How long does concrete take to cure, and when can I use it?

Concrete hardens quickly (it's walkable in 24-48 hours) but cures slowly. Full curing takes 28 days, and you shouldn't put heavy loads on it (vehicles on a driveway, for example) until then. Your contractor should give you a curing schedule. In Welsh weather, the initial set can be slower because it's often cold and damp. They might recommend a curing compound (a spray that seals moisture in) if conditions are poor. Once it's cured, concrete lasts decades if installed properly. Don't be tempted to drive on a new driveway early — it'll damage the surface and shorten its life.

Why do concrete driveways crack, and what can I do about it?

Cracks happen for three main reasons: ground movement (especially on clay), poor ground prep, or the concrete shrinking as it cures. In Cardiff's clay soils, some cracking is almost inevitable if the ground isn't prepped properly. You can't prevent all cracks, but you can minimise them. Good contractors use control joints (deliberate cut lines) to direct where cracks form — they'll be neat and predictable rather than random. If cracks appear within the warranty period (usually 2-5 years), contact your contractor. Small hairline cracks (under 2mm) are cosmetic. Wider cracks or ones that worsen suggest a problem that needs investigating.

Do I need to seal my concrete driveway?

No, not immediately. Modern concrete doesn't require sealing to last. However, sealing (usually done 2-3 years after laying) can help protect against staining and minor weathering, especially on clay-based soils where water retention is higher. It's optional but worth considering if you want to keep your driveway looking good. Sealing costs £150-£400 depending on size. Some contractors offer it; some don't. If appearance and longevity matter to you, ask whether they recommend it and get a quote. Unsealed concrete is fine — it will just weather and may stain over time.

What if my concrete sinks or becomes uneven after a few years?

Sinking or uneven concrete usually means the ground underneath has shifted or wasn't properly compacted initially. In Cardiff, this is often clay movement or poor base prep. If it's minor (under 15mm) and not affecting drainage, it's cosmetic. If it's significant or creating trip hazards, you've got options: have it professionally levelled (mudjacking or polyurethane injection), have it replaced, or (in some cases) use self-levelling compounds. Costs for levelling range from £300-£1,500 depending on area and severity. This is why ground prep and contractor choice matter — poor work becomes expensive to fix.

Is reinforced concrete worth it for a domestic driveway?

Reinforced concrete (using steel mesh or rebar) is stronger and cracks less than plain concrete. For driveways, it adds about £10-£15 per square metre but extends life significantly. It's worth it if you want the driveway to last 30+ years without major work. For temporary solutions or if budget is tight, plain concrete is adequate but will likely need repair sooner. Ask your contractor for their recommendation based on your soil type and expected use. In Cardiff's clay soils, reinforcement is often a good idea because ground movement stresses concrete more. Expect to pay extra but get longer durability in return.

Cardiff concrete & paving 2026

What You Need to Know About Concrete Work in Cardiff

Concrete work is one of those trades where corners cut early on cost you money later. Whether you're laying a new driveway, patching a garage floor, or pouring a foundation, getting it right matters. In Cardiff, we've got plenty of old housing stock, newer builds, and everything in between — and concrete problems aren't rare.

This guide walks you through what to expect when hiring a concrete contractor locally. We'll cover what jobs typically cost, which accreditations actually mean something, and the specific challenges Cardiff homeowners face with concrete. Most importantly, you'll learn the right questions to ask before you sign anything off.

Concrete isn't glamorous, but it's permanent. A badly installed driveway will crack and break up within a few years. Poor ground preparation under a shed base can lead to subsidence. So it's worth spending time finding someone who knows what they're doing, understands local soil conditions, and can back up their work with proper credentials.

The good news? Cardiff has a solid pool of trades people, and you don't need to be a surveyor to spot a dodgy job. Read on.

What Concrete Work Actually Costs in Cardiff

Concrete pricing in 2026 depends on the job type, labour time, and materials. Here's what you're realistic looking at:

Driveways: Expect £40-£65 per square metre for a standard concrete driveway, including excavation, base preparation, and finishing. A typical 30 square metre drive runs £1,200-£1,950. Reinforced concrete (stronger, longer-lasting) adds £10-£15 per square metre.

Garage floors and bases: Similar pricing, £35-£60 per square metre depending on floor condition and prep work needed. A 40 square metre garage floor is typically £1,400-£2,400.

Paths and patios: Usually £30-£50 per square metre. Small jobs (under 10 square metres) often carry a site visit or minimum charge of £150-£300.

Concrete repairs and patching: Spot repairs typically cost £200-£600 depending on size and depth. Larger areas might be quoted per square metre again.

Ground preparation: If your soil is poor or needs significant work, expect extra costs. Cardiff's mix of clay and former industrial sites means ground prep isn't always straightforward — budget an additional £300-£800 depending on what's found.

Always ask for a detailed quote that breaks down material costs, labour, waste removal, and any groundwork. Prices vary by postcode within Cardiff too — city centre work often costs more than outer areas. Get at least two or three quotes before deciding.

Accreditations That Matter for Concrete Work

Not all accreditations are equal. Here's what actually counts in the concrete trade:

CSCS Card (Construction Skills Certification Scheme): This is the standard across UK construction. Your concrete contractor should hold a valid CSCS card — it proves they've passed a health and safety test and have recognised training. Ask to see it. It's not a guarantee of quality, but it's a baseline.

ConstructionLine: This is a pre-qualification scheme for construction firms. If your contractor is ConstructionLine registered, they've been vetted for financial stability and insurance. Useful if you're hiring for larger projects.

NHBC Warranty or similar: If they're offering a structural warranty on concrete work (common for serious jobs), check who's backing it. NHBC is one option; there are others. Read the fine print — warranties often exclude poor ground preparation or water damage.

Concrete Society membership: Some specialists are members of the Concrete Society. It's not essential but shows they take their trade seriously and keep up with standards.

Public Liability and Employers Liability Insurance: Absolutely essential. Your contractor must have at least £6 million public liability. Ask for a copy of the certificate — not a promise, the actual document.

Local authority Building Control approval: For serious structural work, Building Control sign-off might be needed. Your contractor should know whether your job needs it and should budget for the inspection fees (typically £200-£400).

Don't assume a business with a nice website has any of these. Ask directly and verify.

Concrete Challenges Specific to Cardiff

Cardiff's geography and housing mix create specific concrete headaches. Understanding them helps you ask smarter questions.

Clay soil dominance: Much of Cardiff sits on clay subsoil. Clay moves seasonally — it expands when wet and shrinks when dry. This causes concrete to crack and shift over time, especially if ground prep was rushed. Any contractor worth their salt knows this and will spec a proper base layer (usually 100mm compacted stone minimum). Ask how they're accounting for clay movement.

Old industrial sites: Parts of Cardiff, particularly around former industrial areas and docks, have contaminated or unstable ground. If you're in these zones, ground investigation before concrete work isn't optional — it's sense. Your contractor should flag this concern.

High water table in low-lying areas: Splott, parts of Cathays, and areas near the bay have a higher water table. Concrete can be affected by rising damp. If your job is near a low point or near old watercourses, your concrete should have proper drainage consideration. Standard concrete alone isn't enough in these spots.

Welsh weather: We get rain. Lots of it. Good concrete finishing prevents water pooling and premature deterioration. Proper slope (at least 1 in 80) on driveways and paths is essential but sometimes skipped. Make sure your quote explicitly covers this.

Local Building Control: Cardiff Council's Building Control team is thorough. If your project triggers Building Control (most structural work does), they'll inspect. Your contractor should be familiar with local requirements and timescales — typically 2-3 working days for inspection booking.

How to Find and Hire a Concrete Contractor

Start with personal recommendations if you've got them. Ask neighbours, your builder, or local trades people. Word of mouth is gold in Cardiff.

If you're starting from scratch, use trade directories like besttrades.wales to find registered, vetted contractors locally. Check their reviews (look for specifics, not just star ratings) and whether they're members of recognised schemes.

Get at least three quotes. Not just prices — detailed quotes that explain what they're doing, what materials they're using, timescales, and payment terms. A one-line "£1,500 for driveway" isn't a quote; it's a guess.

Visit previous work if possible. Ask the contractor for photos or, better, sites you can drive past. Look for even finishes, no obvious cracks, and proper drainage on paths or driveways.

Check references. A decent contractor will happily give you two or three customer contacts. Ring them. Ask about weather delays (concrete can't be poured in frost), whether the job finished on time, and whether they've had any problems since.

Agree on payment terms upfront. Most concrete contractors ask for a deposit (20-30%) and the balance on completion. Don't pay everything upfront. Payment should be tied to work stages.

Get it in writing. A simple written agreement including scope, cost, timescale, insurance details, and payment terms protects both of you. It doesn't need to be fancy — a detailed email you both agree to counts.

Check insurance one more time. Before work starts, ask for an up-to-date insurance certificate. Don't start until you've seen it.

Eight Questions to Ask Before Hiring

What's your approach to ground preparation? Listen for talk of compaction, base layers, and drainage. On clay soil (common in Cardiff), they should mention accounting for soil movement.
Do you have CSCS and public liability insurance? Ask to see both. Insurance should be current and for at least £6 million public liability.
Will Building Control approval be needed, and who handles it? They should know whether your job requires it and whether they're applying or you are. Make sure costs are clear.
What's your concrete spec — strength, reinforcement, finishes? Different jobs need different concrete. They should explain why they're recommending what they are, not just guess.
How do you handle drainage and slope? On driveways and paths, proper slope prevents water pooling. Ask for specifics.
What happens if concrete cracks or fails within X years? Some offer warranties; some don't. Understand the terms. Poor ground prep might not be covered.
What's your timescale, and what affects it? Weather (especially frost or heavy rain) stops concrete work. They should explain realistic timescales and weather contingencies.
Can I contact previous customers? If they hesitate or refuse, move on. Good contractors are happy to provide references.

Write their answers down. Compare across your three quotes. The cheapest isn't always the best — but the most expensive isn't either.

Cardiff concrete & paving — the complete homeowner guide (2026)