas are not normally subject to the same rules, but listed buildings and conservation areas are exceptions.

No, permeable paving on a front driveway falls within permitted development, so no planning application is required. Permeable block paving, resin-bound gravel, and open-jointed slabs all qualify. This is the simplest way to avoid the planning requirement while still getting a hard-wearing, attractive surface.

Our partners are vetted independent local landscapers. You should confirm public liability insurance directly with the partner quoted for your job before work starts, any reputable paving contractor carries it as standard. Ask to see the certificate before signing off the work.

Guarantee terms are set by the individual partner contractor carrying out your work. Ask for the guarantee period and any conditions to be confirmed in writing before work begins. A properly laid patio with a compacted sub-base and correct falls should not sink, shift, or pool water within the first several years under normal use.

For a front garden or driveway, yes, a non-permeable surface over 5 square metres requires planning permission unless water drains to a lawn, border, or soakaway rather than the road. Rear garden patios are not subject to the same rule in most cases. If in doubt, check with the local planning authority before laying begins.