Domestic Concrete Suppliers
Concrete for Patios – A Complete Guide
Concrete is one of the most popular and reliable materials for patio construction in the UK. Its strength, durability, versatility, and long lifespan make it an excellent choice for homeowners seeking a practical yet visually appealing outdoor surface. When designed and installed correctly, a concrete patio can last for decades with minimal maintenance, while also offering flexibility in finish, colour, and layout.
This guide provides a comprehensive overview of concrete for patios, covering concrete types, strength requirements, thickness, ground preparation, reinforcement, finishes, drainage, installation considerations, costs, maintenance, and common mistakes to avoid.
Domestic Concrete Suppliers
Concrete for Patios – A Complete Guide
Concrete is one of the most popular and reliable materials for patio construction in the UK. Its strength, durability, versatility, and long lifespan make it an excellent choice for homeowners seeking a practical yet visually appealing outdoor surface. When designed and installed correctly, a concrete patio can last for decades with minimal maintenance, while also offering flexibility in finish, colour, and layout.
This guide provides a comprehensive overview of concrete for patios, covering concrete types, strength requirements, thickness, ground preparation, reinforcement, finishes, drainage, installation considerations, costs, maintenance, and common mistakes to avoid.
Why Choose Concrete for a Patio?
Concrete patios offer several advantages over alternative materials such as paving slabs, block paving, timber decking, or gravel:
- Durability: Concrete is highly resistant to wear, weather, and heavy use.
- Low maintenance: Unlike decking or block paving, concrete does not require frequent cleaning, sealing, or weed control.
- Cost-effective: When strength and lifespan are considered, concrete often offers better long-term value.
- Versatility: Concrete can be brushed, stamped, coloured, or polished to suit modern or traditional designs.
- Structural strength: Ideal for supporting pergolas, garden rooms, hot tubs, and outdoor kitchens.
With proper installation, a concrete patio can remain structurally sound and visually attractive for 25–40 years or more.
Work out how much concrete you need
Patio Concrete Calculator
Use our free patio concrete calculator to work out how much concrete you need, and order it.
Start by entering your measurements for depth, length, and width.
Choose if you need a concrete pump or additional time to transport the concrete from the delivery truck to where you need it by wheelbarrow.
Then Click the button at the bottom of the calculator to check your delivery postcode, and follow the instructions.
Concrete for Patios
Recommended Concrete Types
Selecting the correct concrete strength is essential for performance and longevity. In the UK, concrete is commonly specified by strength class (C rating).
Concrete for Patios
Patio Thickness Requirements
The thickness of a concrete patio should be matched to its intended use and loading conditions.
- Standard patios: 100–125 mm
- Heavy-use patios: 125–150 mm
- Hot tubs or heavy structures: 150–200 mm
Insufficient thickness is one of the most common causes of cracking and failure. Thicker slabs provide greater load distribution and resistance to ground movement.
Concrete for Patios
Sub-Base Preparation
A well-prepared sub-base is just as important as the concrete itself. The sub-base provides a stable foundation and helps prevent settlement, cracking, and water pooling.
Recommended Sub-Base Specification
- Material: MOT Type 1 hardcore
- Depth: 100–150 mm (compacted)
- Installation: Laid in layers and mechanically compacted
The ground beneath the sub-base should be firm and free from organic material. On clay or poor ground conditions, a thicker sub-base or geotextile membrane may be required to improve stability and drainage.
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Concrete for Patios
Concrete Placement and Pumping
Many patios, particularly those at the rear of a property, benefit from concrete being delivered using a line pump.
Advantages of Pumped Concrete
- Faster and more efficient placement
- Reduced labour costs
- Cleaner site with minimal manual handling
- Improved consistency of pour
Adequate access for the pump vehicle and safe parking arrangements must be provided by the customer.
Concrete for Patios
Control Joints and Crack Management
Concrete naturally shrinks as it cures. Control joints are essential to manage cracking in a predictable way.
Joint Spacing
- Typically every 5–3 metres
- Cut or formed shortly after placement
Control joints help maintain a tidy appearance and prevent random cracking across the finished surface.
Concrete for Patios
Curing and Aftercare
Proper curing is vital to achieving full concrete strength and durability.
Best Practice
- Protect surface from drying too quickly
- Avoid foot traffic for at least 24–48 hours
- Avoid placing furniture for 7 days
- Full strength achieved after approximately 28 days
In hot or windy conditions, curing membranes or light misting may be required to prevent surface cracking.
Concrete for Patios
Costs and Budget Considerations
Concrete patio costs depend on several factors, including mix strength, thickness, access, and finish.
Typical Concrete Costs (UK)
- Supply only: £100–£130 per m³
- Installed: Varies depending on labour, preparation, and complexity
Additional costs may apply for:
- Pump hire
- Decorative finishes
- Reinforcement upgrades
- Drainage systems
While concrete may have a higher upfront cost than some alternatives, its long lifespan often results in lower long-term expenditure.
Concrete for Patios
Maintenance and Longevity
Concrete patios are easy to maintain.
Maintenance Tips
- Sweep regularly to prevent debris buildup
- Wash occasionally with mild detergent
- Avoid harsh de-icing chemicals
- Reseal decorative concrete as required
With proper installation and minimal care, a concrete patio can remain functional and attractive for several decades.
Good Practice and DIY Considerations
- Using insufficient concrete thickness
- Skipping reinforcement
- Poor sub-base preparation
- Inadequate drainage falls
- Placing furniture too early
- Failing to install control joints
Avoiding these mistakes ensures the patio performs as designed and avoids costly repairs later.
Concrete is an exceptionally practical and versatile material for patios. When the correct concrete strength, thickness, reinforcement, and preparation methods are used, it provides a long-lasting, low-maintenance solution suitable for everything from simple seating areas to structurally demanding installations such as hot tubs and garden buildings.
By planning carefully and following best practices, a concrete patio can greatly enhance outdoor living space, add property value, and deliver dependable performance for years to come.
Concrete for DIY projects
Concrete Calculators, tips & advice to successfully build these popular home & garden projects.
Domestic DIY Project FAQs
Frequently Asked Questions about Patios
When installed correctly with the right concrete strength, thickness, reinforcement, and drainage, a concrete patio can last 25–40 years or more with minimal maintenance. Its durability makes it one of the longest-lasting patio options available.
Concrete patios can be finished in multiple ways, including brushed, smooth trowelled, stamped (imprinted), and coloured finishes. Brushed concrete is the most popular for residential use due to its slip resistance and practicality. Decorative finishes may require additional sealing and maintenance.
Yes. All concrete patios should be installed with a minimum fall of 1:60, sloping away from buildings to prevent standing water. In larger areas or poor ground conditions, additional drainage measures such as channels or soakaways may be required.
Concrete patios should be protected and allowed to cure properly. Light foot traffic should be avoided for 24–48 hours, furniture should not be placed for at least 7 days, and full strength is typically achieved after 28 days. Proper curing significantly improves long-term performance.
Yes. Although concrete is strong in compression, it is weak in tension. Using steel reinforcement mesh (such as A142 or A193) and/or fibre reinforcement helps control cracking and improves durability. For best results, both systems are often used together.
A standard patio should be 100–125 mm thick. If the patio will carry heavier loads or frequent traffic, a thickness of 125–150 mm is advised. For hot tubs or heavy structures, thickness may need to increase to 150–200 mm to prevent cracking and structural failure.
For most domestic patios, C25 concrete is sufficient for seating and light use. C30 is recommended where there will be heavier foot traffic, pergolas, or outdoor kitchens, while C35 should be used for hot tubs or garden buildings due to its higher load-bearing capacity.
